When the power supply is on, WELLSEE AC/DC Inverter can convert alternating current into direct current and input it into the storage battery for storage.

When the power is cut off or rationed, the inverter will invert the stored DC into AC to supply for the user’s lights, TV sets, fans, refrigerators, freezers, kitchen ventilators, air-conditioners, computers, printers, fax machines, electrical switching gates, garage electronic locks and cash registers with electrical power.

 In  WELLSEE AC Inverter serials, the products with a final A of model numbers are the “Blackout Friend” series. The series is designed with a soft-start function to avoid the impact on electrical appliances from strong electrical current and prolong their service life. The products with a final B are the "UPS King" series, they are designed with a UPS function which can automatically switch between on and off of power, which is particularly suitable for computers because it can ensure the normal use of computers without interruption regardless of the condition of power (on and off).