Off-grid inverters are mainly used to convert direct current (DC) power collected by solar panels into alternating current (AC) power for use in off-grid systems. They are usually used in independent systems disconnected from the power grid and need to support autonomous operation and battery management of off-grid systems.
Another simple name for a grid-connected inverter is on grid solar inverter, which corresponds to off grid solar inverter. The grid tie power inverter converts the electricity generated by solar panels or other renewable energy systems into AC power and injects it into the grid. This means that when the grid-tie inverter is working if the power generation exceeds the required power consumption, excess power can be injected into the grid. It does not support battery storage management. In order to solve the power storage problem of the grid-tie inverter, the current stage is the grid-tie hybrid solar inverter, which supports hybrid inverters that are off-grid, grid-connected, and battery-managed.