Wouldn't they be storing energy for such times - and/or, not be the only energy source, but supplemental.
As for home use - If cap and trade goes through and they control your thermostat - there will a lot of folk who would dearly love some of these in their back yard.
You are proposing added cost for autonomy.
And thats all these systems are good for at the moment.
When the Govts done you wont even have autonomy, just the added cost.
My understanding is that it is real-time energy all the time. Nothing is stored. On top of that, when the blade turbines don't have enough wind to turn them, they rely on electricity to turn them. How crazy is that? Plus, they are an eyesore. Learn more about turbines at Wind Action
These access roads need to be kept cleared during the winter so that the turbines can be checked on when needed. So a snow plow has to go out and clear the access road each time it snows. The generator is on the left.