How do I use the Solar Panel Yield Estimator?

Enter your system parameters into the calculator fields on the left and click "Calculate". The results will appear instantly on the right, showing you the recommended values for your off-grid energy system.

Is the Solar Panel Yield Estimator free to use?

Yes, all tools and calculators on Off Grid Genie are completely free. They are designed to help you plan and optimise your off-grid energy system.

Solar Panel Yield Estimator

Estimate the energy output from your solar panels at any UK location. Get seasonal breakdowns and recommended MPPT charge controllers.

Enter Your Values

Panel Wattage (W)

Number of Panels

UK Location

Panel Angle from Horizontal

System Voltage

Results

Enter your values and click Calculate to see results.

How Solar Yield is Estimated

Solar yield depends on your location (solar irradiance), panel wattage, orientation, and system efficiency. We use average UK solar irradiance data measured in kWh/m²/day (also called Peak Sun Hours).

Daily Yield = Panel Wattage × Number of Panels × Peak Sun Hours × System Efficiency / 1000

We apply a 0.85 system efficiency factor to account for losses from wiring, charge controller conversion, temperature, and shading.