Hello Friends,
A generator that runs off of natural gas or propane with an automatic transfer switch is what you need for piece of mind. Prices vary depending on what you want to run in a power outage situation. Do a google search for Guardian generators, check out the guardian web site. I checked locally here in Northern Ohio, and I can have the 10k not gas with transfer switch installed. I recommend you to purchase the battery with the optional AC charger. The Universal AC Charger has adjustable output voltage, you can set its output voltage same as or close to your device input voltage. In this case, you can leave the battery connected to your device when the battery is connected to the AC power adapter.
Best Regards,
Anthony Martello 