Another approach to this it to examine your usage and look for ways to cut that back along with the addition of small generation capacity and battery storage capacity.

It is very difficult to concieve of replacing my 7 KWh I use with solar or wind. OTOH, If I can reduce that to 4 then it might be much more possible. Switching lighting to florescent is a major savings of wattage. Switching from flourescent to LED would be even greater savings. These cost something but you can get fixtures that "plug-n-play" with your current house wiring. Making sure that you have the most energy efficient appliances is important. The newer "energy-star" rated fridges are comparable to the super efficient stirling cycle 12 volt fridges of the '70s and are commercially available for a decent price. Getting a stand-alone freezer is more efficient. Downsizing your refridgeration needs to only dairy and cheese and using your vegies fresh, dehydrated or canned will save bunches. I have never understood why people buy items like carrots from an unrefridgerated shelf at the super and bring them home and refridgerate them. Everyone does but why? If you buy so much that you need to worry about spoilage then you can can it or dehydrate it. Both of these options last longer and don't require storage energy just processing energy. Also look into your heating and cooling needs and determine if there are ways to make the house more efficient. AC is an electricity pig! If you have a cellar then you have a ready made heat-sink that, with the proper application of ventilation, can cool quite a bit of air. Ventilation is cheaper than AC.

Once you have downsized you energy diet then take the new smaller wattage requirements and see if you can satisfy that appetite with some kind of co-generation local options like solar, wind, biomass, hydro etc. If you are on a stream, river, or even some sea shore locations, there may be decent small scale hydro options available. All of this starts to work better if the demand has been downsized first.

BTW, downsizing the demand from your household will lighten the load on the grid thereby reducing by some small percentage the likelyhood of a grid failure in the first place.