The latitude is an indicator of when the sunrises and sunsets and certain times of the year. If you live near the equator with a latitude of near zero, the sun will rise and set close to the same time all year resulting in consistent total sunlight hours per day. If you live near the poles, the time of sunrise and sunset will vary dramatically with each season, resulting in long days for part of the year and very short days at other times. So, locations closer to the equator will have more consistent amounts of peak sun hours throughout the year than locations closer to the poles.
They type of solar panel you use has an affect on the average peak sunlight hours. Some panels allow for movement, so they can track the sun as it rises in the east and sets in the west, or as the seasons change and the sun's path changes. A fixed panel remains fixed and does not have the ability to rotate, whereas a 1-axis and 2-axis panel can adjust with the sun.
Thanks @Osama Bahnas.....I got the explanation but as in data what is an average PSH across the temperate zone?
1) Horizontal: 4.62
2) Dual axis tracking: 5.62
3) Tilted at Latitude angle: 5.53
From SolarEnergyLocal.com
My mistake, those numbers are for Madrid, Ne and you likely want the numbers for Madrid, Esp.
I believe you can find the answer right here on ResearchGate:
https://www.researchgate.net/publication/233482779_Solar_radiation_in_Madrid
Table 2 shows monthly results on a horizontal surface. Figure 2 shows results based on tilted surfaces
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