That depends on the inverter and irs use case. The standard German ones are always connected to the grid and switch off when the grid fails. The can be complemented by a battery, which stores cheap self-produced electricity for later use. Depending on the type of electricity meter, they can also cause the meter to spin backwards. In the environment of Germany, which has a very very stable grid, all this makes good sense.
But you can also get inverters and batteries for “insular” systems, like for camping, which are not grid-connected. These will be more useful in countries where the grid is not stable. And then, you could combine both modes if the inverter circuitry allows that (or you switch inverters) - similar to an EV which is sometimes connected to the grid, and can act as a home battery, and sometimes not.
That depends on the inverter and irs use case. The standard German ones are always connected to the grid and switch off when the grid fails. The can be complemented by a battery, which stores cheap self-produced electricity for later use. Depending on the type of electricity meter, they can also cause the meter to spin backwards. In the environment of Germany, which has a very very stable grid, all this makes good sense.
But you can also get inverters and batteries for “insular” systems, like for camping, which are not grid-connected. These will be more useful in countries where the grid is not stable. And then, you could combine both modes if the inverter circuitry allows that (or you switch inverters) - similar to an EV which is sometimes connected to the grid, and can act as a home battery, and sometimes not.