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Si Cy

@sicy.bsky.social
310 followers 727 following 1.6K posts

In aviation but incurably curious about renewable energy & clean tech. Blame the Physics degree

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Reposted by Si Cy
Ian Dunt @iandunt.bsky.social · 19h
Counter: severe tax cliff edges, particularly in cases like this when the marginal rate spirals into infinity, are bad for everyone. They mutilate incentives and reduce overall wealth. They should be fixed and not avoided simply because they initially benefit wealthy people.
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Zeke Hausfather @zekehausfather.com · 03/10/2026
I often see people claim that because clean energy sources like solar, wind, or nuclear are manufactured using fossil fuels their emissions are high. But thats absolutely not the case: even accounting for full lifecycle emissions they are vastly better than burning coal or gas:
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Si Cy @sicy.bsky.social · 03/10/2026
Saw @bobbyllew.bsky.social’s video of this being built. Love to see this going into operation. I’m pretty sure it’ll be fantastic but best of luck to them regardless: www.linkedin.com/posts/vadim-...
linkedin.com
China Zorrilla Electric Ferry's Engineering Trade-Offs | Vadim Matskovyak posted on the topic | LinkedIn
This might be one of the most interesting electric vessels I’ve seen. The China Zorrilla is a 130-metre battery-electric catamaran built in Tasmania for Buquebus — and the numbers behind it are pret...
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stockfttp.bsky.social @stockfttp.bsky.social · 03/10/2026
😫
ember-energy.org
European electricity prices and costs | Ember
This data tool compares European electricity prices, carbon prices and the cost of generating electricity using fossil fuels and renewables. Where possible, data is provided by country.
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Duncan Robinson @duncanrobinson.bsky.social · 02/10/2026
God imagine if Starmer had gone ahead with that income tax rise, providing money to knackered state, building fiscal credibility and lowering inflation. At least ducking it let him keep his job Hang on
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Simon Evans @drsimevans.carbonbrief.org · 02/10/2026
Electric cars just had their best month ever in the UK Nearly 100,000 new BEVs sold, +36% year-on-year (Data from SMMT, which continues to lobby for weaker EV targets)
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Fiona Harvey @fionaharvey.bsky.social · 30/09/2026
This can’t be said often enough. It’s also true of net zero, and climate action more generally. coveringclimatenow.org/projects/the...
coveringclimatenow.org
The 89 Percent Project — Covering Climate Now
Check out The 89 Percent Project’s home online at 89Percent.org.   Introducing The 89 Percent Project The 89 Percent Project is a year-long global journalistic effort to explore a pivotal but little-k...
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Michael Liebreich @mliebreich.bsky.social · 30/09/2026
My favourite chart from the @IEA special report on electrification. Electricity is only 23% of Final Energy (No big deal), but it's 37% of Useful Energy (What?) and delivers 46% of GDP (Wow!) And it's going clean, fast. Still think there's no transition? iea.blob.core.windows.net/assets/1c696...
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Paul Mainwood @paulmainwood.bsky.social · 29/09/2026
Reminder that both the "mass vaccination = mass death" nutcases, and the "ongoing deadly pandemic" lot are proven wrong every day. Actuaries - whose jobs depend on getting death rates right regularly publish age-standardised mortality rates. Post-pandemic, back to a steady year-on-year improvement.
Chart showing standardaised mortality rates for England and Wales. After a steady improvement 2016-2019, and then a bunch of pandemic-driven bumps 2020-2022, the lines start improving again 2023-2026 which is shaping up to the best ever.
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Jan Rosenow @janrosenow.bsky.social · 29/09/2026
Wind and solar supplied 33% of EU electricity in the 12 months to August 2026, against 29% from fossil. In 2016 it was 13% and 43%.
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Adam Vaughan @adamvaughan.bsky.social · 28/09/2026
Installing solar panels and a battery in a UK home saves £681 a year on average, the first study of its kind has found: www.thetimes.com/uk/environme...
thetimes.com
Solar panels and a battery cut energy bills by two thirds
Private installations reduce costs even during winter months and would pay for themselves in 17 years, researchers found after analysing data from bills
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Andrew Sissons @acjsissons.bsky.social · 25/09/2026
Another piece on energy from me today (happy Friday, I guess!) This time it's a bit of a good news story: the latest on electricity prices decoupling from gas. Decoupling is still happening, and electricity bills would be higher if the UK didn't have so much clean power.
Chart shows the change in gas and electricity bills between April and October in 2022 and 2026 - during two energy crises.
In 2022, electricity prices rose almost as fast as gas prices (88% v 68%). In 2026, gas prices rose much faster (33% compared to 9%)
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Jan Rosenow @janrosenow.bsky.social · 26/09/2026
Electricity is 23% of global final energy but delivers 37% of useful energy and powers 46% of the global economy. We don't need to replace every fossil joule. We need to replace the services. A much smaller task. Great to see the @iea.org’s new Electrification report finally measure this.
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Si Cy @sicy.bsky.social · 25/09/2026
Trying to get my head round this. Might have to sleep on it: lnkd.in/p/eh-UT83h
lnkd.in
#energy #electricity #cfd #flexibility #netzero | Ben Watts
It's pumpkin season, and on Monday night Britain is due a big one. NESO has the wind dropping to 2.6 GW on Monday evening, then climbing 17 GW in a day as the first big storm of the autumn arrives. ...
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Attracta Mooney @attractamooney.bsky.social · 25/09/2026
This BBC tool to see just how hot and dry your postcode was this summer is very good. The area where the FT headquarters are had more than a month - A MONTH - of days that reached heatwave level this summer. That is wild. www.bbc.co.uk/news/article...
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Energy Stats UK @energystatsuk.bsky.social · 25/09/2026
New Video: Oil boiler vs heat pump, using the same 12,000 kWh of useful heat. At today’s prices: Oil 85%: £1,364 Gas 85%: £1,130 Heat pump SPF 3: £1,053 SPF 4: £790 The real comparison is the cost of useful heat, not the headline fuel price. youtu.be/SKgBTioDoUo
youtu.be
Heat Pump vs Oil Boiler: What 12,000 kWh of Heat Really Costs at £1 a Litre
YouTube video by Mick Wall (Energy Stats UK)
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Robin Hawkes @robhawkes.bsky.social · 25/09/2026
Ever wondered what that wind farm or gas plant nearby is? Well wonder no more as my patent-pending* Energy Radar will tell you! radar.robinhawkes.com *Not really patent-pending, it just sounds cool
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Si Cy @sicy.bsky.social · 25/09/2026
That is a absolute bargain for a brand spanking new car
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Dutch Cycling Embassy @dutchcycling.nl · 25/09/2026
How do you make a city more liveable? Geemente Den Haag can definitely give us some tips! Here is a wonderful transformation of the main square of the city, from a parking lot to a public square! 1978: © Stadsonwikkeling en Volkhuisvesting 2016: © Gemeente Den Haag
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Molly Lempriere @mollylempriere.carbonbrief.org · 24/09/2026
As petrol and diesel prices surge in the wake of the continued attacks on Russian refineries and escalating tensions in the Middle East, it is now nine times cheaper to drive an EV than a diesel car in the UK, This means EV drivers save ~£80 when "filling up" www.carbonbrief.org/analysis-evs...
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Si Cy @sicy.bsky.social · 24/09/2026
Massive windfarmy stuff: www.linkedin.com/posts/orsted...
linkedin.com
Two for two: Hornsea 3’s second offshore converter station has found its home in the North Sea 🙌 Thanks to extensive collaboration between teams at Ørsted and our partners from Hitachi Energy… | Ør...
Two for two: Hornsea 3’s second offshore converter station has found its home in the North Sea 🙌 Thanks to extensive collaboration between teams at Ørsted and our partners from Hitachi Energy, Aibe...
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James Murray @james-bg.bsky.social · 24/09/2026
Encouraging signs of life for a heat pump market that had stalled earlier in the year. www.businessgreen.com/news/4536262...
businessgreen.com
'Moving into the mainstream': Record number of heat pump grants issued in August
Last month saw highest ever number of discount vouchers issued in a single month since the Boiler Upgrade Scheme began in 2022
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Jenny Chase @solarchase.bsky.social · 24/09/2026
Reading about Australia power markets: "Average power prices fell between 40% and 65% across the National Electricity Market (NEM) year on year in 2Q 2026, driven by higher renewable output and increased battery discharge during evening peak demand periods." Paywall, www.bnef.com/insights/40165
bnef.com
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Paul Martin (Spitfire Research) @spitfireresearch.bsky.social · 04/03/2026
One container of solar panels shipped to Toronto, can generate enough electricity over their lifetime to replace about 42 container-sized tanks worth of diesel fuel (4200 MWh).
An image showing that one container of solar panels (1 TEU) can replace the electricity generated from 42 TEU containers of diesel fuel over their lifetime.
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Paul Martin (Spitfire Research) @spitfireresearch.bsky.social · 04/03/2026
One container (TEU) of LFP battery cells can store and return about 27 000 MWh of electricity over their lifetime- as much as 270 container-sized tanks of diesel fuel. Renewable energy is about reducing GHG and toxic emissions. But it's also about energy security and resilience!
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Si Cy @sicy.bsky.social · 24/09/2026
FAFO…
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Dan Snow @thehistoryguy.bsky.social · 23/09/2026
England is a made up thing. It has no basis in the ineluctable laws of nature. Its extent is defined by Edward II getting his arse handed to him. Athelstan conquering York. The Welsh of Cumbria were incorporated, the Welsh of Gwynedd were not. It is a political idea, an aspiration - not taxonomy.
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Dan Snow @thehistoryguy.bsky.social · 23/09/2026
What are ‘the canonical ethnicities’ anyway? German? Greek? Hungarian? Not Austrian, Belgian, Italian, Moroccan, Russian, obvs. Imagine being so assinine. You can be an Austrian German but not a Scottish English. A Bosnian Serb but not an Icelandic Norwegian. Where are the Burgundians at?
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Jan Rosenow @janrosenow.bsky.social · 23/09/2026
Aalborg now has 241,000 m³ of hot water storage, the largest in Denmark, plus 150 MW of electric boilers and a 177 MW seawater heat pump. That's 217 MW of flexible demand, holding one to three winter days of heat. District heating in Denmark is becoming a critical flexibility resource.
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Si Cy @sicy.bsky.social · 23/09/2026
Electric trucks are coming! The Chinese are so far ahead on this, it’s crazy but this is still great to see: lnkd.in/p/e6-jxY-2
lnkd.in
#truck #evrally #collaboration | Sara Sloman | 19 comments
No one talks about Truck Withdrawal. I’m missing this absolute beast. This was recorded just one hour into the first drive of my life in a truck of that size and calibre - what a machine. “Hey Mercede...
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Si Cy @sicy.bsky.social · 23/09/2026
Thread! And this graphic is simultaneously terrifying, and beautifully elegant in communicating loads of work & statistical jargon in a very clear & concise way.
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Leo Hickman @leohickman.carbonbrief.org · 21/09/2026
Just look at that chart?! This is shaping up to be the strongest El Niño of all time - by quite some margin... "Remarkable, in part, because of how early in the calendar year it is occurring. El Niño typically peaks in the winter months, most commonly in November or December."
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Duncan Weldon @duncanweldon.bsky.social · 21/09/2026
It is both really obvious and seemingly often forgotten that an awful load of pressing economic problems would be an order of magnitude easier if the Strait of Hormuz was open.
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Si Cy @sicy.bsky.social · 21/09/2026
Interesting data on usage patterns of EV rapid chargers:
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Si Cy @sicy.bsky.social · 20/09/2026
…is exactly what I’m paying a month. Spooky
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stockfttp.bsky.social @stockfttp.bsky.social · 18/09/2026
13hrs of windy pricing set for Sat. 💨
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Robin Hawkes @robhawkes.bsky.social · 18/09/2026
It's as if Sofia was listening. Note: this is "FPN" which means it's likely not the actual output (we'll need to wait days for that), but still…
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Simon Evans @drsimevans.carbonbrief.org · 16/09/2026
NEW ANALYSIS: Global fossil-fuel emissions are set to fall by around 0.5% in 2026 amid the ongoing Hormuz crisis We've all see the scare stories about a "return to coal" – but the "demand destruction" for oil is even bigger Here's how it stacks up: www.carbonbrief.org/analysis-glo...
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Ember @ember-energy.org · 16/09/2026
For decades, China followed the fossil-heavy development taken by other industrialised economies. But since the 2010s, China’s economy has been increasingly lockstep with electricity consumption – while fossil-fuel use flattens. ember-energy.org/lat...
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Paul Mainwood @paulmainwood.bsky.social · 15/09/2026
The CDC still maintaining that all these bodies - most of them very small - have nothing to do with measles. Hard to overstate how shameful a failure this is. www.cdc.gov/measles/data...
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Ed Conway @edconway.bsky.social · 15/09/2026
📽️ It looks as if the world is about to be engulfed in another spike in the cost of living. Here's my 13m explainer on how we avoided the worst of the energy shock this summer, and why we might not be so lucky this winter...👇 youtu.be/cuhNwc-E3lM?...
youtu.be
War, oil and interest rates: The chain reaction explained | Ed Conway analysis
YouTube video by Sky News
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Andrew Sissons @acjsissons.bsky.social · 14/09/2026
Ouch ouch ouch ouch ouch
Chart with headline “The Us has little incentive to ease the global gas squeeze”.
The charts show European (Dutch TTF) prices rising from $10 per MMBtu to nearly $30 now, while US prices have remained mostly flat below $5
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Tom Haddon @tomh-analyst.bsky.social · 14/09/2026
A team of journos, data viz people and writers have worked really hard at this and fair play, I think it is a really good stab at presenting the situation. A few things I would quibble but it's a thumbs up from me - super good presentation too: www.theguardian.com/business/ng-...
theguardian.com
Mapped: the £150bn megaproject that aims to protect Britain from energy shocks
Thousands of miles of new power lines are needed to deliver climate targets and energy security, but bills will rise in the short term and opponents are mobilising
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Private Eye Magazine @privateeyenews.bsky.social · 13/09/2026
The world’s scientists breathed a sigh of relief this week as temperatures in the UK dropped below 35 degrees, meaning that everything is fine and we can go back to burning fossil fuels forever without any worries. From the Private Eye archive. Issue 1682, August 2026.
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Si Cy @sicy.bsky.social · 12/09/2026
My sports club doesn’t have solar on the roof. I’ve volunteered myself to address this heinous absence. So is Sport England the best way to get a grant to help get over the upfront cost hurdle? Any other options or gotchas? Help appreciated!
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Robert Shrimsley @robertshrimsley.bsky.social · 10/09/2026
It's hard to think of anything less British than the morons doing this to the heroic RNLI
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Jan Rosenow @janrosenow.bsky.social · 10/09/2026
Global battery demand hit 1TWh by the end of July. That took 12 months in 2023, 11 in 2024, 9 in 2025. This year, 7. Grid storage is up 28% even as Chinese demand fell 6%. China's share: 60% in 2025, 37% now. The rest of the world is catching up. Data: Benchmark Mineral Intelligence
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Tom Haddon @tomh-analyst.bsky.social · 14/08/2026
Long term oil demand growth forecasts.
static.klipy.com
Chuckles I'm In Danger
ALT: Chuckles I'm In Danger
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Ember @ember-energy.org · 09/09/2026
China has added 1.7 TW of wind and solar in ten years ☀️🌪 That is MORE THAN its entire power system in 2015, when it was already the world's largest. Those renewables are now starting to push coal down as 🇨🇳's #energytransition enters a new phase. ember-energy.org/lat...
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Si Cy @sicy.bsky.social · 08/09/2026
The internet has been won! 🤣
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