OK...have decided we need more pool heat. Will be getting a couple more solar panels as well as a heater. I decided a heat pump is the way to go. I need suggestions/experience on different brands and sizes,etc. Anyone have any experiences with particular brands...good or bad? I am Thinking the Hayward HeatPro looks good. we have 24 ft round above ground, northeastern north carolina. 4 2 by 20 solar panels hooked up and running.....pool still too cold on cloudy days. Any advice is appreciated. Thanks!