Comment by mschuster91

> Remember, this is just a bit of fun. There's no practical way to build domestic batteries with this capacity using the technology of 2025.

Huh? A single Tesla Powerwall 3 stores just about the same 13.5 kWh the author describes as being the battery size they need [1]. And they are by far not the only ones offering ready-to-install battery packs.

Fully electric vehicles with vehicle-to-grid wallboxes enable even larger systems.

[1] https://www.tesla.com/de_DE/powerwall?redirect=no