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Brad W

@bradw.bsky.social
62 followers 128 following 154 posts

Interested in Western Australia's main electricity grid and other goings on in climate and energy. Weekly summaries of the WEM. He/Him.

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Brad W @bradw.bsky.social · 29/09/2026
WEM stats — week ending 27 September: WEM generation by technology • Rooftop Solar: 21.2% • Utility Solar: 2.4% • Wind: 16.5% • Pumped Hydro: 0.0% • Battery Discharge 4.6% (2.7% Ren.) • Gas: 37.4% • Coal: 17.9% • Distillate: 0.0% Renewable contribution to demand: • WA: 42.8% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 21st to the 27th of September 2026. Black coal ran at 300 to 450 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 900 to 1400 megawatts in the evening and dropped to between 300 and 750 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 950 megawatts with lower output on Wednesday, Thursday and Sunday. Rooftop solar peaked at 1300 to 2000 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 120 to 190 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 700 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 29/09/2026
WEM stats — week ending 20 September: WEM generation by technology • Rooftop Solar: 20.7% • Utility Solar: 2.3% • Wind: 18.9% • Pumped Hydro: 0.0% • Battery Discharge 5.2% (3.4% Ren.) • Gas: 34.0% • Coal: 18.8% • Distillate: 0.1% Renewable contribution to demand: • WA: 45.3% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 14th to the 20th of September 2026. Black coal ran at 350 to 650 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1100 to 1700 megawatts in the evening and dropped to between 200 and 800 megawatts in the mid morning. Wind had moderate to high output during the week providing between 20 and 900 megawatts with lower output on Sunday. Rooftop solar peaked at 1450 to 2000 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 170 to 200 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 150 to 600 megawatts during the morning and evening. Distillate peaked at 15 megawatts.
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Brad W @bradw.bsky.social · 15/09/2026
WEM stats — week ending 13 September: WEM generation by technology • Rooftop Solar: 22.2% • Utility Solar: 2.5% • Wind: 21.9% • Pumped Hydro: 0.0% • Battery Discharge 5.3% (3.6% Ren.) • Gas: 23.7% • Coal: 24.4% • Distillate: 0.0% Renewable contribution to demand: • WA: 50.2% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 7th to the 13th of September 2026. Black coal ran at 400 to 750 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 450 to 1300 megawatts in the evening and dropped to between 150 and 500 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Sunday. Rooftop solar peaked at 1500 to 2000 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 150 to 200 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 150 to 900 megawatts during the morning and evening. Distillate peaked at 5 megawatts.
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Brad W @bradw.bsky.social · 12/09/2026
WEM stats — week ending 6 September: WEM generation by technology • Rooftop Solar: 16.6% • Utility Solar: 1.6% • Wind: 10.5% • Pumped Hydro: 0.0% • Battery Discharge 4.8% (2.2% Ren.) • Gas: 40.0% • Coal: 26.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 30.9%
Chart of electricity generation in the South West Interconnected System from the 31st of August to the 6th of September 2026. Black coal ran at 450 to 750 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 750 to 1800 megawatts in the evening and dropped to between 400 and 1150 megawatts in the mid morning. Wind had low to moderate output during the week providing between 20 and 750 megawatts with lower output on Monday, Tuesday and Wednesday. Rooftop solar peaked at 1300 to 1800 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 80 to 160 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 750 megawatts during the morning and evening. Distillate peaked at 5 megawatts.
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Brad W @bradw.bsky.social · 01/09/2026
WEM stats — week ending 30 August: WEM generation by technology • Rooftop Solar: 16.5% • Utility Solar: 1.7% • Wind: 13.7% • Pumped Hydro: 0.0% • Battery Discharge 5.2% (2.6% Ren.) • Gas: 46.0% • Coal: 16.9% • Distillate: 0.0% Renewable contribution to demand: • WA: 34.5% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 24th to the 30th of August 2026. Black coal ran at 300 to 430 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1200 to 2000 megawatts in the evening and dropped to between 500 and 1300 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 800 megawatts with lower output on Monday and Sunday. Rooftop solar peaked at 1000 to 1850 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 70 to 205 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 750 megawatts during the morning and evening. Distillate peaked at 20 megawatts.
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Brad W @bradw.bsky.social · 31/08/2026
WEM stats — week ending 23 August: WEM generation by technology • Rooftop Solar: 16.1% • Utility Solar: 1.9% • Wind: 11.4% • Pumped Hydro: 0.0% • Battery Discharge 5.0% (2.3% Ren.) • Gas: 50.1% • Coal: 15.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 31.7% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 17th to the 23rd of August 2026. Black coal ran at 200 to 430 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1200 to 2200 megawatts in the evening and dropped to between 500 and 1200 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 900 megawatts with lower output on Tuesday, Wednesday and Thursday. Rooftop solar peaked at 1000 to 1850 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 70 to 190 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 110 to 810 megawatts during the morning and evening. Distillate peaked at 15 megawatts.
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Brad W @bradw.bsky.social · 17/08/2026
WEM stats — week ending 16 August: WEM generation by technology • Rooftop Solar: 16.8% • Utility Solar: 1.9% • Wind: 13.7% • Pumped Hydro: 0.0% • Battery Discharge 5.7% (2.7% Ren.) • Gas: 41.4% • Coal: 20.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 35.1% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 10th to the 16th of August 2026. Black coal ran at 300 to 850 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 800 to 2000 megawatts in the evening and dropped to between 300 and 1200 megawatts in the mid morning. Wind had moderate to high output during the week providing between 10 and 900 megawatts with lower output on Wednesday. Rooftop solar peaked at 1300 to 1800 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 100 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 240 to 850 megawatts during the morning and evening. Distillate peaked at 5 megawatts.
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Brad W @bradw.bsky.social · 17/08/2026
WEM stats — week ending 9 August: WEM generation by technology • Rooftop Solar: 14.8% • Utility Solar: 1.4% • Wind: 11.2% • Pumped Hydro: 0.0% • Battery Discharge 4.7% (2.0% Ren.) • Gas: 40.4% • Coal: 27.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 29.4% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 3rd to the 9th of August 2026. Black coal ran at 550 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 650 to 1600 megawatts in the evening and dropped to between 450 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 900 megawatts with lower output on Wednesday, Friday and Sunday. Rooftop solar peaked at 1300 to 1700 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 100 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 80 to 700 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 17/08/2026
WEM stats — week ending 2 August: WEM generation by technology • Rooftop Solar: 16.1% • Utility Solar: 1.7% • Wind: 12.3% • Pumped Hydro: 0.0% • Battery Discharge 5.5% (2.4% Ren.) • Gas: 31.4% • Coal: 32.9% • Distillate: 0.0% Renewable contribution to demand: • WA: 32.5% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 27th of July to the 2nd of August 2026. Black coal ran at 700 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 650 to 1450 megawatts in the evening and dropped to between 350 and 850 megawatts in the mid morning. Wind had moderate to high output during the week providing between 20 and 800 megawatts with lower output on Monday. Rooftop solar peaked at 1400 to 1750 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 100 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 950 megawatts during the morning and evening. Distillate peaked at 90 megawatts.
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Brad W @bradw.bsky.social · 02/08/2026
WEM stats — week ending 26 July: WEM generation by technology • Rooftop Solar: 14.2% • Utility Solar: 1.8% • Wind: 13.0% • Pumped Hydro: 0.0% • Battery Discharge 5.4% (2.4% Ren.) • Gas: 44.6% • Coal: 21.0% • Distillate: 0.0% Renewable contribution to demand: • WA: 31.4% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 20th to the 26th of July 2026. Black coal ran at 400 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1200 to 2100 megawatts in the evening and dropped to between 500 and 1300 megawatts in the mid morning. Wind had moderate to high output during the week providing between 30 and 800 megawatts with lower output on Monday and Tuesday. Rooftop solar peaked at 1250 to 1700 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 130 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 850 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 22/07/2026
WEM stats — week ending 19 July: WEM generation by technology • Rooftop Solar: 13.2% • Utility Solar: 1.3% • Wind: 17.5% • Pumped Hydro: 0.0% • Battery Discharge 5.2% (2.3% Ren.) • Gas: 39.0% • Coal: 23.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 34.3% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 13th to the 19th of July 2026. Black coal ran at 400 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 800 to 1750 megawatts in the evening and dropped to between 300 and 1100 megawatts in the mid morning. Wind had moderate to high output during the week providing between 30 and 900 megawatts with lower output on Sunday. Rooftop solar peaked at 900 to 1650 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 50 to 160 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 200 to 900 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 16/07/2026
WEM stats — week ending 12 July: WEM generation by technology • Rooftop Solar: 12.6% • Utility Solar: 1.2% • Wind: 7.3% • Pumped Hydro: 0.0% • Battery Discharge 5.3% (1.7% Ren.) • Gas: 38.6% • Coal: 35.0% • Distillate: 0.0% Renewable contribution to demand: • WA: 22.8% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 6th to the 12th of July 2026. Black coal ran at 850 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1100 to 1800 megawatts in the evening and dropped to between 600 and 900 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 500 megawatts with lower output on Monday and Thursday. Rooftop solar peaked at 1200 to 1550 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 40 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 250 to 800 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 12/07/2026
WEM stats — week ending 5 July: WEM generation by technology • Rooftop Solar: 9.7% • Utility Solar: 1.0% • Wind: 13.3% • Pumped Hydro: 0.0% • Battery Discharge 4.9% (1.7% Ren.) • Gas: 38.0% • Coal: 33.1% • Distillate: 0.0% Renewable contribution to demand: • WA: 25.7% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 29th of June to the 5th of July 2026. Black coal ran at 800 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1100 to 1850 megawatts in the evening and dropped to between 400 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 80 and 800 megawatts with lower output on Monday and Thursday. Rooftop solar peaked at 1000 to 1400 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 110 to 170 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 30 to 730 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 05/07/2026
WEM stats — week ending 28 June: WEM generation by technology • Rooftop Solar: 12.3% • Utility Solar: 0.9% • Wind: 16.6% • Pumped Hydro: 0.0% • Battery Discharge 4.7% (1.9% Ren.) • Gas: 34.7% • Coal: 30.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 31.7% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 22nd to the 28th of June 2026. Black coal ran at 500 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 900 to 1850 megawatts in the evening and dropped to between 400 and 1000 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 800 megawatts with lower output on Monday and Tuesday. Rooftop solar peaked at 1200 to 1600 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 70 to 160 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 800 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 23/06/2026
WEM stats — week ending 21 June: WEM generation by technology • Rooftop Solar: 10.0% • Utility Solar: 0.9% • Wind: 10.8% • Pumped Hydro: 0.0% • Battery Discharge 5.1% (1.7% Ren.) • Gas: 41.8% • Coal: 31.3% • Distillate: 0.1% Renewable contribution to demand: • WA: 23.4% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 15th to the 21st of June 2026. Black coal ran at 800 to 1150 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1500 to 2000 megawatts in the evening and dropped to between 500 and 1200 megawatts in the mid morning. Wind had low to moderate output during the week providing between 30 and 700 megawatts with lower output on Thursday and Friday. Rooftop solar peaked at 750 to 1500 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 60 to 190 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 150 to 900 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 16/06/2026
WEM stats — week ending 14 June: WEM generation by technology • Rooftop Solar: 8.6% • Utility Solar: 1.0% • Wind: 9.7% • Pumped Hydro: 0.0% • Battery Discharge 4.6% (1.3% Ren.) • Gas: 38.4% • Coal: 37.6% • Distillate: 0.0% Renewable contribution to demand: • WA: 20.6% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 8th to the 14th of June 2026. Black coal ran at 800 to 1150 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 900 to 2100 megawatts in the evening and dropped to between 500 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 20 and 850 megawatts with higher output on Monday and Tuesday. Rooftop solar peaked at 300 to 1250 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 20 to 165 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 850 megawatts during the morning and evening. Distillate peaked at 25 megawatts.
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Brad W @bradw.bsky.social · 09/06/2026
WEM stats — week ending 7 June: WEM generation by technology • Rooftop Solar: 13.2% • Utility Solar: 1.3% • Wind: 9.2% • Pumped Hydro: 0.0% • Battery Discharge 5.5% (2.2% Ren.) • Gas: 41.4% • Coal: 29.4% • Distillate: 0.0% Renewable contribution to demand: • WA: 25.9% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 1st to the 7th of June 2026. Black coal ran at 400 to 850 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 1850 megawatts in the evening and dropped to between 700 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 0 and 650 megawatts with lower output on Wednesday, Saturday and Sunday. Rooftop solar peaked at 1300 to 1600 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 80 to 165 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 850 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 02/06/2026
WEM stats — week ending 31 May: WEM generation by technology • Rooftop Solar: 10.6% • Utility Solar: 1.1% • Wind: 16.9% • Pumped Hydro: 0.0% • Battery Discharge 4.0% (1.4% Ren.) • Gas: 43.5% • Coal: 23.8% • Distillate: 0.1% Renewable contribution to demand: • WA: 30.0% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 25th to the 31st of May 2026. Black coal ran at 300 to 850 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 2200 megawatts in the evening and dropped to between 450 and 1200 megawatts in the mid morning. Wind had low to moderate output during the week providing between 0 and 750 megawatts with lower output on Friday. Rooftop solar peaked at 600 to 1650 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 100 to 170 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 700 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 28/05/2026
WEM stats — week ending 24 May: WEM generation by technology • Rooftop Solar: 14.4% • Utility Solar: 1.9% • Wind: 11.6% • Pumped Hydro: 0.0% • Battery Discharge 3.8% (1.7% Ren.) • Gas: 44.3% • Coal: 24.0% • Distillate: 0.0% Renewable contribution to demand: • WA: 29.6% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 18th to the 24th of May 2026. Black coal ran at 350 to 850 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 1800 megawatts in the evening and dropped to between 500 and 1200 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 700 megawatts with lower output on Monday and Saturday. Rooftop solar peaked at 1050 to 1600 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 140 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 600 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 23/05/2026
WEM stats — week ending 17 May: WEM generation by technology • Rooftop Solar: 14.6% • Utility Solar: 1.7% • Wind: 10.0% • Pumped Hydro: 0.0% • Battery Discharge 4.4% (1.9% Ren.) • Gas: 46.7% • Coal: 22.6% • Distillate: 0.0% Renewable contribution to demand: • WA: 28.2% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 11th to the 17th of May 2026. Black coal ran at 250 to 650 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 900 to 1900 megawatts in the evening and dropped to between 600 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 10 and 900 megawatts with lower output on Thursday, Friday and over the weekend. Rooftop solar peaked at 1000 to 1700 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 110 to 160 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 180 to 650 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 13/05/2026
WEM stats — week ending 10 May: WEM generation by technology • Rooftop Solar: 19.4% • Utility Solar: 1.9% • Wind: 22.6% • Pumped Hydro: 0.0% • Battery Discharge 5.2% (3.1% Ren.) • Gas: 35.0% • Coal: 15.9% • Distillate: 0.0% Renewable contribution to demand: • WA: 47.0% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 4th to the 10th of May 2026. Black coal ran at 250 to 650 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1200 megawatts in the evening and dropped to between 400 and 900 megawatts in the mid morning. Wind had moderate to high output during the week providing between 20 and 1000 megawatts with lower output on Monday, Tuesday and Wednesday. Rooftop solar peaked at 1700 to 1750 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 120 to 180 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 150 to 900 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 09/05/2026
WEM stats — week ending 3 May:     WEM generation by technology • Rooftop Solar: 13.6% • Utility Solar: 1.1% • Wind: 12.4% • Pumped Hydro: 0.0% • Battery Discharge 4.2% (1.8% Ren.) • Gas: 46.7% • Coal: 22.0% • Distillate: 0.0% Renewable contribution to demand:   • WA: 28.9% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 27th of April to the 3rd of May 2026. Black coal ran at 300 to 650 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1200 to 2200 megawatts in the evening and dropped to between 400 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 20 and 700 megawatts with lower output on Monday, Tuesday and Wednesday. Rooftop solar peaked at 500 to 1650 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 80 to 120 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 150 to 650 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 02/05/2026
WEM stats — week ending 26 April: WEM generation by technology • Rooftop Solar: 18.5% • Utility Solar: 2.5% • Wind: 15.9% • Pumped Hydro: 0.0% • Battery Discharge 3.9% (2.2% Ren.) • Gas: 35.4% • Coal: 23.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 39.1% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 20th to the 26th of April 2026. Black coal ran at 200 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 750 to 1300 megawatts in the evening and dropped to between 400 and 1000 megawatts in the mid morning. Wind had low to moderate output during the week providing between 50 and 900 megawatts with lower output on Friday. Rooftop solar peaked at 1400 to 1800 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 170 to 200 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 600 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 27/04/2026
WEM stats — week ending 19 April: WEM generation by technology • Rooftop Solar: 18.2% • Utility Solar: 2.0% • Wind: 12.5% • Pumped Hydro: 0.0% • Battery Discharge 2.4% (1.1% Ren.) • Gas: 41.1% • Coal: 23.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 33.8% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 13th to the 19th of April 2026. Black coal ran at 350 to 750 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 1400 megawatts in the evening and dropped to between 600 and 900 megawatts in the mid morning. Wind had low to moderate output during the week providing between 50 and 700 megawatts with lower output on Thursday and over the weekend. Rooftop solar peaked at 1200 to 1850 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 130 to 200 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 500 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 18/04/2026
WEM stats — week ending 12 April: WEM generation by technology • Rooftop Solar: 19.7% • Utility Solar: 2.2% • Wind: 18.5% • Pumped Hydro: 0.0% • Battery Discharge 3.4% (2.0% Ren.) • Gas: 37.8% • Coal: 18.4% • Distillate: 0.0% Renewable contribution to demand: • WA: 42.4% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 6th to the 12th of April 2026. Black coal ran at 250 to 650 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 900 to 1300 megawatts in the evening and dropped to between 400 and 700 megawatts in the mid morning. Wind had low to moderate output during the week providing between 50 and 900 megawatts with lower output on Thursday and Sunday. Rooftop solar peaked at 800 to 1850 megawatts and followed a typical profile on days without cloud cover. Utility solar peaked at 130 to 210 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 100 to 700 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 09/04/2026
WEM stats — week ending 5 April: WEM generation by technology • Rooftop Solar: 21.1% • Utility Solar: 2.7% • Wind: 13.4% • Pumped Hydro: 0.0% • Battery Discharge 3.6% (2.0% Ren.) • Gas: 32.9% • Coal: 26.3% • Distillate: 0.0% Renewable contribution to demand: • WA: 39.2% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 30th of March to the 5th of April 2026. Black coal ran at 400 to 800 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1100 megawatts in the evening and dropped to between 200 and 700 megawatts in the mid morning. Wind had low to moderate output during the week providing between 0 and 750 megawatts with lower output on Tuesday and Saturday. Rooftop solar peaked at 1500 to 1900 megawatts and followed a typical profile throughout the week. Utility solar peaked at 190 to 220 megawatts during the day and followed a typical profile. Battery discharge peaked at 50 to 650 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 05/04/2026
WEM stats — week ending 29 March: WEM generation by technology • Rooftop Solar: 15.9% • Utility Solar: 1.7% • Wind: 28.3% • Pumped Hydro: 0.0% • Battery Discharge 3.4% (2.0% Ren.) • Gas: 26.7% • Coal: 24.0% • Distillate: 0.0% Renewable contribution to demand: • WA: 47.9% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 23rd to the 29th of March 2026. Black coal ran at 400 to 850 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1000 megawatts in the evening and dropped to between 300 and 600 megawatts in the mid morning. Wind had low to moderate output during the week providing between 150 and 950 megawatts with lower output on Sunday. Rooftop solar peaked at 250 to 1900 megawatts and followed a typical profile throughout the week. Utility solar peaked at 30 to 200 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 600 megawatts during the morning and evening. Distillate peaked at 15 megawatts.
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Brad W @bradw.bsky.social · 29/03/2026
WEM stats — week ending 22 March: WEM generation by technology • Rooftop Solar: 18.7% • Utility Solar: 2.2% • Wind: 12.8% • Pumped Hydro: 0.0% • Battery Discharge 3.5% (1.6% Ren.) • Gas: 36.2% • Coal: 26.6% • Distillate: 0.0% Renewable contribution to demand: • WA: 35.3% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 16th to the 22nd of March 2026. Black coal ran at 500 to 1100 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 1900 megawatts in the evening and dropped to between 500 and 1100 megawatts in the mid morning. Wind had low to moderate output during the week providing between 50 and 850 megawatts with lower output on Friday. Rooftop solar peaked at 1700 to 2000 megawatts and followed a typical profile throughout the week. Utility solar peaked at 140 to 220 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 950 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 22/03/2026
WEM stats — week ending 15 March: WEM generation by technology • Rooftop Solar: 21.1% • Utility Solar: 2.4% • Wind: 26.1% • Pumped Hydro: 0.0% • Battery Discharge 4.4% (3.0% Ren.) • Gas: 23.1% • Coal: 22.9% • Distillate: 0.0% Renewable contribution to demand: • WA: 52.6% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 9th to the 15th of March 2026. Black coal ran at 400 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 500 to 1300 megawatts in the evening and dropped to between 200 and 1000 megawatts in the mid morning. Wind had high output during the week providing between 100 and 900 megawatts. Rooftop solar peaked at 1400 to 1950 megawatts and followed a typical profile throughout the week. Utility solar peaked at 120 to 230 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 600 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 17/03/2026
WEM stats — week ending 8 March: WEM generation by technology • Rooftop Solar: 20.6% • Utility Solar: 2.6% • Wind: 12.4% • Pumped Hydro: 0.0% • Battery Discharge 3.1% (1.6% Ren.) • Gas: 34.1% • Coal: 27.1% • Distillate: 0.1% Renewable contribution to demand: • WA: 37.2% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 2nd to the 8th of March 2026. Black coal ran at 550 to 1150 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 1600 megawatts in the evening and dropped to between 400 and 1000 megawatts in the mid morning. Wind had low to moderate output during the week providing between 100 and 650 megawatts. Rooftop solar peaked at 1950 to 2050 megawatts and followed a typical profile throughout the week. Utility solar peaked at 150 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 850 megawatts during the morning and evening. Distillate peaked at 90 megawatts.
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Brad W @bradw.bsky.social · 06/03/2026
WEM stats — week ending 1 March: WEM generation by technology • Rooftop Solar: 22.3% • Utility Solar: 3.0% • Wind: 15.3% • Pumped Hydro: 0.0% • Battery Discharge 3.9% (2.3% Ren.) • Gas: 30.2% • Coal: 25.2% • Distillate: 0.1% Renewable contribution to demand: • WA: 42.9% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 23rd of February to the 1st of March 2026. Black coal ran at 400 to 1150 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1500 megawatts in the evening and dropped to between 300 and 1000 megawatts in the mid morning. Wind had low to high output during the week providing between 50 and 800 megawatts with lower output on Thursday. Rooftop solar peaked at 1800 to 2100 megawatts and followed a typical profile throughout the week. Utility solar peaked at 150 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 700 megawatts during the morning and evening. Distillate peaked at 90 megawatts.
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Brad W @bradw.bsky.social · 01/03/2026
WEM stats — week ending 22 February: WEM generation by technology • Rooftop Solar: 24.1% • Utility Solar: 3.6% • Wind: 19.0% • Pumped Hydro: 0.0% • Battery Discharge 3.8% (2.6% Ren.) • Gas: 28.0% • Coal: 21.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 49.3% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 16th to the 22nd of February 2026. Black coal ran at 300 to 800 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1700 megawatts in the evening and dropped to between 50 and 1000 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Friday. Rooftop solar peaked at 2000 to 2100 megawatts and followed a typical profile throughout the week. Utility solar peaked at 50 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 50 to 900 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 01/03/2026
WEM stats — week ending 15 February: WEM generation by technology • Rooftop Solar: 21.3% • Utility Solar: 2.8% • Wind: 20.7% • Pumped Hydro: 0.0% • Battery Discharge 3.2% (2.0% Ren.) • Gas: 28.0% • Coal: 24.0% • Distillate: 0.0% Renewable contribution to demand: • WA: 46.8% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 9th to the 15th of February 2026. Black coal ran at 400 to 1100 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 900 to 1750 megawatts in the evening and dropped to between 300 and 800 megawatts in the mid morning. Wind had moderate to high output during the week providing between 150 and 900 megawatts with lower output on Monday and Friday. Rooftop solar peaked at 1200 to 2100 megawatts and followed a typical profile throughout the week. Utility solar peaked at 50 to 250 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 700 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 15/02/2026
WEM stats — week ending 8 February: WEM generation by technology • Rooftop Solar: 22.2% • Utility Solar: 3.2% • Wind: 19.4% • Pumped Hydro: 0.0% • Battery Discharge 3.9% (2.3% Ren.) • Gas: 28.5% • Coal: 22.7% • Distillate: 0.1% Renewable contribution to demand: • WA: 47.1% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 2nd to the 8th of February 2026. Black coal ran at 400 to 1200 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1100 to 2200 megawatts in the evening and dropped to between 400 and 900 megawatts in the mid morning. Wind had moderate to high output during the week providing between 100 and 900 megawatts with lower output on Monday and Tuesday. Rooftop solar peaked at 1950 to 2100 megawatts and followed a typical profile throughout the week. Utility solar peaked at 240 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 800 megawatts during the morning and evening. Distillate peaked at 10 to 25 megawatts.
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Brad W @bradw.bsky.social · 05/02/2026
WEM stats — week ending 1 February: WEM generation by technology • Rooftop Solar: 23.7% • Utility Solar: 3.3% • Wind: 20.4% • Pumped Hydro: 0.0% • Battery Discharge 4.7% (3.0% Ren.) • Gas: 26.4% • Coal: 21.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 50.4% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 26th of January to the 1st of February 2026. Black coal ran at 350 to 1100 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1500 megawatts in the evening and dropped to between 200 and 800 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Monday and Friday. Rooftop solar peaked at 1600 to 2050 megawatts and followed a typical profile throughout the week. Utility solar peaked at 210 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 50 to 800 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 30/01/2026
WEM stats — week ending 25 January: WEM generation by technology • Rooftop Solar: 22.8% • Utility Solar: 3.3% • Wind: 18.4% • Pumped Hydro: 0.0% • Battery Discharge 4.2% (2.6% Ren.) • Gas: 30.6% • Coal: 20.6% • Distillate: 0.1% Renewable contribution to demand: • WA: 47.1% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 19th to the 25th of January 2026. Black coal ran at 450 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 800 to 2150 megawatts in the evening and dropped to between 400 and 900 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on the weekend. Rooftop solar peaked at 1600 to 2100 megawatts and followed a typical profile throughout the week. Utility solar peaked at 230 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 150 to 850 megawatts during the morning and evening. Distillate peaked at 10 to 20 megawatts.
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Brad W @bradw.bsky.social · 21/01/2026
WEM stats — week ending 18 January: WEM generation by technology • Rooftop Solar: 25.2% • Utility Solar: 3.3% • Wind: 19.0% • Pumped Hydro: 0.0% • Battery Discharge 4.2% (2.7% Ren.) • Gas: 29.5% • Coal: 18.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 50.2% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 12th to the 18th of January 2026. Black coal ran at 300 to 750 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 750 to 1450 megawatts in the evening and dropped to between 300 and 1000 megawatts in the mid morning. Wind had moderate to high output during the week providing between 100 and 900 megawatts with lower output on Friday and Sunday. Rooftop solar peaked at 2000 to 2100 megawatts and followed a typical profile throughout the week. Utility solar peaked at 200 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 900 megawatts during the morning and evening. Distillate peaked at 40 megawatts.
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Brad W @bradw.bsky.social · 17/01/2026
WEM stats — week ending 11 January: WEM generation by technology • Rooftop Solar: 25.3% • Utility Solar: 3.3% • Wind: 22.0% • Pumped Hydro: 0.0% • Battery Discharge 4.4% (2.9% Ren.) • Gas: 25.6% • Coal: 19.4% • Distillate: 0.0% Renewable contribution to demand: • WA: 53.5% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 5th to the 11th of January 2026. Black coal ran at 300 to 800 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 1300 megawatts in the evening and dropped to between 200 and 750 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Monday. Rooftop solar peaked at 1600 to 2050 megawatts and followed a typical profile throughout the week. Utility solar peaked at 200 to 240 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 700 megawatts during the morning and evening. Distillate peaked at 80 megawatts.
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Brad W @bradw.bsky.social · 11/01/2026
WEM Generation Summary for 2025: WEM generation by technology • Rooftop Solar: 20.8% • Utility Solar: 2.3% • Wind: 16.7% • Pumped Hydro: 0.0% • Battery Discharge 2.3% (1.4% Ren.) • Gas: 30.2% • Coal: 27.7% • Distillate: 0.1% Renewable contribution to demand: • WA: 41.2% 🔌💡
A chart of electricity generation in the WEM for 2025 that shows monthly generation by energy source.
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Brad W @bradw.bsky.social · 11/01/2026
Change in WEM Generation 2024 vs 2025 Overall Month by month 🔌💡
A chart of change in electricity generation in the WEM between 2024 and 2025 showing a year on year rise in coal output of ~150 gigawatt hours, a rise in combined cycle gas output of ~500 gigawatt hours reversing the change from 2023/24, a drop in open cycle gas output of ~900 gigawatts hours also reversing the trend from 2023/24, a rise in rooftop solar of ~800 gigawatt hours, a rise in wind power of ~100 gigawatt hours and a rise in battery discharge of ~400 gigawatt hours. A chart of change in electricity generation in the WEM in 2025 for each energy source per month relative to the previous year, showing variable change in coal use month to month. Open cycle gas use decline for most of the year. Combined cycle gas use was higher for a large proportion of the year. Rooftop solar was higher across the year given the steady increase in installs and wind power was quite variable month to month. Utility scale solar increased due to the commissioning of the Cunderdin facility. Battery discharge increased significantly relative to 2024 as new assets in Kwinana and Collie were commissioned and reached full output.
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Brad W @bradw.bsky.social · 11/01/2026
WEM stats — week ending 4 January: WEM generation by technology • Rooftop Solar: 25.8% • Utility Solar: 3.6% • Wind: 18.4% • Pumped Hydro: 0.0% • Battery Discharge 4.9% (3.2% Ren.) • Gas: 26.7% • Coal: 20.6% • Distillate: 0.0% Renewable contribution to demand: • WA: 51.0% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 29th of December 2025 to the 4th of January 2026. Black coal ran at 250 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 600 to 1800 megawatts in the evening and dropped to between 100 and 600 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Friday and Saturday. Rooftop solar peaked at 1950 to 2050 megawatts and followed a typical profile throughout the week. Utility solar peaked at 240 megawatts during the day and followed a typical profile. Battery discharge peaked at 150 to 850 megawatts during the morning and evening. Distillate peaked at 5 megawatts.
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Brad W @bradw.bsky.social · 10/01/2026
WEM stats — week ending 28 December: WEM generation by technology • Rooftop Solar: 25.1% • Utility Solar: 3.8% • Wind: 22.9% • Pumped Hydro: 0.0% • Battery Discharge 5.0% (3.5% Ren.) • Gas: 22.7% • Coal: 20.5% • Distillate: 0.0% Renewable contribution to demand: • WA: 55.3% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 22nd to the 28th of December 2025. Black coal ran at 200 to 1100 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 400 to 2000 megawatts in the evening and dropped to between 50 and 600 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Sunday. Rooftop solar peaked at 1700 to 2050 megawatts and followed a typical profile throughout the week. Utility solar peaked at 220 to 240 megawatts during the day and followed a typical profile. Battery discharge peaked at 100 to 1050 megawatts during the morning and evening. Distillate peaked at 20 megawatts.
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Brad W @bradw.bsky.social · 08/01/2026
WEM stats — week ending 21 December: WEM generation by technology • Rooftop Solar: 25.6% • Utility Solar: 2.9% • Wind: 19.5% • Pumped Hydro: 0.0% • Battery Discharge 3.6% (2.5% Ren.) • Gas: 29.4% • Coal: 19.0% • Distillate: 0.0% Renewable contribution to demand: • WA: 50.5% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 15th to the 21st of December 2025. Black coal ran at 200 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 700 to 2400 megawatts in the evening and dropped to between 100 and 1000 megawatts in the mid morning. Wind had low to high output during the week providing between 100 and 900 megawatts with lower output on Tuesday. Rooftop solar peaked at 1950 to 2050 megawatts and followed a typical profile throughout the week. Utility solar peaked at 160 to 240 megawatts during the day and followed a typical profile. Battery discharge peaked at 50 to 1000 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 08/01/2026
WEM stats — week ending 14 December: WEM generation by technology • Rooftop Solar: 24.9% • Utility Solar: 3.2% • Wind: 19.5% • Pumped Hydro: 0.0% • Battery Discharge 3.4% (2.2% Ren.) • Gas: 31.1% • Coal: 17.9% • Distillate: 0.0% Renewable contribution to demand: • WA: 49.8% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 8th to the 14th of December 2025. Black coal ran at 300 to 750 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 1000 to 2200 megawatts in the evening and dropped to between 400 and 800 megawatts in the mid morning. Wind had moderate to high output during the week providing between 100 and 850 megawatts with lower output on Tuesday and Wednesday. Rooftop solar peaked at 1900 to 2500 megawatts and followed a typical profile throughout the week. Utility solar peaked at 200 to 240 megawatts during the day and followed a typical profile. Battery discharge peaked at 50 to 900 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 09/12/2025
WEM stats — week ending 7 December: WEM generation by technology • Rooftop Solar: 30.7% • Utility Solar: 3.5% • Wind: 16.9% • Pumped Hydro: 0.0% • Battery Discharge 3.1% (2.3% Ren.) • Gas: 25.0% • Coal: 20.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 53.4% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 1st to the 7th of December 2025. Black coal ran at 275 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 600 to 1500 megawatts in the evening and dropped to between 50 and 700 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 900 megawatts with lower output on Tuesday. Rooftop solar peaked at 2300 to 2500 megawatts and followed a typical profile throughout the week. Utility solar peaked at 200 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 50 to 750 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 08/12/2025
WEM stats — week ending 30 November: WEM generation by technology • Rooftop Solar: 31.4% • Utility Solar: 3.9% • Wind: 18.7% • Pumped Hydro: 0.0% • Battery Discharge 3.9% (3.1% Ren.) • Gas: 21.3% • Coal: 20.8% • Distillate: 0.0% Renewable contribution to demand: • WA: 57.1% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 24th to the 30th of November 2025. Black coal ran at 275 to 950 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 500 to 1000 megawatts in the evening and dropped to between 50 and 400 megawatts in the mid morning. Wind had moderate to high output during the week providing between 100 and 900 megawatts with lower output on Wednesday. Rooftop solar peaked at 2000 to 2500 megawatts and followed a typical profile throughout the week. Utility solar peaked at 200 to 250 megawatts during the day and followed a typical profile. Battery discharge peaked at 150 to 650 megawatts during the morning and evening.
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Brad W @bradw.bsky.social · 29/11/2025
WEM stats — week ending 23 November: WEM generation by technology • Rooftop Solar: 25.1% • Utility Solar: 2.8% • Wind: 16.6% • Pumped Hydro: 0.0% • Battery Discharge 2.9% (2.0% Ren.) • Gas: 26.4% • Coal: 26.2% • Distillate: 0.0% Renewable contribution to demand: • WA: 46.5% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 17th to the 23rd of November 2025. Black coal ran at 300 to 1100 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 800 to 1300 megawatts in the evening and dropped to between 150 and 600 megawatts in the mid morning. Wind had moderate output during the week providing between 100 and 900 megawatts with lower output on Friday. Rooftop solar peaked at 1900 to 2500 megawatts and followed a typical profile throughout the week. Utility solar peaked at 170 to 250 megawatts during the day and followed a typical profile on days without cloud cover. Battery discharge peaked at 50 to 500 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 17/11/2025
New highest percentage of renewables for a calendar week on the SWIS of 60.1%, for the week ending 16 November 2025. New minimum scheduled demand on the SWIS of 318 MW recorded on 16 November 2025 at 8:00 AM.
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Brad W @bradw.bsky.social · 17/11/2025
WEM stats — week ending 16 November: WEM generation by technology • Rooftop Solar: 34.0% • Utility Solar: 3.2% • Wind: 20.7% • Pumped Hydro: 0.0% • Battery Discharge 2.7% (2.2% Ren.) • Gas: 20.1% • Coal: 19.2% • Distillate: 0.1% Renewable contribution to demand: • WA: 60.1% 🔌💡
Chart of electricity generation in the South West Interconnected System from the 3rd to the 9th of November 2025. Black coal ran at 250 to 900 megawatts with lower output in the middle of the day due to rooftop solar. Gas more or less followed demand, peaked at 500 to 1400 megawatts in the evening and dropped to between 25 and 650 megawatts in the mid morning. Wind had moderate to high output during the week providing between 50 and 950 megawatts with slightly lower output on Tuesday. Rooftop solar peaked at 2400 to 2600 megawatts and followed a typical profile throughout the week. Utility solar peaked at 140 to 250 megawatts during the day and followed a typical profile through most of the week. Battery discharge peaked at 70 to 450 megawatts during the morning and evening. Distillate peaked at 10 megawatts.
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Brad W @bradw.bsky.social · 12/11/2025
New peak instantaneous percentage of renewables on the SWIS of 90.8%, recorded on 3 November 2025 at 11:05 AM.
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