Over the weekend I wrote some code to publish & plot my solar data. It's been a fun project, where I got to try out some new tech, like running Python in the browser by exporting the Marimo notebook as web assembly Live visualisation: jack-kelly.com/solar/ Blog post: jack-kelly.com/blog/2026-01...

The India Energy Stack looks pretty awesome. It will provide: • Unique IDs for assets, consumers, & transactions • Open & standardised APIs • Ecosystem innovation • Scalable, plug-n-play architecture that grid operators can adopt I wish the GB grid had unique IDs 😀 pulseenergy.io/blog/deep-di...

London. I love you. But, wow, you really need to put more thought into how to keep trains and busses cool in heat waves. It doesn't necessarily need AC. Just some windows designed to move outside air through the vehicle.

Many electricity grid operators estimate total renewable generation every half hour. e.g. in Great Britain we have Sheffield Solar's wonderful PVLive. But these estimates are uncertain because many generators don't report their live generation. So, shouldn't estimated totals be *probabilistic*?

The Trump administration's attempts to cut the overhead rates of grants awarded to universities from NIH, NSF, DOE, DoD, etc. have gone largely unnoticed outside of academia, but this move is a crucial aspect of the assault on American research universities. @andrewdessler.com wrote about it. 🧪

A HISTORIC MILESTONE: For the first time, solar power generated more electricity globally than nuclear, making it the world’s 4th largest power source. In just 5 years, solar output nearly tripled—from 79 TWh (Apr 2020) to 233 TWh (Apr 2025). The energy transition is speeding up. @ember-energy.org

“It was renewables that did it!” That was the headline after Spain’s blackout on April 28. But the official report published today points to other factors: chain reaction of overvoltages led to cascading generation disconnections. Human error played a big role too. media.licdn.com/dms/document...

Webinar on the past and future of IPCC scenarios TODAY: Tuesday, 17 June 2025, 15:00 – 16:00 CEST Here is a figure of the first three generation of 'baseline' scenarios used in IPCC assessment reports (SA90, IS92, SRES). @climatediamond.bsky.social climate-diamond.eu/diamond-webi...

There's an ML person who will try to convince you that papers don't matter, that only "shipping" impactful research does. That if it's not in prod it's not real. This is a flawed model of how long-term progress, which builds on prior work, happens.

Awesome new podcast geeking out on weather forecasting. From our friends at dynamical.org (including ‪@mrshll.com). dynamical.org/podcast/

So, in some ways I think the narrative around LLMs should be "wow, isn't it amazing how much knowledge *humans* have accumulated (and is now queriable via LLMs). Well done humans! Let's keep it up!"

I don't think we should consider LLMs to be some alien form of intelligence. Instead, I think of LLMs as a lossily compressed representation of a large portion of all *human* knowledge, that happens to be easy to query using natural language. LLMs don't know anything outside of human knowledge.

For years, I've been keen to help the energy forecasting community to accelerate progress. Better forecasts = cheaper electricity & lower CO₂ emissions I'm super-excited that I'm finally in a position to help. This doc sketches out my plans. I'd love feedback! docs.google.com/document/d/1...

I'm looking forward to attending this evening's lecture on the "Future of Energy Lecture" by Fintan Slye, the CEO of the GB National Energy System Operator (NESO). Maybe see some of you there?! www.biee.org/meeting/futu...

Great job opening: Vice President of Engineering at a VC-Backed Startup "on a mission to decarbonise computing power": docs.google.com/forms/d/e/1F...

I'm updating the UK solar power dataset that Open Climate Fix publishes on Hugging Face. I have some proposals for how to modernise the dataset. Please let me know if you have any concerns! My proposals are described here: huggingface.co/datasets/ope...

Imagine if all you had to do to serve geopspatial data over OGC APIs was to ingest @zarr.dev datasets into cloud object storage...and the platform handled the rest. Scaling, logging, metrics, auth, etc. That's Flux! Join our webinar if you want to learn more.

Great new job vacancy with some of my old colleagues at Google DeepMind: job-boards.greenhouse.io/deepmind/job...

Hot take: We get upset by Trump's inability to tell the truth. But lying is endemic in the business community. It's all about telling a good story. Truth be damned. Theranos was a particularly infamous example because the dangers of fibbing were so obvious. But similar levels of fibbing are common.

We’re building a new static type checker for Python, from scratch, in Rust. From a technical perspective, it’s probably our most ambitious project yet. We’re about 800 PRs deep!

Criteria for deciding which electric vehicle to buy: • In 2020: What's the range? How expensive is it? • In 2025: Will my purchase help fund the rise of fascism in the West? Will the manufacturer decide to use the vehicle as a weapon if they decide they don't like me / my family / my country?

Chuck Schumer and those in Congress either need to go to NOAA HQ with federal law enforcement officers to arrest non-government people who are committing crimes by accessing government systems. Or, they need to go on-air right now to explain why they're not!

Australian scientists: something we can do to help. Download NOAA data, especially climate data. It's all there on the website. 🧪

Losing NOAA would be devastating. Project 2025 authors want to get rid of it because it monitors climate change, and privatize the information it currently provides for free, so you'll have to buy information about the weather and the winds (imperative for mariners).

I hate nationalism. Yet, I'm currently looking into moving some of my compute jobs from American cloud providers to European providers. There are 2 options. Both are bad: 1) Help fund a nationalist US administration (by buying American); or 2) Act like an economic nationalist (by buying local).

Is anyone building LLMs fine-tuned to help write all the (very onorous) paperwork required to build a large wind farm or solar farm? If not, why not!?

I'm seriously impressed by Gemini v2's ability to help me understand research papers. It provided some excellent explanations of AlphaFold 2's architecture.

We are hiring several new full-time team members to help shape CCAI's organizational development and ongoing activities! Open roles: - Administrative Assistant - Development Director - Director of Operations and Projects Learn more & apply here: www.climatechange.ai/hiring

Please can someone build TrumpGPT: A large language model that keeps track of Trump's promises, and checks whether he actually delivers on those promises?!? (Maybe Gemini Deep Research can already do this?) (Or, maybe this is better suited to "good, old fashioned" human investigative reporting??)

The Faithfull in Traitors behave like unconditioned diffusion models: Turning pure noise into theories about who's a traitor, without any guidance.

thats ok im already fluent in anxiety

Maybe my kids won't have to deal with a freezing cold UK after all! phys.org/news/2025-01...

Hiring a Lecturer in Artificial Intelligence at UCL (Computer Science) www.ucl.ac.uk/work-at-ucl/...

I'm excited about TabPFN for energy forecasting! It's a new ML model for tabular data which is (almost) a drop-in replacement for XGBoost. It's transformer-based, and pre-trained on millions of synthetic datasets. Code: github.com/PriorLabs/Ta... Paper: www.nature.com/articles/s41... 1/4

My current obsession is to help accelerate progress in energy forecasting by making it as easy as possible to train, run, and research energy forecasting systems. Here's a post on why & how: github.com/JackKelly/le...

Today's Energy Headlines: UK electricity cleanest ever in 2024, with record 58% from low-carbon sources☀️ Heat pumps could be thousands of pounds cheaper within five years🏘️ Energy price cap predicted to rise again📈 Read them all and subscribe here: mailchi.mp/e06f6c7b055a...

I don't want my fridge to have a camera or Wi-Fi. I don't want my dishwasher to be smart. I don't want my washing machine to text me. In fact, I kinda miss knobs and dials and knowing big appliances would last 20 years and could still be repaired.

Origami Black Hole xkcd.com/3033

New Years resolution: Learn to love conspicuous autotune

LinkedIn is cool because I was always wondering what it would be like if people I sort of knew wrote mediocre press releases about themselves.

My first-ever keynote! At #LambdaConf2025, I’ll be speaking on how critical open source software has become to software projects in general, and how treating OSS as public goods—treating maintainers’ time as a “commons”—is wrong. OSS is infrastructure. Abstract: www.lambdaconf.us/speakers/chr...

It hasn’t all been doom and gloom… Though we’ve had our fair share this year…

Slightly drunken message - just deleted twitter/X. God that felt good.

We're told to "be ambitious". But I've always been unsure what that means, exactly! I now wonder if there are at least 3 definitions of "ambition": "Ambition" is doing something that: 1. You find hard; or 2. Your contemporaries think is impressive; or 3. Will help as many people as possible. 1/3

☀️ We're thankful that through The Patrick J. McGovern Foundation’s support, we have been able to advance our impact using AI for our changing climate–enabling the global expansion of our cutting-edge solar forecast.

Project News ⛅️👇 Together with The Alan Turing Institute, we're using generative AI to forecast cloud movements, enhancing our existing forecast model to enable solar to be more efficiently integrated into the UK electricity grid.

If anyone's interested, here's the diff showing how I added #Python support to my #neovim config (it's pretty easy). Using ruff, mypy, and pylsp. github.com/JackKelly/ki...

Returning to Python for the first time after writing Rust for a while... On the one hand, I'm loving new Python tools like uv and Marimo. On the other hand, I hate Python docs & code that lack type hints!

Britain’s turbines set new maximum wind record, topping 22,000 megawatts for first time on Sunday. National Energy System Operator said 22,243 megawatts (MW) of wind was generated on December 15, beating previous maximum wind record of 21,998MW set in 2023: www.independent.co.uk/business/bri...

Only a few years ago there were almost no electric vehicles being sold. This year China is approaching 50% share of electric vehicles in total sales. But Europe is not doing too badly either with 25% outperforming the US. Source RMI