Hi Brimorga. I know you said you def want solar but since you already have a NG heater I'd seriously reconsider the solar. There is a reason people say "we're cooking with gas." If it's an operating cost concern heating your pool likely isn't as much as people think. If it's monthly cost i can share my NG costs and monthly bills. I'm in southern NY and even in our beginning and ending months of the swim season it's not a lot of money. If it's just an environmental concern i totally understand. It's just that in the shoulder months people typically don't have as much/intense sun so you might rely on the NG heater more than you anticipate. Either way it will be great!