How Many kWh Does A Solar Panel Produce?

Mitchell Shearston
Cyanergy
Published in
2 min readMar 5, 2021

In today’s blog, I am going to explore one of the most frequently searched questions “how many kWh does a solar panel produce?” using some of the mathematical equations.

So, let’s dive into the topic. Shall we?

A 100 watts solar panel means that it can produce 100 watts of power from one-hour sunlight. Therefore, you will get 100 watts hourly from a 300 watts solar panel theoretically. But, the irony is that a solar panel is a maximum of 15–22% efficient, depending on brands, weather, and geological conditions.

Now,

Let’s consider, we will get 8 hours of proper sunlight without the disturbance of shadow, and the solar panel is 20% efficient. Besides, we have a 300 watts solar panel.

Now, it’s time to calculate how many kWh a solar panel does produce:

Watts from 300 watts solar panel = 300 x 8

= 2400 Watts

Now, calculate the amount at 20% efficiency level:

20% of 2400 watts = 2400 x 20%

= 480 Watts

In Conclusion,

It has been derived from the above equations that if you have a 300 watts solar panel, you will get about 480 Watts from 8-hours sunlight with a 20% efficiency level without experiencing any disturbance of shadow.

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Mitchell Shearston
Cyanergy

Solar Expert, Freelance Writer. Web Junkie . Gardening Geek