Hacker News: jonatron

Home Energy Model (Hem) Engine Written in Rust

jonatron — Sat, 13 Jun 2026 10:44:36 +0000

Article URL: https://github.com/communitiesuk/epb-home-energy-model

Comments URL: https://news.ycombinator.com/item?id=48515814

Points: 2

# Comments: 1

New comment by jonatron in "Leave Me Behind"

jonatron — Mon, 25 May 2026 14:19:26 +0000

Recently, I had some data for which I wanted some graphs. I uploaded the .jsonl file, and prompted "make a html page and graph this data using plotly". I wanted a report, and got a report, quicker than I could have made it myself.

New comment by jonatron in "Why is it called Kent House?"

jonatron — Tue, 19 May 2026 07:54:47 +0000

I only remember that station because of the weird road

New comment by jonatron in "Spain just became one of Europe's cheapest power markets. Here is how"

jonatron — Sun, 10 May 2026 18:28:34 +0000

I'm not sure this is true in the UK at least, which may be because the grid operator is conservative / cautious https://www.energy-storage.news/uk-grid-forming-batteries-mi...

New comment by jonatron in "Spain has become one of Europe’s cheapest power markets"

jonatron — Sun, 10 May 2026 18:14:36 +0000

Old power station turbines can be repurposed as inertia services via a stability market. Example in the UK: https://www.neso.energy/news/deeside-power-station-begins-wo...

New comment by jonatron in "Meta tells staff it will cut 10% of jobs"

jonatron — Thu, 23 Apr 2026 19:40:09 +0000

I find the scale of some companies hard to understand, they're laying off multiples of the total number of employees of the largest company I've worked at.

New comment by jonatron in "Advancing human gut microbiota research by considering gut transit time (2023)"

jonatron — Mon, 20 Apr 2026 08:29:40 +0000

I'm surprised there's no mention of hot drinks in the morning.

New comment by jonatron in "Seven countries now generate nearly all their electricity from renewables (2024)"

jonatron — Sun, 12 Apr 2026 18:45:54 +0000

They announced they're thinking about amending regulations to allow plug in solar at some point. Hopefully something eventually actually gets done.

New comment by jonatron in "Sonnet 4.6 Elevated Rate of Errors"

jonatron — Wed, 08 Apr 2026 06:59:39 +0000

If you look at the uptime graph, it's probably more newsworthy when it's up, not down.

New comment by jonatron in "Record wind and solar saved UK from gas imports worth £1B in March 2026"

jonatron — Tue, 07 Apr 2026 14:50:27 +0000

> If you had a big enough battery, could you sell electricity back to the grid later? Get paid to charge the battery, get paid to discharge the battery?

Yes, some people do this. There's even a startup built around the idea: https://www.axle.energy/

New comment by jonatron in "Record wind and solar saved UK from gas imports worth £1B in March 2026"

jonatron — Tue, 07 Apr 2026 14:42:26 +0000

Batteries are getting affordable too - Fogstar do a 16kWh battery for around £2000. Plus, grid scale iron-air batteries sound promising.

Octopus Energy's Agile Prices

jonatron — Sat, 04 Apr 2026 16:31:15 +0000

Article URL: https://agileprices.co.uk/

Comments URL: https://news.ycombinator.com/item?id=47640546

Points: 5

# Comments: 0

New comment by jonatron in "Renewables reached nearly 50% of global electricity capacity last year"

jonatron — Thu, 02 Apr 2026 17:35:36 +0000

Demand response for things like hotel air conditioning is a thing: https://www.bbc.co.uk/news/science-environment-23343211

New comment by jonatron in "Britain today generating 90%+ of electricity from renewables"

jonatron — Sat, 28 Mar 2026 14:54:05 +0000

Iron air batteries sound promising

New comment by jonatron in "‘Energy independence feels practical’: Europeans building mini solar farms"

jonatron — Fri, 27 Mar 2026 19:26:43 +0000

https://www.bgelectrical.uk/uk/circuit-protection/devices/rc... Right there, both bidirectional and unidirectional breakers.

New comment by jonatron in "Iranians describe scenes of catastrophe after Tehran's oil depots bombed"

jonatron — Mon, 09 Mar 2026 09:04:46 +0000

Crude oil is over $100/barrel now, affecting almost everyone everywhere.

New comment by jonatron in "Hamming Distance for Hybrid Search in SQLite"

jonatron — Tue, 17 Feb 2026 15:42:56 +0000

You could first calculate the distance of the first n bits (eg: 64, one popcountll) as a first pass, then calculate the full distance for candidates over a threshold from the first pass. It makes it approximate, but depending on the application it can be worth it.

New comment by jonatron in "Claude Opus 4.6"

jonatron — Thu, 05 Feb 2026 22:56:48 +0000

That's useless, unexpectedly just Google gives the correct answer.

New comment by jonatron in "Claude Opus 4.6"

jonatron — Thu, 05 Feb 2026 22:50:05 +0000

Can someone ask: "what is the current carrying capacity of 25mm multicore armoured thermoplastic insulated cables with aluminium conductors, on perforated cable tray?" just to see how well it can look up information in BS 7671?

Who Can Handle a Loop?

jonatron — Thu, 15 Jan 2026 14:05:11 +0000

Article URL: https://jonatron.github.io/randomstuff/loop/

Comments URL: https://news.ycombinator.com/item?id=46632696

Points: 1

# Comments: 0