![](/static/253f0d9b/assets/icons/icon-96x96.png)
![](https://lemmy.world/pictrs/image/c47230a8-134c-4dc9-89e8-75c6ea875d36.png)
Modern meters take that into account (and you’ll get one by the energy provider if you don’t have it already when you tell them you installed such solar panels), everything that’s used in your home gets balanced against what you produce, regardless of which specific circuit uses / provides energy. (Only immediate usage though, and if you add a battery that can save your excess energy instead of feeding it back into the grid you roughly quadruple the cost so that’s quite a bit more expensive.)
I only know 16 amp breakers (~3600 W), not sure if lower current circuits are commonly used in Germany. In my experience every socket can power devices like a toaster or lawn mower, so they’re all suitable for such solar inverters.