The best direction of photovoltaic solar panels
The direction and inclination of the solar mounting system have a great influence on the power generated by photovoltaic.
Understand the ideal orientation and inclination of photovoltaic solar panels. We can also find out the change of power generation of photovoltaic solar panels in different positions.
What is the best direction for photovoltaic solar panels?
In Brazil, the best direction for photovoltaic solar panels is to face north. In the southern hemisphere, the sun rises in the East, rises in the north, and sets in the west, as shown in the figure below: the ideal direction of Brazilian solar panels is to face the solar panels north
So, if you have a north facing roof and this part of the roof has no shadow, you should install your photovoltaic panels on this side. So your solar power generation opportunities generate more energy.
For grid connected PV system, the tilt angle equal to latitude is usually the best angle to install PV panels. For example, Rio de Janeiro has latitude 22 °， Therefore, the best position of PV panel in RJ is: 22 in the north °。 For those who don't have a north facing roof, don't worry! If the system is installed on the East and west sides, the loss of photovoltaic solar power generation will not be so great
The directional loss of NE or no towards the roof varies from 3% to 8%.
For roofs that face east or west, you may lose 12% to 20%.
On the south side, the losses are very large. If you live in northern Brazil, consider installing only this part of the roof.
Tip:
In Brazil, because of its superior position relative to the sun, the inclination of photovoltaic system is better lower than latitude and higher than latitude. For example, if your property is located in Sao Paulo (latitude about 23 degrees) °）， Your house has two north facing Roofs: the first one is very steep, with an inclination of about 32 degrees °。 The second roof is flatter, with an inclination of about 10 °。 If you have to choose between the two, the one with a slope less than latitude should generate more power.
In fact, your installers have to know exactly which location is best for your PV system. He must be able to inform you of the energy loss based on the direction, inclination and geographical location of Brazil.
Why is it important to know the direction of solar panels?
The direction of solar panels is very important in energy collection, so using the correct direction of solar panels can make your solar project cost less resources and time to complete, and improve the efficiency of solar panels.
