Right now we're prepping to provide energy for the home should trouble arise. Here is what I am setting up:
First let me say I'm not an electrician but do have some basic knowledge so if you copy what I've done and catch your house on fire I'm not responsible and sorry I'm not a fireman either.
First I got a 3500 watt gas generator off of Ebay awhile back and stocked up with about 70 gallons of gas to run it. I don't want to wait in line at the gas station for $12/ gal gas.
Next, I got electrical box to switch my 6 most necessary 120v home circuits to the generator properly, quickly and safely. I chose the outlets in the kitchen, kitchen lights, refrigerator, deep freeze, family room and master bath lighting, washing machine etc.
I set up the new generator and tested it. I ran a 10 ga. 4 wire 30 amp cord from it (in my back yard) into my breaker panel in the garage. Now, I have all my most needed functions of the house covered with probably enough gas to last 2 weeks if we aren't wasteful and don't fire up the 42 inch plasma TV's. Generator $300, Electrical Switcher Panel $209, cord $75 all from Ebay.
Next I wanted to add some versatility. I picked up a $150 Chinese 12vdc-120vac inverter from Harbor freight. It is rated at 2000 watts continuous and 4000 watts intermittent. I set it up so I could run it into my transfer switch instead of the generator.
I plugged it into the house and hooked it up to my truck battery. It works perfectly as well.
I now can run my critical house functions from the grid, off of a gas generator, or off a car battery in the case of an emergency.
We're plumb out of cash right now but in the coming months I plan to buy some deep cycle batteries and some solar panels to keep them charged. At that point I will be able to run about 1/3 of my home off the sun all the time and save some $ too.