I have been looking at solar panels on eBay, wanting to stretch out my swim season a bit. Is eBay the best place to buy them? Is there a better time of year to shop for them or does the price remain pretty constant throughout the year? If I get it now, I would have to just lay it on the ground for the rest of this season, and then next year we would build a rack for it.
Most of the ones I have seen on eBay say they come with a diverter valve... what exactly does that do? Is there an easy way to bypass them if you need to run the pump without having the water go through the panels, for instance, if I want to filter at night?
Any general tips or advice on solar panels?