I've been looking at some dual 2x20 panels on eBay that apparently have replaced the 4x20 panels. I need to verify their overall size, and then possibly measure the max I can fit on the 20x21 section of open roof. I think I might be able to put 5 of them up there. Probably a tight squeeze, but that's the most sq ft for the buck. Heard anything good or bad about the smartpool sunheater panels? After that I'll have to do some budgetary sweet talking to get this pushed through. Wonder if it would be very hard to put one panel up there, then add one here and there? I figure I should be able to start out with manual valves without a controller, and hook the top panel up. Then as I add others, I'd just hook into that panel and shorten the supply side pipe and close the bypass a little. It's easier to swing a couple hundred at a time than a grand and a half.
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