Piney,

Carl and a couple of others here have good experience with solar panels so will be able to answer your question when they see it. The size of your pump will be important to the answer, especially if you are talking about mounting it on a roof instead of at ground/pool level.

I gave up on the solar thing myself. I've managed for many years without a heater and although I've become a bit of a pansy... I'll just keep on going. I don't think we're going to get much sun this spring anyway, so I don't regret my decision yet. I might in September when the pool starts dipping into the 70s again.

Jean