[photojosh]

Ah, but only one of those still operates in the dark.

[Retric]

50C is not much for heat engines your limited to under 15% effecency in the best theoretical case. So solar + battery is going to be a net win unless your thinking of flipping panels at night for ~1% more power over pure solar panels which is silly from a cost perspective.

[ianai]

I thought solar was widely favored long term, but it's going to be a long time before it establishes that position.