I'm currently running with an inverter. It runs my main pump which is tee'd into a skimmer and a DIY heat transfer. I have to be home to make it work though. A friend of mine owns a Honda dealership. I can get a Honda generator at 10% above his cost. Not bad since mark up is usually around 4 times. I'll probably get one big enough to run at least my main pump, chiller and both refridgerators (I own a 2 family house, gotta take care of the tennants too). We lose a lot of money when our reefs go down. I hate adding a grocery bill on top of it. If I were to get the honda generator, is there a way to set it up like the guardian? Where it comes on when power goes out? I'll have to look into that. I love Honda generators though. One pull every time. Efficient and best of all, pretty quiet for a generator.