Sign in

David Perry

@dwjperry.bsky.social
633 followers 253 following 756 posts

Engineer/Scientist. Co-founder & CTO at BOOMPower, Director at Hepburn Energy Used to electrify 🧠 now 🏡 (less squishy).

PostsRepliesMedia
Reposted by David Perry
Dylan McConnell @dylanjmcconnell.bsky.social · 22/09/2026
New record (..that probably won't last long): 80.4% instaneous penetration of RE in the NEM over the weekend. More than half it coming from behind the meter (..rooftop solar) 🔌💡 www.theguardian.com/environment/...
Screen cap from openElectricity showing the generation profile on Sat 19th, where new record for instantenous generation (80.4%) was set around lunch time 

Rooftop solar supplied more than half of load at the time
083
David Perry @dwjperry.bsky.social · 21/09/2026
St Albans Evie fast chargers have the goods: - 6 bays - All CCS (sorry Leaf owners) - El Jannah
000
Reposted by David Perry
Greedling @greedling1729.bsky.social · 18/09/2026
Virgin AGI risk vs Chad Global Warming
5336139
Reposted by David Perry
The Australian Electric Vehicle Association @aevanational.bsky.social · 15/09/2026
BREAKING: BYD Automotive Australia has slashed the price of the 2026 Atto 1 Essential. It's now $19990 Drive Away. Thats up to a $7000 saving and is now the cheapest new car in Oz. Have we hit price parity yet? www.drive.com.au/news/2026-by...
drive.com.au
An EV just became Australia's joint-cheapest new car, now under $20K
The BYD Atto 1 electric-car has fallen below $20,000 drive-away, matching the petrol-powered MG 3's affordable price tag.
095
David Perry @dwjperry.bsky.social · 11/09/2026
I'm sorry but the Anthropic whistleblower is like 27. I cannot accept AI doomsday predictions from someone younger than Clippy.
0185
Reposted by David Perry
Tom Quinn @tomquinn.bsky.social · 01/09/2026
"This 𝑖𝑠 the work" Spoke with @reneweconomy.com.au the other day about the ongoing underinvestment by the renewable industry in public comms and engagement. To thr detriment of the entire sector.
reneweconomy.com.au
Outgunned: Five fossil fuel lobbyists spent $553,000 on Meta ads in August, the renewables industry just $3,090
Fossil fuel lobbyists are flooding social media with ads, outgunning the minimal effort of the renewables industry, which is leaving the work to cash-strapped NGOs.
062
Reposted by David Perry
By Cory Doctorow (GPG 0xBF3D9110957E5F4C) @doctorow.pluralistic.net · 26/08/2026
They disinvented the VCR. You might think that the reason we don't have VCRs anymore is because VCRs were supplanted by DVDs, PVRs and streaming, but that's not the case. They had it in for the VCR from the very start, and they never stopped trying to kill it. Eventually, they succeeded. 1/
A 1960s family living room in which a mom, dad and two kids are mesmerized by a cabinet-style TV. The image has been altered. The TV has an early 1990s VCR atop it. The TV screen is displaying a cross-sectioned human head with brains and spine on display. A huge fist has materialized in the room, with bloody spiked knuckle-dusters, smashing into the VCR. The oil painting over the sofa has been replaced with a pulp image of a male head, its cranium removed and replaced by a dome. Inside the dome is a red eight-segment VCR clock, displaying 12:00. The background in the painting is a tangle of cassette tape. The whole image's colors have been boosted, giving it an overexposed look.
311367581
Reposted by David Perry
Jenny Chase @solarchase.bsky.social · 03/08/2026
Unlike that of the rest of southeast Asia, Pakistan's gas demand has been falling. Pakistan's solar boom is partly attributable to excellent do-it-yourself videos on Tiktok and youtube, and partly to two other factors, says Zainaab Basil in an interview with BNEF. www.bnef.com/insights/40017
Chart of Pakistan's gas demand, historical and forecast, sourced to BloombergNEF which collated data from Pakistan Energy Yearbook, Pakistan Economic Survey, Bloomberg Terminal’s AHOY JOURNEY (historical), Independent System and Market Operator’s (ISMO) Integrated Generation Capacity Expansion Plan 2025-2035 (IGCEP 2025-2035), National Electricity Power Regulatory authority (NEPRA).

The chart shows gas demand by sector (grid power / domestic / fertilizer / industry / other / losses), in billion cubic meters. Between 2020 and 2025 the total dropped 16%, though it spiked in 2021 on higher losses. The main sectors in the drop were grid power, domestic and industry. This decline is expected to continue at a slower rate to 2035.
29023
Reposted by David Perry
Glyn Hudson @glynhudson.bsky.social · 30/07/2026
It's been 1yr since I installed a Grant HP290 heat pump and @newarkcylinders.bsky.social in my house! 🏠 Space heating SCOP 4.8 🚿 DHW SCOP 4.3 📊 Combined SCOP 4.7 💰 Running cost on Agile with battery: £567/yr 🛢️ Previous oil boiler would cost £2k to deliver same heat (72% saving)
36620
Reposted by David Perry
Lissa Harris 🌈🗑️🔥⚔️🐀 @lissaharris.bsky.social · 24/07/2026
if you can’t replace your stove, you can get a great little induction hot plate for about $100 mine handles all my pasta, soup, anything that needs boiling or simmering. boils faster than gas, holds a perfect simmer reducing gas use helps even if you can’t quit it
510539
Reposted by David Perry
Brendon Slotterback @bslotterback.bsky.social · 23/07/2026
People with asthma got better when they replaced their gas stove with electric. “Our improvement was about twice as much as you typically see with medical treatment of asthma,” www.climatecoloredgoggles.com/p/electric-s...
climatecoloredgoggles.com
Researchers used electric stoves to treat asthma. It worked.
The latest evidence that gas is bad for your health.
319479
David Perry @dwjperry.bsky.social · 23/07/2026
Lazy web request: I recall a mention of an Australian gas company running an internal staff training program alongside the lines of "fossil fuels are fine, actually". Anyone know more?
010
David Perry @dwjperry.bsky.social · 17/07/2026
"Honest opinion" is the new em dash, stop that shit.
000
David Perry @dwjperry.bsky.social · 16/07/2026
They shut down the freeway outside my town to film this... Zero effort to make it somehow look American 😛 youtu.be/aHrMFtt40_Q?...
youtu.be
The Mongoose | Liam Neeson | Official Trailer HD
YouTube video by Samuel Goldwyn Films
210
David Perry @dwjperry.bsky.social · 13/07/2026
Serious conniptions over potholes, but don't mention we just had the highest June daily rainfall on record when they all opened up? This is what global warming means for infrastructure. www.abc.net.au/news/2026-07...
abc.net.au
'Blown tyres, cracked rims': Victorian opposition's $5bn road repair pledge
The Liberals and Nationals are promising to make Victoria's roads a top priority if elected in November.
182
Reposted by David Perry
Dave Jones @cleanpowerdave.bsky.social · 10/07/2026
Conventional wisdom says rooftop solar meets **exisiting** electricity demand. What if rooftop solar actually **increases** electricity demand, improving living standards and driving economic growth? This is exactly what our new analysis of Pakistan's solar boom shows. Let's dig in.. 🧵
331458409
Reposted by David Perry
Dylan McConnell @dylanjmcconnell.bsky.social · 29/06/2026
Attention fellow energy nerds: we're running an "Open-Source Energy System Modelling Workshop" later this year! Looking for contributors - presentations, demonstrations, tutorials, and open discussion on topics relevant to the open-source energy modelling community .. anything really! 🔌💡
1146
Reposted by David Perry
Patrick Stokes @patrickstokes.com · 22/06/2026
Starmer being able to lay out his own departure timetable (potentially over months!) is silly. You don't give a PM a farewell tour, you do the numbers over the weekend, roll him at 10am, and tell the voters he's gone to live on a nice farm in the country. You amateurs. You absolute toddlers.
1637975
Reposted by David Perry
Tim Baxter @timinclimate.naruresearch.com.au · 22/06/2026
Shell’s Prelude is a big floating gas terminal located half-way between Broome and Timor. Let me tell you about how repeatedly exposing its workers to life-threatening risk between 2020 and 2023 have led to the facility being issued with $200m worth of entirely unearned offset credits. 🧵
46650
Reposted by David Perry
Gerry Doyle @mgerrydoyle.bsky.social · 08/06/2026
hey quick question, am I having a stroke
687132912087
David Perry @dwjperry.bsky.social · 04/06/2026
What an incredible image!
110
David Perry @dwjperry.bsky.social · 15/05/2026
Visited an EV charger at an oil refinery, which also hosts the one mythical hydrogen refuelling station in Victoria.
100
David Perry @dwjperry.bsky.social · 12/05/2026
Good stuff! I've come to the maybe cynical conclusion that these sorts of programs cannot solve for an "equitable transition" 🧵
241
David Perry @dwjperry.bsky.social · 08/05/2026
As an aficionado of playgrounds, this one in Penguin, Tasmania is an absolute banger.
260
Reposted by David Perry
Greg Jericho @grogsgamut.bsky.social · 21/04/2026
. @richarddenniss.bsky.social opens by pointing out that the Japanese govt actually raises more revenue from Australian gas than does the Australian govt! www.youtube.com/watch?v=ilVp...
youtube.com
Senate Select Committee on the Taxation of Gas Resources | 21/04/2026
YouTube video by Australian Parliament House Streaming Portal
816480
Reposted by David Perry
Commercial Solar Guy @commercialsolarguy.com · 19/04/2026
These are solar panels. Holy shit would I pay for this! "We present a new project we are working on, integrating our photovoltaic glass in 'Corten Steel' color. This glass is part of a collection consisting of 17 different colors, achieving power outputs of up to 160 W/m2." - Onyx Solar
Solar panels that look like copper siding to a building.A singel solar panel that looks like a piece of copper sidingSolar panels on a modern looking building that are copper coloredCloser image of solar panels with a texture that looks like a natural copper colored building material.
54112
Reposted by David Perry
Ketan Joshi @ketanjoshi.co · 14/04/2026
New @stand.earth: Microsoft's 3 new gas data centres will - Increase Microsoft's emissions 160% - Have higher emissions than power sectors of each of Greece, Ireland, Sri Lanka, NZ etc... - Have higher emissions than pwr sector of 15 lowest-emitting countries combined stand.earth/press-releas...
a chart showing 3 msft gas data centres vs countriesa chart showing 3 msft gas data centres vs countries
8250182
David Perry @dwjperry.bsky.social · 09/04/2026
Whoever does brand management for LEGO must be having a very bad month.
020
Reposted by David Perry
Mikell Taylor @mikell.bsky.social · 06/04/2026
I am just like the Artemis astronauts because I too have experienced a terrifying 40 minutes of not being online
0172
Reposted by David Perry
Amy Remeikis @amyremeikis.bsky.social · 26/03/2026
And I am so, so, so angry at the stupid culture wars and deliberate blocks put in place to the nation being able to have energy sovereignty. That any chance we had of transitioning the energy economy was derailed decades ago by fu*kers simping for fossil fuel. Energy security IS national security
4547105
David Perry @dwjperry.bsky.social · 20/03/2026
Lookie what I spotted in Kyneton!
A Rivian ute doing testing
231
David Perry @dwjperry.bsky.social · 11/03/2026
Get onto it Australia! Plenty more rooftops yet...
100
David Perry @dwjperry.bsky.social · 16/02/2026
Sorry, but this is hilarious.
theguardian.com
KPMG partner fined for using artificial intelligence to cheat in AI training test
Firm says person fined A$10,000 is one of over two dozen staff in Australia caught using AI in exams since July
000
David Perry @dwjperry.bsky.social · 05/02/2026
Saw Pauline in the security queue and five fossil fuel ads at the airport... that wouldn't happen on the train.
010
Reposted by David Perry
Courtney Milan @courtneymilan.com · 04/02/2026
I think people often wonder this, and it's a great question, so let me explain the advantages of 3D printing whistles. There are many. The 3D printing effort started from one of our organizers who started by sourcing mass-produced whistles.
161230406
David Perry @dwjperry.bsky.social · 27/01/2026
Imagine if Australia had electric interstate trains with these...
171
Reposted by David Perry
Randall Munroe @xkcd.com · 24/01/2026
Cost Savings xkcd.com/3197/
Comic. [Person pointing to graph on wall, addressing two people – one with close-cropped haircut, one with shoulder-length styled haircut – seated behind a desk.] PERSON: By lowering the planned satellite orbit, we can reduce the size of the launch vehicle required. We can reduce costs further by eliminating the satellite entirely in favor of an aerial platform. Some equipment could be moved to a ground-based facility, reducing required aircraft time. Additional savings could be… [caption] I’m trying to get NASA to build a shed in my backyard.
164427503
Reposted by David Perry
Mark Ogge @markogge.bsky.social · 16/01/2026
If you think the fossil fuel corporations trashing our climate should pay for the damage they cause... instead of YOU! Support our call for a Climate Disaster Levy on fossil fuel exports. nb.australiainstitute.org.au/climatedisas...
065
Reposted by David Perry
Ketan Joshi @ketanjoshi.co · 14/01/2026
It is really not all that long before there are more battery-electric vehicles sold in China than fossil combustion. And again, look at the number on the y axis on this chart. This isn't even accounting for 2/3 wheelers, trucks, etc. robbieandrew.github.io/carsales/
total new passenger car sales in China
38727
David Perry @dwjperry.bsky.social · 16/12/2025
Hmm, better not.
Do I need a giant golden chook from FB marketplace?
100
David Perry @dwjperry.bsky.social · 07/12/2025
Tiny trains! Tiny trains! Tiny trains!
100
David Perry @dwjperry.bsky.social · 03/12/2025
Our community-owned battery at Hepburn Energy (Bessie!) is almost ready to be commissioned and is looking amazing. First hybrid wind-battery system in Australia on the distribution network. Artwork by Ghost Patrol.
Shipping container battery with a painted mural.Shipping container battery with a painted mural, with wind turbines in background.
041
Reposted by David Perry
Annie Leymarie @annieleymarie.bsky.social · 27/11/2025
Those who feel that shifting to an induction cooker is too complicated, costly, or even impossible (renters, for instance) might consider buying a portable hob. They start at less than £30 for a single one and should do the job well! Good for your health, the planet (and your cooking)!
Pic of a single induction hob available at B&Q for £27.99
5297
Reposted by David Perry
Dave Jones @cleanpowerdave.bsky.social · 12/11/2025
This is really quite scandalous... the key assumption that means rising oil demand is that EV sales share will be the same in 2050 as in 2024 in EVERY COUNTRY IN THE WORLD (except China+EU) 🤷‍♂️
73211
David Perry @dwjperry.bsky.social · 03/11/2025
Not sure this is great policy, but it strikes me as very clever politics. Turning negativity around almost zero solar feed-in tariffs into free power for others. No-one can hate that...
120
Reposted by David Perry
Jenny Chase @solarchase.bsky.social · 20/10/2025
24. We oughtta be building more wind. Seriously, solar will get built anyway, but wind needs some help, and wind blows in the dark and in the winter. It doesn’t help that solar pushes down power prices and generates renewable energy credits (where relevant), which hurts wind farm economics.
316330
Reposted by David Perry
Jenny Chase @solarchase.bsky.social · 20/10/2025
5. Solar modules now cost 8.9 US cents per Watt (higher in US, India due to trade barriers). Solar panels are cheaper than ordinary fencing materials. For rooftop installs, non-module cost is still $0.50-3.00 per Watt, so further module price declines make little difference.
215622
Reposted by David Perry
Alex Hevesy @venomlance.bsky.social · 24/09/2025
This generic acetaminophen had an Amtrak ACS-64, four Amfleet 1 cars, a Conrail EMD GP15-1, and some Conrail rolling stock in it. The problem is more serious than I thought.
172371584
Reposted by David Perry
Elizabeth Spiers @espiers.bsky.social · 24/09/2025
👁️👁️
77512
David Perry @dwjperry.bsky.social · 23/09/2025
Ah yes, the standard "He Died with a Felafel in his Hand" clause.
000