IME a lot of the difference between solar for the US vs Europe for example, is that the energy usage in the US is way higher (often due to HVAC usage), so you j

IME a lot of the difference between solar for the US vs Europe for example, is that the energy usage in the US is way higher (often due to HVAC usage), so you just need much larger sized systems than in Europe if you want to cover your usage fully. Our house here in NL is 3.5 kWp, people I know in the US have more like 20-30 kWp.