"Does solar panel work on cloudy day?"

Posted: June 3, 2021,

Does solar panel work on cloudy day?

Solar panels do generate electricity on cloudy days– they just do not perform as well as they would on a bright sunny day. Though estimates range, solar panels will generate about 20-40% of their normal power output on a cloudy day.

Real life example:

Here is the Actual electricity generated data from 3kw rooftop solar system which we had installed.





There is a strong correlation between hours of clear sky and electricity generated. You can see that in the above chart. As on 1st of April there was 9:30 hr of clear sky, where the rooftop solar generated 15kWh of electricity (i.e. 5 times the installed capacity). Where as on the 4th April rooftop solar generated 6kW of electricity even though there was only 1:30 hr of clear sky the whole day. By this we can infer that solar panels can generate some electricity even when its cloudy or rainy.