Helicol Solar System installed with 7 twelve foot panels, automatic valve, pressure release valve, all black PVC piping, and control box costs approximately $4500.00. My pool is 10,000 gallons with an attached spa. Pool heats to 88 degrees easily. In fact, the pool made it to 88 degrees today, November 2nd. If I isolate the solar water to the spa only, the water easily makes it to the high 90's and beyond. I've had my system for 4 years and it has worked perfectly every day since.
One last comment: the pool is generally in the mid to upper 70's in December, January, and February. But the spa (because it is smaller) can reach the high 90's or more all year. So if the weather cooperates in January, we use the spa as our "mini" pool.
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