Nope! More than 95% of PUD’s customer-generators have PV systems that do not include batteries. PV systems are interconnected to the grid, and through Net Metering solar customers get credit for excess power generation. Batteries are not needed in order to have power available when the sun isn’t out, or to benefit from energy produced when you aren’t using it. Batteries are an option if backup power is critical to you. If investigating PV with battery storage, make sure to learn about the added cost and maintenance of batteries as well as the impacts on estimated energy production.