How much does adding solar power add to your homes value?

Question

a 4.2 K system providing 70 - 85% annual power average

Answer 1

Where do you live?  It really is dependent on geographic location as incentives, popularity, and amount of annual sun hours are all factors.  Places where solar is more common and electric bills are high, like California, the value is higher because electric bills are so high that it actually increases the homes value significantly because when on the market it can be sold as a home that has very low energy costs(ie, electric bills)

Answer 2

25 to 30 thousand bucks

Answer 3

Not nearly enough to justify the cost of installing it, unless you can get some really fat subsidies.  A solar system costs about $10 per watt of installed capacity, and a system can generate at most 2 kWh of electricity per installed watt per year, which is worth somewhere around 25 cents.  I have a friend who installed one; the list price was $13,000 but subsidies cut the net cost down to $5,000.  The system generates about $300 worth of electricity a year.