Is anyone using solar heating for their swim spa? My swim spa will be in Las Vegas so there is lots of sunshine there and I was considering solar heating. Of course, that depends on costs to heat the swim spa and I have no idea what the heating bill would be with electricity. For planning purposes, say I used it once in the morning to swim at 80 degrees and once in the evening for spa purposes at 100 degrees.
How long does it take for the swim spa to heat from 80 degrees to 100 degrees?