> unreliable

Few appreciate the “brick wall” facing variability in green energy: if the battery depletes, power flow stops.

Batteries cost the same to cover whatever multiple of standard deviation prepared for. “Hundred year calm/clouds” need be prepared for - there’s no discount on installing that battery backup, very costly for a rare event (still often enough to need coverage).

When the batteries deplete, system halts until nature decides to provide enough again. FF reserves can tide over, nuclear will glow on; green varies by hour where outages can last weeks.

I run my office on solar every summer. Battery depletion is a very real, common, and costly issue.