The National Energy Administration proposed in the "Thirteenth Five-Year Plan for Solar Energy Development" (hereinafter referred to as the "Plan") that it will vigorously promote rooftop distributed photovoltaic power generation and continue to carry out the construction of distributed photovoltaic power generation application demonstration areas. Obviously, rooftop distributed photovoltaic will become an important direction for the future development of photovoltaics.

As we all know, the roofs of enterprise factories have always been the darling of the photovoltaic industry. Using idle factory roofs to build photovoltaic projects can not only reduce energy consumption, but also make full use of idle resources, play a role in energy conservation and emission reduction, and bring huge economic and environmental benefits to the factory. It can be said to kill two birds with one stone!

Introduction to distributed photovoltaic power generation on industrial and commercial roofs

The basic equipment of the distributed photovoltaic power generation system on the factory roof includes solar photovoltaic cell modules, photovoltaic array brackets, DC junction boxes, DC distribution cabinets, grid-connected inverters, transformers, AC distribution cabinets and other equipment, as well as power supply system monitoring devices and environmental monitoring devices.

Its operating mode is that under the condition of solar radiation, the solar cell module array of the photovoltaic power generation system converts the output electricity of solar energy into electricity, which is sent to the DC distribution cabinet through the DC junction box, and then converted into AC power by the grid-connected inverter to supply the building's own load. The excess or insufficient electricity is adjusted by connecting to the grid.

The diagram of the distributed photovoltaic power supply system on the industrial and commercial roof is as follows:

Six benefits of photovoltaic power generation

1. Solar energy is inexhaustible. The solar radiation received by the earth's surface can meet 10,000 times the global energy demand! (As long as solar photovoltaic systems are installed on 4% of the world's deserts, the electricity generated can meet the global needs!)

2. Solar power generation is safe and reliable, and will not be affected by energy crises or unstable fuel markets.

3. Solar energy can be found everywhere and can be used for power nearby. It does not need to be transported over long distances, which avoids the loss of long-distance transmission lines; the sun does not use fuel and has very low operating costs.

4. Solar power generation has no moving parts, is not easy to damage, and is simple to maintain. It is particularly suitable for use in unattended situations.

5. Solar power generation does not produce any pollution, noise or other public hazards, has no adverse effects on the environment, and is an ideal clean energy source.

6. The construction period of the solar power generation system is short, convenient and flexible, and the number of solar arrays can be added or reduced at will according to the increase or decrease of load to avoid waste.

Eight advantages of industrial rooftop photovoltaic power generation

1. Utilize idle rooftops to activate fixed assets and increase corporate profits and added value.

2. Save peak electricity charges for enterprises (peak power generation is the highest during the day), and the surplus electricity can be sold online.

3. Reduce the temperature inside the factory, increase working comfort, warm in winter and cool in summer.

4. It can better complete the energy conservation and emission reduction indicators stipulated by the government.

5. It is not limited by the distribution of resources, and it is safe and reliable, noiseless and pollution-free by taking advantage of the building roof.

6. Adopt the nearest user side access, no need for long-distance transportation, and avoid the loss of long-distance transmission lines.

7. The construction period of the solar power generation system is short, the time spent on obtaining energy is short, and it is convenient and flexible. According to the increase or decrease of load, the solar array can be added or reduced at will to avoid waste.

8. Good investment returns, can operate for at least 25 years. No fuel is required, the operating cost is low, and it is not easy to generate polluting waste during the power generation process. It is an ideal clean energy.