Solar Insolation Calculator

Solar insolation refers to the amount of solar energy received per unit area over a specific time period, typically measured in kilowatt hours per square meter per day (kWh/m²/day). It's different from irradiance, which is the instantaneous solar power.

Panel tilt angle significantly impacts solar energy collection. Panels tilted at an angle equal to your latitude typically maximize annual energy production. Our calculator accounts for tilt angle to provide more accurate estimates.

Real-world factors like dust, debris, dirt, temperature inefficiency, panel aging, and inverter losses typically reduce output by 10-25%. Our calculator includes a system losses field to account for these factors.

Peak sun hours calculations are based on long-term weather data and solar position equations. While quite accurate for planning purposes, actual daily values will vary due to weather conditions, seasonal variations, and local atmospheric conditions.

Peak sun hours represent the equivalent number of hours at 1000 W/m² solar irradiance. A location might have 12 hours of daylight but only 5-6 peak sun hours due to varying solar intensity throughout the day.

Enter your location coordinates, desired installation month, panel area, and efficiency. The calculator provides daily and monthly energy estimates to help size your solar system based on your energy needs.

Yes, solar panels lose efficiency as temperature increases, typically 0.3-0.5% per degree Celsius above 25°C. Include temperature losses in the system losses field for more accurate calculations in hot climates.

Solar insolation varies seasonally, so calculate for different months to understand year-round performance. For system design, calculate the worst-case month (typically winter) to ensure adequate energy production year-round.