Off-grid photovoltaic power generation system is composed of solar cell components, controller, inverter, battery pack and bracket system. They can generate DC power directly during the day or stored in a special solar battery pack to provide electricity at night or on cloudy or rainy days. In the process of designing off-grid photovoltaic power generation systems, an indispensable part is the design of batteries. Including the capacity design of the battery and the series-parallel design of the battery pack. The manufacturer of special solar batteries will introduce to you how to calculate the configuration of special solar batteries in off-grid photovoltaic power generation systems.