Re: Natural gas generators are probably the best "battery back up"
They are just the ticket for storm prone areas - one of our own managers in Florida barely completed his installation last week when the power went out for 4 hours. Of course, winter storms in the north are just as devastating, and you need power to keep the furnace running or you risk freezing in the dark.
But if you do install a generator - all the more reason to install a regenerator like the PurePower 1050 that is designed for generator set use with Audio and Video systems. The Gen set will make great power for you lights, fridge and air conditioner - they aren't that fussy about power quality -- but to make natural gas or diesel generated power palatable for high end audio, you need a high quality AC regenerator to clean up the generator output to remove noise and distortion, keep the frequency stable and hold the voltage to accurate levels.
If you have a generator set you can test this yourself by comparing audio quality when running from the utility power (on a good power day) vs the generator, especially when running lots of motor loads. That said, you can't beat the sheer peace of mind of having your own independent power supply combined with a top quality conditioner for sensitive loads.