If you are talking about DC inverters with DC output and AC inverters with AC output, then there are only AC inverters.
An inverter is a device that converts direct current into alternating current. This is the main function of the inverter. The inverter does not have the energy storage function. The inverter + battery has the energy storage function and can be used as an AC power supply for AC loads. It is usually used in solar power generation systems, UPS, mobile backup power supplies and other occasions. In addition to outputting AC power, some inverters are also equipped with DC output wiring ports or USB output ports, which can directly supply power to DC loads.
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