I bought the F3800 plus 1 expansion battery and 2 400 watt solar panels. Yes, it's very heavy. Yes, you can plug it into a generator plug. I have one for my gas generator with a transfer switch. On the downside, my limited experience charging with the solar panels is very slow. Even in the direct South Florida sun I was only able to generate a maximum 500 watts using both panels, and the slightest cloud interference caused an immediate drop, often down as low as 75 watts total. So, I figure I'll need to use my gas generator along with solar to recharge when I have a power outage. Having said that, I expect it will help during outages and reduce my need for gasoline. My concern and reason for purchasing is post hurricane needs.