The Solar Lab
But contrary to popular belief, solar panels can generate power year-round, even on some of the cloudiest and snowiest of days. To prove this fact, we went outside to do some solar
To determine whether a photovoltaic system can generate power on cloudy days, it's essential to understand the source of its energy. Solar panels rely on photons—not the heat or intensity of sunlight.
Solar panels work on cloudy days, but their efficiency decreases. On average, they produce 10% to 25% of their normal energy output under overcast conditions. While this might seem like a significant drop, solar panels don't require direct sunlight—they can still generate electricity from diffused sunlight that passes through the clouds.
One of the 200W solar panels, now more strategically angled against the side of the house to capture more sunlight, was able to pull in 120 to 150 watts, a major improvement from the 40 to 47 watts we saw on the cloudy day. For comparison, in the middle of summer with the same setup, these panels can typically produce around 180 to 185 watts.
But contrary to popular belief, solar panels can generate power year-round, even on some of the cloudiest and snowiest of days. To prove this fact, we went outside to do some solar experiments on a really cloudy day right after a major snowfall. Want to discover the results of our real-world testing, keep reading!
PDF version includes complete article with source references.
Get technical specifications, application guides, and ROI analysis tools for containerized power stations, portable photovoltaic containers, and microgrid energy storage solutions.
18 Industrial Park Road, Midrand
Johannesburg, South Africa 1685
Sales & General: +27 11 568 3400
Technical Support: +27 82 459 7781
Monday - Friday: 8:00 AM - 6:00 PM SAST
Saturday: 8:00 AM - 2:00 PM SAST