Convert daily solar irradiation into equivalent peak sun hours.
Because peak irradiance is defined as 1 kW/m², daily irradiation in kWh/m² is numerically the same as peak sun hours. That identity is what makes the unit so convenient for sizing. Peak sun hours vary from about 2.5 in northern Europe to over 6 in desert regions, which is the single largest determinant of solar output.
Solar Peak Sun Hours
Peak sun hours equal daily irradiation in kWh/m², since peak irradiance is 1 kW/m²
Peak sun hours equal daily irradiation in kWh/m², since peak irradiance is 1 kW/m² Because peak irradiance is defined as 1 kW/m², daily irradiation in kWh/m² is numerically the same as peak sun hours. That identity is what makes the unit so convenient for sizing.
Peak sun hours vary from about 2.5 in northern Europe to over 6 in desert regions, which is the single largest determinant of solar output.
This calculator takes 3 inputs: Daily solar irradiation, System size, System losses. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.