FREE · CALCULATORS & CONVERTERS
Solar Output Calculator.
Estimate daily, monthly and yearly energy from panel watts, panel count, peak sun hours and a loss percent.
Peak sun hours and the loss percent are the values you enter. There is no climate database and no yield guarantee. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
- Array power
- 4 kW
- Daily energy
- 16 kWh
- Monthly energy
- 480 kWh
- Yearly energy
- 5,840 kWh
Daily energy = panel watts × panel count × peak sun hours × (1 − loss) / 1,000. Peak sun hours and the loss percent are the values you enter. This is not a site survey or a yield guarantee.
How to use Solar Output Calculator
Enter the nameplate watts, how many panels, the peak sun hours for the site and a loss percent for heat, dirt and the inverter.
How it works
Estimate daily, monthly and yearly energy from panel watts, panel count, peak sun hours and a loss percent. Peak sun hours and the loss percent are the values you enter. There is no climate database and no yield guarantee. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
Example
Ten 400 W panels, 5 peak sun hours and 20% loss.
Questions about Solar Output Calculator
Is Solar Output Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Peak sun hours and the loss percent are the values you enter. There is no climate database and no yield guarantee. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.