You need to look at renewable power options along with your current energy source. You cannot rely on renewable energy sources at this time to offer all the energy requirements of your home.
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Basically, you won't be using much of the energy coming from electricity businesses so there is a chance that your monthly expenses will be decreased by more than half. The preliminary expenditure for alternative energy sources can be high, but it's well worth the money.
You should try changing your light bulbs if you are still utilizing incandescent bulbs. These bulbs release almost 98 percent of their consumed energy into heat so CFL or LED bulbs are more energy efficient.