How Does Rain Affect Solar Panel Electricity Generation?
In what has become a depressingly familiar sight this year today has been another wet day. This summer has been quoted as the wettest since records began with April and June having more rain that any month since 1910. Fortunately not as wet as some parts of the country with a month's worth of rain falling in a few hours but sunshine and showers meaning yet again our solar panels have not been generating at their maximum that we would expect for the summer.
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| How Does Rain Affect Solar Panel Electricity Generation? |
On a day like today though with mixed sunshine and showers the amount generated is not so bad and can equate to around 50% of the electricity you would generate on a sunny day, with around 10kWh generated today.
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| Peak electricity generation during mixed sun and rain |
In fact on a rainy day with mixed sun and rain the peak generation can actually be far higher than the peak on a sunny day as the panels get cooled down by the rain so the immediately hit their maximum when the sun does come out. On a sunny day the peak output can be around 2.5kW but on a mixed day just after a rainy spell the peak can jump to as high as 3kW when the panels are cool.
This link explains how temperature affects the electricity output of solar panels
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