Do solar plants need water? Solar panels themselves do not need water to generate electricity. Water is required to clean the panels a few times a year. (A megawatt-hour is about what a typical California household would consume in six or seven weeks. While these photovoltaic systems need occasional cleaning, their operation demonstrates remarkable water conservation benefits. . Unlike traditional power plants that consume millions of gallons daily for cooling, solar farms operate with minimal water requirements.
[PDF Version]