Balcony photovoltaic (PV) systems typically consist of photovoltaic panels, a controller, an inverter, and power supply devices. The photovoltaic panels extract sunlight and convert it into direct current (DC), while the inverter converts the DC to alternating current (AC) for household appliances. However, when the PV system's power generation exceeds the household's load capacity, the excess electricity may flow back into the power grid, creating a phenomenon known as "reverse current." This not only affects the stable operation of the power system but may also cause grid surges and even safety accidents. Furthermore, reverse current may violate relevant electrical regulations, posing legal risks to the household.

Application of ASJ residual current operated relays in bathrooms

Closed-Loop Hall sensor from Acrel,Application in Solar and wind power systems.

Hall effect sensors offer high measurement accuracy (up to 0.5% for closed-loop types; Acrel's main closed-loop Hall effect current sensors include AHBC-LTA, AHBC-LT1005, and AHBC-LF), good linearity, and low temperature drift. This makes them not only "protectors" but also the "nerve endings" of the UPS system.

Hall effect sensors offer high measurement accuracy (up to 0.5% for closed-loop types; Acrel's main closed-loop Hall effect current sensors include AHBC-LTA, AHBC-LT1005, and AHBC-LF), good linearity, and low temperature drift. This makes them not only "protectors" but also the "nerve endings" of the UPS system.