It would work anywhere, but only with small amounts of current. In Germany the max is set to 800W. Won’t affect the grid much and standard wiring can easily handle 800W flowing „backwards“.
Germany has many rented apartments compared to eg the US. If you own a house, those systems make little sense. But for Germany, where many rent an apartment, it’s attractive for many. And the only way for many to ever profit from solar.
Germany has many rented apartments compared to eg the US. If you own a house, those systems make little sense. But for Germany, where many rent an apartment, it’s attractive for many. And the only way for many to ever profit from solar.