Solar water heaters are usually used as a pre heater to conventional water heaters. The solar storage tanks are also of larger volume. The idea of the larger volume is that the solar tank is trying to store at least 1 days hot water usage. The solar tank on a sunny day will slowly heater the volume of hot water required for 24 hours of usage.

Q: “I know there are plenty of federal and state rebates for installing solar electric, but are there any government and state rebates for solar water heating?”

A: “You now can install a solar water heating system in PG&E area and receive up to $1875 rebate and a 30% Federal Tax Credit. This could pay for 40-50% of the solar water heating systems cost.”