Gregory's Server@isotopp @vladh I'm not sure batteries in the conventional sense are the answer.
Huge issues with mining the resources, lifespan and recycling.
However there are other options on a bigger scale. Ideas like Ben Cruachan near Oban is in essence a huge battery. Pump after uphill when there is surplus electricity and let it flow downhill when there is high demand. No nasty lithium and its water based so infinitely recyclable with a long lifespan.
@ScotInTraining @vladh
They totally are.
Around 5-10 kWh LFP per household that has solar, as a rough estimate the smaller of your daily usage after conversion to heat pumpt and electric car and the average solar yield in March or October.
If you allow grid charging for the battery, double the size to 20 kWh LFP.
https://www.zonneplan.nl/thuisbatterij
(And the geography that enables Oban does not scale, otherwise it would win)