How big a solar battery do I need to store *all* my home's electricity?

https://shkspr.mobi/blog/2025/09/how-big-a-solar-battery-do-i-need-to-store-all-my-homes-electricity/

Comments

14 points · 4 comments · view on lemmy.world

4 Comments

Blue_Morpho@lemmy.world · 8 pts · 328d (3 replies)

Interesting but absurd. You can't store electricity in batteries for 6 months. Lithium iron phosphate batteries self discharge 5% a month. Adding more solar to cover winter's lower light levels makes it work easily.

edent@lemmy.world · 3 pts · 328d (2 replies)

Author here. I do say that we don't have the technology to make this a reality yet.

Of course, the batteries would be discharging every night and throughout the winter deficit. But, yeah, the tech isn't there yet.

mesamunefire@piefed.social · 3 pts · 326d

Nice breakdown of the data! Im in an area where it gets very warm and almost no rain. Also its 50c a KWH...so solar is definitely something we are looking to get soon.

Wrufieotnak@feddit.org · 2 pts · 328d

It's interesting to see the data though.

And I remember hearing about one german company, that sells a system of normal batteries for short time storage and electrolysis/fuel cell for long time storage. In summer you generate the H2 and in winter you use it up when the solar batteries are empty.