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Summary: It is important to test the voltage of the solar panel to make sure that it is putting out what was expected. Learn how to use a meter to test solar panel voltage from a professional in this free energy conservation video.
Roger Bacon is the owner of RGB Home Repair and Renovation in Santa Barbara California. He has experience in all phases of home repair and renovations such as plumbing, heating,...read more
"So now we've got our BX wire coming from the roof with our solar panel attached. And, we're going to test the voltage now, just to see that we've got what we think we have. Here we've got our positive and negative and we've got our volt meter set to DC power. We're reading 38.78 volts, so that's pretty close to our maximum that we expect from this style of panel. Because we can also test the amperage that comes out of this device. If you're, if you're only working with one panel like we are you can actually touch the wires together and see what kind of action you get. There's a little bit of plasma from our solar panel if you hadn't believed that solar is good, that's electricity. If we switch this over to amperage, DC Amps, we can slip our clamp meter right on top of there and we're reading at let’s see, we'll zero it out. Zero there, and short these together again and momentarily read 2.6 amps. And if we do the math, 2.6 times 38, about 70 to 90 watts is all we're getting off of here. Which seems like it's a little low on power, but temperature deratings and various things, we're still getting plenty of juice out of our panel to let us hook up our charge controller."
eHow Article: Solar Panel Voltage Testing Meters