[beAbU]

Solar installation capacity is measured in watts, not watt-hours. So the unit you should he using here is GW, not GWh.

Pushes glasses up nose well actually, we should use GWp, but that's not really a unit and good ol' watts should suffice.

[dyauspitr]

Yeah, you know actually, I know this because I have an EV. I guess I just looked at what the GP posted and posted the same unit.

[mpwoz]

For batteries, GWh is the correct unit though (storage). Just not for panels/generators/etc.

[vizzier]

Really the correct unit is Joules, but try convincing anyone of that.

[beAbU]

Watt-hours and joules are the same thing, and you are indeed technically correct, but you'll get funny looks if you ask to buy an 18MJ BESS for your home...