What size solar panel do I need to run a water pump?

The size of the solar panel will vary depending on the pump that best fits your needs. The number of solar panels will depend on the wattage that a particular pump will need to operate, the phase type of the pump, and the age of the pump. You need to ensure that there is sufficient wattage from the solar panels to get the maximum performance possible out of a pump. Single phase pumps will require more panels than what three phase pumps will require. Typically you will receive either 100 Watt Panels or 300 to 375 Watt panels for a system.