xtremeownage, 10 months ago I built a homemade one. 2.4kwh of capacity. Should be good for a few decades easily. Wouldn’t call it cheap. But, it will be around for 15 or 20 years. xtremeownage.com/…/portable-2-4kwh-power-supply-u…
I built a homemade one. 2.4kwh of capacity.
Should be good for a few decades easily.
Wouldn’t call it cheap. But, it will be around for 15 or 20 years.
xtremeownage.com/…/portable-2-4kwh-power-supply-u…