This is how I combat short power outages. I am using a APC battery backup, my return pump and heater are plugged in to battery backup side. If our power goes out for any reason at all the backup will turn on and run my return pump and heater for +-40 minutes. Luckily for me I live in a newly developed neighborhood with all of the lines underground, this doesn't mean we won't have power interruptions but we've had good luck in the 4 years that I have lived here. None the less power outages are something we all will more than likely face at some point during our reefing career and with hundreds if not thousands of dollars of livestock this is a must have in my opinion to protect our investments.