A plugin solar kit generates electricity from the sun with solar panels. The micro inverter converts the panels’ DC power into AC power used in your household. A special cable connects the micro inverter to a normal Schuko plug in your home, feeding your kit’s power into your household’s power circuit.
That circuit is like a system of canals. At different points there are devices that consume energy (your fridge, lamps and other devices). The sum of that energy consumption is what at the end of the canal is fed from your power company into your household. Your power meter counts how much that power is at any time.
If you now connect a plugin solar kit to your canal, that kit feeds solar power into the network. Due to a slightly higher voltage, your devices use your solar power first. If you have several power circuits at home, these all meet at the distribution panel, which in turn is connected to your power meter and the grid. If there is excess power in the circuit your kit is connected to, it will spill over first to your other circuits that are demanding energy.
Beware that this only works in a single phase home network. If your network is triphase, a kit works in one phase only. You can connect different solar kits to each of your three phases.
Check out our explanation video on how this circuit works.