SBTS-3500 type photovoltaic grid-connected inverter is applicable to household roof solar energy or to other small types of parallel-operated solar power generation. The system is composed of photovoltaic batteries, a high frequency switch grid-connected inverter power supply, a metering device, a lightning protector, and a distribution system. The solar energy is first converted into direct current through the photovoltaic batteries and then converted by the inverter into sine wave current with the same frequency and phases as the power grid, and part of the electric power is supplied to local loads. The remaining electric power is fed into the power grid to be supplied to other users within the region concerned. The user can sell his electric power to the electric power company for profits.

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