Your inputs
Editable example valuesYour estimate
Live calculationPeak sun hours
5 h/day
Daily solar irradiation
5 kWh/m²/day
Planning estimates, not equipment approval. Review the assumptions below before choosing a system.
No location or tariff is detected automatically. All results use the values you enter.
What is this tool used for?
Peak sun hours describe solar energy, not the length of the day. NASA POWER monthly averages are for a horizontal surface, not your tilted roof; they are historical estimates, not a weather forecast.
How this is calculated
PSH = H ÷ 1 kW/m²; H = Daily solar irradiation
Before you use the result
Peak sun hours describe solar energy, not the length of the day. NASA POWER monthly averages are for a horizontal surface, not your tilted roof; they are historical estimates, not a weather forecast.
Tool guide
Peak sun hours describe solar energy, not the length of the day. NASA POWER monthly averages are for a horizontal surface, not your tilted roof; they are historical estimates, not a weather forecast.