A bit like flat-screen TVs, intense competition in the solar panel market means prices have dropped while quality has risen.

The ideal size for a solar panel system will be individual to you and your home. While the average system is about 20 to 25 panels, you need to understand what your energy needs are, what your ...

How to calculate solar panel system size If you’re wondering whether your roof is large enough for a full set of solar panels, there are a few quick steps you can take to get a fairly accurate ...

The good news: solar panels have really come down in price, often costing less than a third of what they did a decade ago. You can now find solar panels that work out, on average, to $2.50 to $3. ...

West Coast: 1.8 Midwest: 1.3 Finally, you'll need the solar panel's wattage. Divide the annual total wattage needed by the production ratio and then divide that by the wattage of your panels.