1. photovoltaic provides energy storage and residual power feed-in. When there is sufficient sunlight, part of the electricity generated by the solar array is used to meet the household's electricity needs, and the other part is stored in the battery bank. If there is still excess power, it is delivered to the public grid through a grid-connected inverter.
2. PV provides energy storage and part of the user's electricity. In this case, the electricity generated by the solar array first meets the household electricity demand, and the excess is stored in the battery bank. If the battery bank is also full, the excess power can be delivered to the public grid.
3. Photovoltaic provides only partial energy storage. In this mode, the electricity generated by the solar array is mainly used to meet household electricity demand and stored in the battery bank, and no electricity is delivered to the public grid.
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