Yes, definitely. The plants in the greenhouse would suffer greatly without the exhaust fans running and my hydro farm would falter without a running CO2 generator. Although I don't often use the heat, I like having the option for that as well. In California we have to use a CARB compliant generator so they probably cost a little extra, but it's a must when planned power outages aren't uncommon. As such, we have a Generac standby generator that powers the house (though not every little thing) and greenhouses. We use portable solar powered generators as well, but mostly for smaller stuff.