Before installing solar panel racking system on your roof, you need to considering the things.
1. Utilization area: Firstly, determine how much available area the roof has. Because the available area directly determines the installed capacity of the photovoltaic system. Secondly, the orientation of the roof. The roof is best to face south. Because we are in the northern hemisphere, when facing south, the power generation is the highest. It can also be a little bit east or west, generally within a few degrees or about 10 degrees.
2. Shading: Shading is very critical to the solar power generation system. Shading includes the occlusion of buildings, and whether there are tall trees around the buildings that affect day lighting
3. Waterproof: To judge the waterproof condition of the roof is to see whether the roof has a very good waterproof layer. If the building does not have a good waterproof system, the roof may not be able to meet the function of the roof during its life cycle.
4. Load-bearing: the photovoltaic system must be built on the roof. If the roof's carrying capacity cannot meet the photovoltaic construction, this project will not be established.