Solar Production Calculator

Solar Production Calculator

Welcome to the Solar Production Calculator! This tool helps you estimate the energy production of your solar panel system. By providing a few key details, you can get a clear picture of the potential energy output from your solar panels.

How It Works

The calculator considers the following factors:

  1. System Size (kW): The size of your solar panel system, measured in kilowatts (kW). This is the total capacity of your solar panels.
  2. Average Sunlight Hours per Day: The average number of hours per day that your solar panels receive direct sunlight. This can vary based on your location and the time of year.
  3. System Efficiency (%): Your solar panel system’s efficiency is a percentage. This accounts for panel quality, inverter efficiency, and system losses.


  1. System Size (kW)
    • Enter the total capacity of your solar panel system. Your solar installer usually provides this information, which can also be found in your system specifications.
  2. Average Sunlight Hours/Day
    • Enter the average number of hours your location receives sunlight per day. You can find this information from local weather services or solar data sources.
  3. System Efficiency (%)
    • Enter your system’s efficiency. This percentage value represents how effectively your system converts sunlight into electricity. Typical values range from 15% to 20%.


The calculator uses the following formula to estimate your solar production:

[ \text{Daily Production (kWh)} = \text{System Size (kW)} \times \text{Sunlight Hours/Day} \times \left(\frac{\text{Efficiency}}{100}\right) ]

To estimate the monthly production, we assume an average of 30 days in a month:

[ \text{Monthly Production (kWh)} = \text{Daily Production (kWh)} \times 30 ]

Example Calculation

Let’s say you have a 5 kW solar panel system, your location receives an average of 5 hours of sunlight per day, and your system efficiency is 18%.

  1. System Size: 5 kW
  2. Sunlight Hours/Day: 5 hours
  3. Efficiency: 18%

Using the formula:

[ \text{Daily Production} = 5 \times 5 \times \left(\frac{18}{100}\right) = 4.5 \text{ kWh/day} ]

[ \text{Monthly Production} = 4.5 \times 30 = 135 \text{ kWh/month} ]

Using the Calculator

  1. Enter your system size in kW.
  2. Enter the average number of sunlight hours your location receives per day.
  3. Enter the efficiency of your solar panel system.
  4. Click the “Calculate” button to see your estimated monthly production.


The results will provide an estimated monthly kilowatt-hours (kWh) energy production. This can help you understand the potential savings on your electricity bill and the environmental benefits of your solar panel system.


The Solar Production Calculator is a simple yet powerful tool to estimate the energy output of your solar panel system. By understanding your system’s potential, you can make informed decisions about your energy needs and the benefits of solar energy. Try it now and see how much energy you can produce with solar panels!

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