I have a 25,000 gal pool with 1.5 hp Pentair fixed speed pump. Solar heater panels on the roof, tall single story house. Sorry but I don't have more info now - square footage of panels or anything. I also have a Jandy 1400 SWG. All 2" pipe. Heater works well. Pump equipment is pretty far from pool, at least 50-75 feet.
Normally, when solar is not enabled, my clean tank pressure is 15 and my flow meter reads around 55 gpm. When solar is enabled (automatic solar valve), the tank pressure increases to 20 and the flow decreases to around 45. Problem is that at that lower flow, my SWG flow sensor frequently goes to the "no flow" condition. The flow sensor is almost new. System came with the house, have had problems with this for a couple of years.
Any ideas to help me out?