05-08-2019, 09:04 AM
Our solar water unit has a maximum setting of 145F, and we have kept it at 140 for years with no ill effects. Drainpipe Plumbing installed it, and they were very professional . . . on time and no hidden costs. We also use their cleaning and "tune-up" service every few years. The tasty tax credits for solar water heaters have expired, but I think they still can pay for themselves.