Mono Solar Panel

How Many Kilowatts (KW) of Solar Power Station can be Installed on Your Rooftop

2018-07-12 17:36:12
In fact, how much PV system can be installed, how much capacity is designed, as the idiom says, "tailoring", first measure the body's high and thin fat index, and then determine whether the size of the clothes fits according to this index. The same is true for the design and installation of a home PV plant. To install a PV plant on its own roof, the first constraint is how many PV modules are placed in the identified unobstructed area. Rooftop Solar Power Station,Mono solar panel

During the actual installation and construction process, the roof should be significantly larger than the required area of the photovoltaic array, mainly affected by the presence of protruding parts or prominent objects on the roof. A key factor here is the effective area. There are generally three types of roofs for installing photovoltaic power: color steel roofs, brick roofs, and flat concrete roofs. Different roofs, photovoltaic power plants are installed in different ways, and the installed power plant area is different.(taking a crystalline silicon component as an example)

1. color steel tile roof
PV power plants are installed on steel roofs of steel structures. Usually, PV modules are installed on the south-facing side, and the proportion of 1 kW is 10 square meters, which is 1 MW (1 MW = 1000 kW). Need to use 10,000 square meters of area.

2. brick structure roof
Installation of photovoltaic power plants on brick-and-tile roofs will generally be carried out in the uncovered area of the roof from 08:00 to 16:00. Although the installation method is different from that of the color steel roof, the laying ratio is similar, which is also the area of 1 kilowatt. About 10 square meters. That is to say, a brick-and-mortar roof with a relatively large area (100-150 square meters) can install about 10 kilowatts of photovoltaic power generation system. The average annual power generation in 25 years is estimated to be 9,000-13,000 degrees.

3. flat concrete roof
In the installation of photovoltaic power plants on flat roofs, in order to ensure that the components receive sunlight as much as possible, it is necessary to design an optimum horizontal inclination. Therefore, a certain spacing is required between each row of components to ensure that they are not blocked by the shadows of the front row components. Therefore, the roof area occupied by the entire project will be larger than the color steel tile and villa roof that can realize the flattening of the components.Generally speaking, considering the complicated factors such as natural occlusion and wall height, the 1 kW occupied roof area is about 15~20 square meters, that is, the 1 MW project needs to use 1.5~20,000 square meters.

4. How to measure the effective space of the roof
In the process of PV array design and component selection, the effective area is extremely important. Let us say, what are the measurement tips for the effective area of the roof? How to master these tips? Let your own PV system design and installation more scientific and reasonable.

Measurements can be made using a tape measure or 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 the length.

5. determine the "edge area"
Depending on the installation method chosen, a border or "edge area" should be left in advance around the eaves. If the reserved space in the edge area is too small, it will cause inconvenience to construction and maintenance. If the marginal area is too large, it will reduce the effective area of the roof and affect the design of the photovoltaic system. For such a special parameter, the place generally has its size specified. In Australia, where photovoltaic power generation started earlier, it is recommended to select 20% of the effective area for the “edge area”.

6. Determine the maximum number of PV modules that can be installed in the effective area.
Everyone knows that the commonly used PV modules are rectangular. They have two fixed latitudes: length and width. The actual number of PV modules that can be mounted on the roof is mainly affected by the two fixed latitudes and the effective space length and width of the roof. In general, PV arrays can be landscape-mounted according to the direction and effective area of the roof (long side parallel to the long side of the roof) or portrait-style (long side parallel to the wide side of the roof).

7. irregular roof can be divided
In the countryside, the roof is complex and diverse. Not all roofs are rectangles we are looking forward to. If the roof you are facing is a non-rectangular area, don't panic. You can use the segmentation method to divide the roof into several rectangles and then follow Landscape installation and portrait style for installation.
Understand this, rationally use and create the effective area of the roof to maximize benefits!
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