According to the differences in design, construction, and installation methods, the distributed photovoltaic power station business can be divided into BAPV (Building Applied Photovoltaics) and BIPV (Building Integrated Photovoltaics). Both methods use rooftop to develop distributed photovoltaic power stations to generate photovoltaic power.

Industrial and commercial distributed photovoltaics can be divided into the “all generation to the grid” mode and the “self-consumption first and the excess to the grid” mode according to different consumption modes. The company focuses on the investment and operation of industrial and commercial distributed photovoltaic power stations of the “self-consumption first and the excess to the grid” mode and obtains stable power generation income by selling the power generated by photovoltaic power stations. According to the principle of “self-consumption first and the excess to the grid”, the company signs energy management contracts with the owners of roof resources. After power stations are completed and put into operation, the company will prioritize the owners of rooftop resources based on their electricity needs and give them discounts on the electricity price or pay certain rental fees. If there is still residual electricity after the power generated by the power station is consumed by roof resource owners, the residual electricity will be fully connected to the grid.

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• Technical data related to social benefits of photovoltaic power stations

• Installation capacity： 10000m2≈1MWp	Annual power output： 1MWp ≈ 1 million KWH/year
  Annual savings of standard coal ≈360 tons	Annual emission reduction： CO2≈1000 tons ，SO2≈30 tons Oxynitrides≈15 tons
  On-grid mode Self-consumption first and surplus to the grid	High voltage power distribution cabinets: High-voltage supply and high-voltage metering (middle-placed switch cabinet, loop grid cabinet) Low metering
  On-grid types High voltage on-grid (10KV, 20KV, 35KV, and 110KV), low voltage on-grid (380V)

Benefits to enterprises of installing photovoltaic power generation systems

BAPV refers to the solar photovoltaic power generation system attached to buildings, whose main function is to generate electricity without affecting the function of buildings. BAPV does not destroy or weaken the functions of the original building.

Perfect integration of photovoltaic power and architecture

Building integrated photovoltaics opens a new era of architecture

BIPV refers to a photovoltaic power generation system simultaneously designed, constructed, and installed as the building and is perfectly integrated with the building. As a part of the external structure of the building, it not only has the function of power generation, but also has the function of building components and building materials, and can even enhance the beauty of the building and form a perfect unity with the building.

• Overall structure of Sunoren rooftop BIPV system

  

• Technical solutions for rooftop installation

  
  

  Color steel roof: Connected with color steel through special fixtures without damaging the original roof structure.

  Concrete roof: Guiding gutter support is connected to the roof through chemical anchor bolts and the connection is coated with outdoor waterproof sealant.

  The main guiding gutter is fixed on the guiding gutter stand.

  
  

  

  
  

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  Save construction costs

  
  

  Color steel roof: Color steel tiles, thermal insulation cotton, and color steel tiles or steel wire mesh are needed to be laid in the upper, middle, and lower layers respectively for traditional color steel roofs at the cost of approx. 100 yuan/m2. However, the BIPV system structure only needs to lay a layer of thin color steel tiles and the cost is only about 50 yuan/m². 500,000 yuan can be saved for each 10,000 m².

  Concrete roof: To prevent the roof from aging and water leakage, a layer of waterproof rolls is laid on the surface of the traditional concrete roof, and the cost is about 25 yuan/m². Adoption of the BIPV system structure can save this procedure, saving about 250,000 yuan per 10,000 m².

  
  

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  Double waterproofing effect

  
  

  The Sunoren rooftop BIPV system is composed of longitudinal main guiding gutters and transverse secondary guiding gutters. When it rains, rainwater flows through the photovoltaic panels and is discharged to the gutter along the main and secondary guiding gutters to achieve double waterproofing effects.

  
  

  

Comparison of electricity costs (assuming that the electricity price of the power supply company is 1 yuan/kWh and the user’s annual electricity consumption is 8 million kWh)

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  Existing electricity consumption

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  Electricity consumption after the photovoltaic system is installed