I’m a little wary of plug-in solar in the US. Some of the bills propose allowing 1200 watt panels which can overload wiring depending on what else is on the circuit and how in the wall wiring is run. Limiting plug-in panel wattage to, say, 400 watts might be necessary
There are some interesting new technologies hitting the market. They use vibration to extract energy, rather than rotation. This is a lot more efficient at small scales. While they are extremely situation specific, they can outperform solar for some areas, particularly in winter.