Sorry, for some reason I didn’t see these notes prior. Unfortunately, I do not know the answer.

Looks like a 1m2 solar panel exposed to 8h/day partial sunlight can keep a nerdqaxe running for about 4k Th/year, cost ~1k+ usd. That won't make anyone rich :-) that was just 20 minutes of exploration, I'm sure I can find a better plan.