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How solar panels perform when the sky darkens

How solar panels perform when the sky darkens
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As clouds obscure the sun and darken the sky, solar homeowners often wonder about the energy production of their solar systems on cloudy days. This article explores the impact of clouds on solar panels, shedding light on efficiency variations and the role of factors like partial shading.

Contrary to common belief, solar panels do function on cloudy days, albeit with reduced power output. The extent of this reduction depends on the quality and efficiency of the installed solar panels. Clouds, while blocking direct sunlight, don't fully impede solar radiation, allowing panels to generate electricity at efficiency levels ranging from 10 to 25 percent compared to sunny days.

Solar photovoltaic (PV) panels convert sunlight into direct current (DC), subsequently transformed into alternating current (AC) by an inverter. Excess AC power on sunny days can be fed back into the grid, credited to homeowners through net metering policies.

Net metering, regulated at the state level, enables homeowners to manage fluctuating energy production. Excess electricity during sunny periods is credited back to the grid, creating a surplus for use during low-production periods like cloudy days or nighttime. This approach ensures a consistent and reliable energy supply.

Efficiency on cloudy days isn't negated; rather, it's influenced by factors like cloud cover and panel quality. Solar panels continue to harness solar radiation even in diffuse light, and understanding this interaction, along with net metering policies, empowers homeowners to maximize the benefits of their solar systems. As technology advances, the impact of clouds on solar energy generation may decrease, offering more resilient and efficient renewable energy solutions.

Next time we wii tell you facts about solar panels and cloudy weather as a continue of this article.
See you soon.


Text and photo based on: us.sunpower.com
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