Hacker News Reader

That's reassuring to know, thank you for pointing that out. I didn't get the impression this was already solved since you still keep hearing about battery fires, but hopefully this means that will be a thing of the past soon.

I would still skip this step and let it be the power company's problem though, simply because at ~400 USD / kWh they don't seem very cost efficient for off-peak storage (at least in my country).

View on HN

To be sure, they're a cost -- but at least in America, LiFePo4 batteries are practically being given away right now -- 100Ah@12V for ~$100 US. I suspect these are the "let's make hay before the tariffs hit" prices, but there are a lot of unpronounceable brands making surprisingly high quality products in the space.

As for off-peak storage, these would allow you to replace a Tesla powerwall for ~$600-750 US. I don't know your country, or its peaks (or valleys) but on my sailboat, off-peak is night time or cloudy days, and in sunny climes, 600ah gets me nigh infinite power. Without clear skies, I'm limited to ~4-5 days of normal consumption.

(Not trying to nudge you off your position at all, just sort of reflecting/remarking at how practicable this all is at the moment.)

I can order 2kWh of LiFePo on Amazon for 500€. Are batteries that much more expensive in the US?

Reply on news.ycombinator.com