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How Solar Panels Work Even on Cloudy Days
太阳能电池板为何在阴天也能发电
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Solar panels generate electricity from visible light and near-infrared radiation—not just direct sunlight—so diffuse light on cloudy days still activates photovoltaic cells.太阳能电池板不仅能利用直射阳光，还能利用可见光和近红外辐射发电，因此阴天的散射光仍可激活光伏电池。
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Modern panels convert about 18–22% of incoming light into usable power, and their efficiency drops only 10–25% under overcast skies.现代太阳能电池板能将约18%–22%的入射光转化为可用电力，多云天气下效率仅下降10%–25%。
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Rain actually helps performance by washing away dust and pollen that otherwise block photons from reaching the silicon layer.雨水反而有助于提升性能，因为它能冲走积聚在表面的灰尘和花粉，避免这些杂质阻挡光子抵达硅层。
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Tilted mounting and anti-reflective coatings further boost output by capturing scattered light from multiple angles throughout the day.倾斜安装与减反射涂层可进一步提升发电量，全天多角度捕获散射光。
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Battery storage systems allow homes to save excess energy produced at noon for use during evening hours or extended gray periods.储能电池系统可将正午富余电能储存起来，供傍晚或持续阴天时使用。
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Smart inverters adjust voltage and frequency in real time to match grid demands, ensuring stable integration even when solar input fluctuates.智能逆变器能实时调节电压与频率以匹配电网需求，确保即使光伏发电波动也能稳定并网。
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In cities like Hamburg and Vancouver, where clouds dominate eight months a year, rooftop solar still supplies over 30% of residential daytime electricity.在汉堡、温哥华等一年中八个月阴云密布的城市，屋顶太阳能仍能满足居民白天30%以上的用电需求。
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Ongoing research focuses on perovskite materials that absorb broader light spectra, promising higher yields under low-light and indoor conditions.当前研究聚焦于钙钛矿材料，其可吸收更宽光谱，有望显著提升弱光及室内环境下的发电效率。