What are the classifications of solar inverters?

The inverter is a device that converts the direct current generated by photovoltaic power generation into alternating current. The photovoltaic inverter is one of the important system balances in the photovoltaic array system and can be used with general AC power supply equipment.

Independent inverter: used in an independent system, the photovoltaic array charges the battery, and the inverter uses the DC voltage of the battery as the energy source. Many stand-alone inverters also incorporate battery chargers that can charge the battery from AC power. Generally, such inverters do not touch the grid and therefore do not require islanding protection.

Grid-connected inverter: The output voltage of the inverter can be returned to the commercial AC power supply, so the output sine wave needs to be the same as the phase, frequency and voltage of the power supply. The grid-connected inverter has a safety design, and if it is not connected to the power supply, the output will be automatically turned off. If the grid power fails, the grid-connected inverter does not have the function of backing up the power supply.

Backup battery inverter: A special inverter that uses the battery as its power source, and cooperates with the battery charger to charge the battery. If there is too much power, it will be recharged to the AC power supply. This kind of inverter can provide AC power to the specified load when the grid power fails, so it needs to have the islanding effect protection function.