We have a thread about solar power SOLAR POWERYou can't rely on your electric, gas, water, or any other outside source to provide you with the basic needs to survive. You MUST start looking into Solar and Wind.
it can be a pain in the but to keep an altanator spinning fast enough to chargeI like the roll up solar panels. I use to watch a survival show where they use an alternator and wind mill to create power to charge batteries. Seems like an interesting idea to do if SHTF.