If solar power is ever going to be a major source of electricity, researchers, engineers, installers, and solar panel array owners are going to have to pay closer attention to one essential component of the these systems--the inverter.
According to a study of solar arrays in actual operation, poorly designed or faulty inverters--devices that convert the DC power produced by solar panels to AC power that can be used in buildings or sent over the grid--can dramatically lower net power output. In one case, the inverters consumed hundreds of watts at night, decreasing overall power output by 40 percent. High temperatures caused inverter faults, and because the inverters had to be reset manually, about half the time when the sun was shining the array was producing no power.
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