With Peltier heating/cooling your electric bill and the cost of the things would put a dent in Bill Gates wealth. Joking of course but the cost and implementation would be prohibitive.
Its my understanding that these chips can generate electricity by applying heat/cold on one side or the other. I was thinking about running a length of copper piping pipe on one side to draw the heat into the solar box. The other side would be in the shade... Just an idea, I am not married to it and kinda just want want to play with the chips.

I have about a 22,000 gal IG pool and a homebew solar in the back field. Made some PVC manifolds to split the feeds for 12 100' sections of 1/2" black poly pipe layed out on about an 8x50 base made of black rolled roofing. If I remember right I think I can get 40,000 BTU/Hr from the thing. It's nowhere near the theoretical heat output because the pipes aren't spaced tightly as would be the case of a solar mat. But....it was CHEAP and I have the space and when the grass grows you can't see it.
How did you measure the 40000 BTU's?

I dont have nearly as much space as you Since thats the case, I am wondering if I will need to superheat the water someway in order to get a meaningful temp increase in the pool. If so, any ideas how....