The main users of small off-grid systems below 2kW are poor areas without electricity, such as remote mountainous areas and some poor countries in Africa. They mainly solve the needs of lighting. The users are very price-sensitive. Therefore, it is recommended to use a PWM controller to correct the wave Inverter, the controller, inverter and battery are integrated. This method has simple structure, high efficiency, convenient connection for users, and low price. There is no problem in driving light bulbs, small TVs, and small fans.

For off-grid systems above 2kW, MPPT controller is recommended, which has high component utilization, high overall machine efficiency and flexible component configuration. Generally speaking, no technology is the best, so for users, they should listen to the opinions of experts and ensure that they choose the correct controller to meet their needs.

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