How much energy does your house consume?
There is much interest in Alternative Energy today but the soundest advice I can give you is to have an audit done today.
A comprehensive audit with a blower door test will expose deficiencies and air leaks in the house which can readily be fixed with air sealing and insulation. You will find your home more comfortable and the return on investment begins right away.
We need to meet our rising energy needs without fueling climate change.