This depends on the battery capacity and inverter power used by the user, which is not within the control of the solar panel. Solar panels for solar street lights are only used to charge the battery, not to store electricity. Solar energy charges the battery, and the battery discharges to power electrical equipment. This is a charging and discharging process. The size of the inverter determines the power needed to drive the electrical appliance, while the size of the battery depends on how long it can provide power. Customers need to have some basic knowledge of electricity. If they do not understand these principles, they can seek more advice.