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Because now on the market of photovoltaic power generation in three categories:
1. Amorphous silicon photovoltaic modules;
2. Polycrystalline silicon photovoltaic modules;
3. Monocrystalline silicon photovoltaic modules, but also the core components of photovoltaic power generation.
01, amorphous silicon PV modules only 78W per square, the smallest only about 50W.
Features: Large area, more fragile, low conversion efficiency, unsafe transportation, decay much faster, but weak light better. As shown below:
02, polysilicon PV modules per square meter of power is now more common on the market 250W, 255W, 260W, 265W.
Characteristics: slow decay, long service life relative to the price of monocrystalline silicon photovoltaic modules have advantages, but also on the market now more of a. As shown below:
03, monocrystalline silicon PV modules on the market common power 260W, 265W, 270W, 275W area is 1.63 square meters.
Features: Relative to the same area of polysilicon conversion efficiency slightly higher, of course, the cost is higher than the cost of polycrystalline silicon photovoltaic modules, life and polycrystalline silicon photovoltaic modules are basically the same. As shown below:
After some analysis we should understand the size of a variety of photovoltaic modules. However, the installed capacity of the roof area is also a great relationship, if you want to calculate how much their own roof can be installed on the system, we must first understand their own roof belongs to what type.
Roof type
There are three types of roofs for photovoltaic power generation: color steel roof, brick roof, flat concrete roof. Different roofs, different installation of photovoltaic power plants, installed power plant area is also different.
Caigang tile roof
Photovoltaic power plants are installed on steel-clad steel-roofed steel roofs. PV modules are usually installed on the south-facing side with a laying area of 10m 2 for 1 kilowatt, ie 1 MW (1 MW = 1000 kW) Need to use 10,000 square meters area.
Brick roof structure
The installation of photovoltaic power plants on the roof of brick and tile structures is generally covered by the unoccupied roof area covered by PV modules from 08: 00-16: 00. Although the installation method is different from that of Caigang roofs, the laying ratio is similar to that of 1 kW About 10 square meters.
Flat concrete roof
Installing photovoltaic power plants on a flat roof requires that the assembly be designed to have the best horizontal tilt in order to receive as much sunlight as possible. Therefore, intervals between the rows of components need to be spaced to ensure that they are not obscured by the shadow of the front components. As a result, the total area occupied by the project will be larger than the color steel tile and the roof of the house where the components can be laid.
Home improvement is not worth planning, can install?
PV power generation projects are now strongly supported by the state, and give the corresponding policy users once per hair grant subsidies 0.42 yuan, the subsidies for 20 years. All localities may have subsidies here. Please refer to the local power bureau for specific subsidy policies. As long as the use of property rights to the vicinity of buildings or buildings can be installed, and apply for no fee.
