Solar water heaters typically last around 20 years. However, if you properly take care of your solar water heater, it could last up to 30 years. Make sure that you keep the panels clean and free of debris, and that you flush the system every year to remove any built-up sediment.

Solar water heaters have a lifespan of around 20 years, but this can vary depending on the quality of the materials used and how well they are maintained. Good quality solar water heaters will have a warranty of 10 to 12 years.