A West Virginia homeowner's rooftop solar delivered some unexpected benefits. Beyond generating electricity, the panels helped keep the attic cooler and alerted them to a failing dehumidifier.
Here's what to know
After a year with the system, the homeowner shared the surprising wins in Reddit's r/SolarDIY community.
The array covers more than half the rooftop, providing shade and creating an air gap that the homeowner credited with keeping the attic cooler.
Over five summer months, the household used roughly 1.7 megawatt-hours less electricity for air conditioning. One commenter calculated that the reduction averaged about 10 kilowatt-hours per day.
The local summer was warmer than average, yet the homeowner reported the savings while keeping the house cooler than before installation.
Residential solar can lower electricity expenses, and some households may save hundreds of dollars per month through $0-upfront solar leases, depending on their circumstances. EasyHome offers a free explorer tool to estimate possible savings and find vetted local installers.
More background
While the panels appeared to help with summer cooling, one commenter asked about their effect during the colder months.
"How will that shade/air gap affect solar gain in the colder months?" they asked.
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Winter sunshine already provided little warmth at the home, in the original poster's view, although they expected the panels to block some of it. They suspected that cooling cost more than heating, since the household heats with natural gas.
Another commenter was more bullish: "Marginal help by adding extra barrier to reduce black body radiation/cooling at night."
A failing dehumidifier also came to light through the solar system's monitoring.
"The Jan-Feb spike in usage was from a dehumidifier that went bad," the OP explained. "Another solar benefit — I caught it months earlier than I would have because of the monitoring."
What can be done?
The homeowner said that they had installed the system knowing the roof would need to be replaced within five years. In their account, inadequate ventilation had allowed excessive heat to damage the roof sheathing.
They couldn't be certain that the cooling would hold up year-over-year, but were optimistic.
"It is only one year, but it was a warmer summer than average where I am, so I think it will hold," they wrote.
For households exploring how to manage electricity costs beyond summer cooling, EasyHome also offers battery storage comparisons. Pairing solar with batteries can help manage costs by storing electricity for later use and can provide backup power during outages, depending on the system's configuration.
Where can I learn more?
Other homeowners have explored solar-powered appliances, combined solar with HVAC upgrades, and put secondhand solar heating panels to use.
• A homesteader's plan to power an isolated shed with solar hit a dehumidifier snag.
• A homeowner asked whether two cheap solar panels could power a window air conditioner.
• A homeowner said solar and a mini-split erased a $100 electric bill while exporting power.
• A DIYer bought 14 secondhand solar heat panels, with 11 still delivering 60,000 BTU an hour.
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