Very interesting information on electrical solar use. I'd like to get feed back on the concept of usins solar pannels running water through them for pond heating. I've seen several articles on DYI solar panels, not too hard to build. It leaves a small pump to circulate, and thermostat valve to redirect the flow away from a heat exchanger if the flow is colder than the pond.
At 8 to 10 potential hours per day of heat would it be worth the effort?
Ed