Investing your refund into home fixes like this that will save you money on utilities bills for years to come can be a smart move. (hrblock.com)
Yes, someone with a good income and a long history of paying utility bills on time would be a great credit risk for a mortgage. (money.stackexchange.com)
Next you take the annual savings in utility bills for the first and subsequent years until that number adds up to be equal to your «net system cost». (getsolar.com)