What are peak sun hours?
They express daily solar irradiation as equivalent hours at 1,000 W/m².
MAXScanner calculator
Solar Panel Output Calculator — Daily & Monthly Energy Estimate
Estimate daily and monthly solar energy from array watts, peak-sun-hours and an explicit system-efficiency percentage.
Result
20 kWh/day
608.75 kWh average month
5,000 W array · 5 peak-sun-hours · 80% system efficiency
Formula and worked example
daily kWh=array watts×peak sun hours×efficiency/1000; monthly= daily×30.4375.
A 5,000 W array, 5 peak-sun-hours and 80% system efficiency estimates 20 kWh/day.
Assumptions
- Peak sun hours are an energy-equivalent input, not daylight duration.
- Shading, weather, orientation, temperature and inverter clipping are represented only through your inputs.
Last updated: 2026-09-16
Frequently asked questions
Is this a financial forecast?
No. It estimates energy only and does not predict tariffs, incentives or savings.