Alternatively, you can use the NREL PVWatts calculator, which offers a close estimate by ... Finally, you'll need the solar panel's wattage. Divide the annual total wattage needed by the production ...

Many solar benefit programs calculate financial incentives by the per-watt capacity of your solar system. Since high-efficiency panels have a higher wattage, they can qualify for higher incentive ...

Looking for a solar system for your home? See how many panels you’d need and get a free quote from an installer below. Leonardo David is a writer and energy consultant who has worked on projects ...