Literally within a day or two of adding my first corals my power went out. I learned early (and not that long ago) how important a back up plan was. What saved my tank was actually a $34 cig lighter inverter that plugged into my car with 2 outlets that previously was for camping trips... it kept the tanks going until I got back with a generator from the hone depot. I would highly recommend the Ryobi inverter style generator from the Home Depot, worked great for a few days, was under $500, runs reasonably quite (half as loud as a normal generator). If you can afford the Honda, it’s much quieter, but for 1/3 the price , the small ryobi inverter style is electronics safe... so it kept the kids playing games as well, and out of my hair during the power outage. It also uses half the fuel for twice the run time as a traditional generator, not that big and perfect for tuning a couple tanks, the fridge and a few TVs when the power is gone. You can also run it 24 hours a day, just make sure you get the correct model number. They make one for below 2000 elevation and one tuned for 3000 and above... I had to have mine serviced because I got the wrong one.even though my Home Depot is at 2,500 elevation they sold me an under 2000 elevation model. That little tidbit makes all the difference in it operating efficiently and idling down when under less load.