Peak Sun Hours Calculator

The only tool in Pakistan that accurately calculates peak sun hours using your specific location. Powered by up-to-date data from PMD, including peak sun hours by month and location.

Frequently Asked Questions

1. How does this calculator measure peak sun hours?

This calculator uses solar irradiation data for each city, sourced from the Pakistan Meteorological Department. It then puts this value in the formula to calculate peak sun hours.

2. What is the formula to calculate peak sun hours?

Peak sun hours are calculated by measuring the total solar radiation received in a day and dividing it by 1,000 watts per square meter.

3. What is 1 peak sun hour?

One peak sun hour equals 1,000 watts of solar energy per square meter in one hour.

4. What are the peak sun hours in Karachi, Lahore, and Islamabad?

The exact PSH comes from the Peak Sun Hours Calculator, but on average, Karachi receives 5.8, Lahore 5.2, and Islamabad 4.9 hours per day, depending on the season.

5. How are sunshine hours measured?

Sunshine hours are measured using a sunshine recorder, which tracks the duration of direct sunlight in a day.