We all know that gasoline is priced in dollars per gallon. (Duh.) We also all know about how far we’ll be able to drive after shelling out 40 bucks for a tank of gas. When it comes to solar power, however, not many of us know how the cost of solar panels is measured. Nor, [...]

The costs of solar panel systems continue to fall. A new report says by the end of 2009, system costs will have fallen 50 percent.