How much energy does a solar panel produce?


If you are looking to power your home through solar methods, you might want to use some part of your roof for installing a solar PV system.

But, how many solar panels should you install to suffice your energy requirement? A common question we are asked, but the answer varies according to the energy consumed by each user.

By determining how much energy your solar panel is capable of producing, we can help you clarify your requirements.

Factors affecting solar panel power output per day:

Solar panels generate power from the sunlight and not from the heat of the sun. The amount of power the solar panel can generate i.e. the solar panel output per day depends on the following factors:-

  • Type of solar panel: There are two important types of solar PV panels available – Crystalline Silicone (C-Si) modules and Thin film modules. Crystalline Silicone modules are known to be 13-19% efficient, while Thin Film modules have an efficiency rate of 4-12%. Read more about efficiency of solar panels.


  • Solar radiation: The amount of sunlight incident on a particular region and the duration for which it is available also determines the output power from the solar panels. In the tropical areas, one can expect the average sun hours for 5 hours a day, and radiation to be up to 6.0 kWh per square meter area.


  • Design of the solar plant: This is an important factor because the design determines the actual area of the solar panel exposed to light. A typical 60 cells solar panel covers around 1.6 square meter area. Solar energy companies perform shadow analysis as part of cost and benefit analysis. It might just happen that you have ample of open space for solar panel installation, but the environmental factors may render some area unusable for this purpose. Best is to engage with a reliable solar energy company for site survey.


  • Environmental factors: The seasonal changes can affect the output of the solar panel.


For example, based on the above facts, in a day, a solar panel of 60 cells configuration is capable of producing the power as calculated-

Hours of incident light * efficiency of solar panel * area exposed to sun * amount of solar radiation = Output power

Hence, the output power from a residential solar panel in a day would look like this:

5 hours * 14 percent * 1.6 square meter * 6.0 kWh/m2 = 6.7 KW


The amount of electricity that a solar panel can produce, not only depends on the intensity of the sunlight and the duration for which it is exposed to the sun, but also on the solar panel efficiency, solar panel size, and the amount of sunlight directly incident on the panels.

Solar panel kWh calculator

The above section indicated how much power a solar panel can produce on an average. To get the calculation for actual solar power that can be generated on your premises, you can either calculate manually by reading the configuration of the equipment based on the above formula, or you can simply use our solar calculator.

However, using solar power calculator can assure more reliable calculation, as it uses the real time data for solar radiation on a particular region.

How many kWh does a solar panel produce per day?

In a day, a solar panel can produce enough power to light up to nine 60 Watt light bulbs (considering lighting the bulb for 12 hours).

Note: The above compilation is an overview of how much energy a solar PV system can produce. The practical statistics may vary according to the weather conditions, shadow area, and the solar panel efficiency.


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1 Comment

  1. Christian Morales November 21, 2017

    Thank for the useful information. At least, I have an idea on how to compute the kwh produced by Solar Panel everyday.

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