My own emergency powering system consists of solar panels and
batteries.

I am building it in a stepwise fashion. The local Harbor Freight
occasionally has sales on small solar panels. My goal is to eventually
have 50 watts worth of panels. I'm at around 5 watts now, and charging
batteries with it. I run HF at around 50 watts, in fact used it for
last year's field day as a off-the grid demonstration with my Kenwood
480. Took it the whole way from full power to qrp levels and it worked
well at all of them. 50 Watts seemed to be the best compromise between
desired power and battery life. After draining the battery, I switched
to QRP.

But when I reach the 50 watt level, I expect the cells and batteries
to keep up pretty well.

-73 de Mike N3LI -