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Three roofs with solar panels, blue sky in the background
Newswise — Solar energy can take many forms, but one of the newest in the United States is balcony solar. Already legal in Maryland and Virginia, with a bill pending in D.C., these compact units offer Mid-Atlantic renters and homeowners an inexpensive way to diversify their energy options, reduce stress on the grid, and save on their monthly bills.
Virginia Tech energy expert Saifur Rahman explains that, “Unlike more traditional rooftop solar systems that have existed for decades, the DC-AC inverter that comes with the panel connects directly to the household electrical outlet. It has electronic controls that allow electricity to flow to the house or apartment without any additional hardware.”
Because these systems are much smaller than full-house systems, they won’t replace your full energy load. Rahman says how much energy you can generate depends on how much space you have and the size of the panel you’re using. A typical 540-watt solar panel measures 90” x 68”.
“Two south-facing 540-watt panels will produce about 125 kWh of electricity in a clear, sunny month — a bit more in summer and less in winter,” says Rahman. “This will save the homeowner about $12 to $15 per month in Virginia.”
For those concerned about the broader increase in energy use across the region, adding balcony solar will also alleviate a bit of stress from the overall grid. But Rahman cautions that for optimal results, you do need a southern exposure — “if the balcony happens to face north, the above calculations will not hold.”
About Rahman
Saifur Rahman is the director of the Advanced Research Institute at Virginia Tech, where he is the Joseph Loring Professor in the Bradley Department of Electrical and Computer Engineering. An internationally known researcher in the areas of electrical power, renewable energy, and smart grid, Rahman is the former president and CEO of the Institute of Electrical and Electronics Engineers.
Interview
To schedule an interview with Rahman about balcony solar, email [email protected].
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