I treat my house just like camping off the power grid when the 120VAC power goes off...
I have two of those 1800WATTS Small COMPUTER UPS Systems... These has internal batteries that usually keeps everything going after the power goes for a good 30minutes to an hour so that you can safely shut down things.
ADDED NOTE: Just checked the my two UPS units. They are POWERWARE 2700W 120VAC model 5125. I have more emergency power than I realized...
These small UPS unit also has external 12VDC battery terminals on them. I am planning to move my somewhat depleted GP24 12VDC batteries from my trailer when I replace my trailer batteries soon to the outside of my house near my radio room/computer room and feed the UPS unit along with several other 12VDC radio items inside the radio room. I will have around 255AHs 12VDC battery capacity feeding my radio room.
From my 1800 UPS Unit I can run a couple of temp 120VAC extension cords to our home entertainment area and a couple of other useful places to mount some CFL fluorescent bulbs. I can also run my fridge from the source as well for a couple of hours each day to keep everything frozen in the fridge.
I have been doing this method for some some time already but never had more deep cycle batteries installed on the house side. It is no big hassle for us to have a couple of long extension cords running thru the house.
Doing this method of living off the batteries I will only need to run my 2KW Honda generator only three hours a day to keep my battery bank recharged. On my trailer hookup the 255AHs capacity will run us rather fine all day long with the normal 1-2AMPS "parasitic drains" and a heavy usage of 20AMPS or so between 8PM and 11PM running the home entertainment items and other 120VAC thing want to have running. The 255AHs batteries then will last just fine until 8AM the next morning when we we usually run the 2KW Honda generator to re-charge the battery bank when camping off the power grid. Doing this for the house when the power goes off is no different for us.
A great PLAN B to have available. We survived the two previous hurricane seasons just fine with one outage over a week long. The only problem we encountered was to locate some gasoline for the generator as the whole area around us was without power. Finally found a gas station running on emergency power.
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS