If you want to install a photovoltaic system on your own roof, you must first know how many photovoltaic modules can be placed in an unshaded area.
In the actual installation process, the roof is larger than the area required by the photovoltaic array, which is mainly affected by the objects on the roof. One of the key factors is usable area.
In the process of photovoltaic array planning and module selection, the effective area is extremely important. Today we will talk about the measurement tips for the effective area of the roof, and how to master these tips? Make your own photovoltaic system planning and installation more scientific and reasonable.
Tip 1. How to measure the useful space of the roof?
When measuring, you can use a tape measure to measure or get it directly from the structure of the building. For example, the distance between the eaves and the ridge is defined as "width", and the horizontal distance along the eaves is defined as length.
The second trick is to determine the "marginal area".
Here, depending on the installation method chosen, a gap or "marginal area" should be left in advance around the eaves. If the reserved space in the marginal area is too small, it will bring inconvenience to the construction and protection later. If the space in the marginal area is too large, it will reduce the effective area of the roof and affect the size of the photovoltaic system. For this special parameter, the local area usually has regulations on its scale. In Australia, where photovoltaic power generation started relatively early, it is recommended to select 20% of the effective area for the "marginal area".
Tip 3: Determine the maximum number of photovoltaic modules that can be installed within the useful area.
Everyone knows that commonly used photovoltaic modules are rectangular, and it has two fixed latitudes: length and width. Influence. Under normal circumstances, the photovoltaic array can be installed in a landscape style (long side parallel to the long side of the roof) or in a portrait style (long side parallel to the wide side of the roof) according to the direction of the roof and the effective area.
Tip 4. The division method can be used on irregular roofs to find out the effective space suitable for installing photovoltaic systems