More and more people are building household distributed photovoltaic power plants, but the electricity generated by the same installed capacity also has high and low; so how can we effectively increase the power generation on their roofs?
First, let's take a look at what factors affect solar power generation.
1. Lighting conditions: The use of solar power for domestic solar power stations, the better the natural light resources, the greater the power generation; in areas with the same lighting conditions, after preliminary measurement and design, the power station set at the optimal tilt angle has a power generation ratio After preliminary measurement and design, the power station installed at the optimal tilt angle is significantly higher
2. Product quality:
â‘ Component quality. Photovoltaic modules with good quality and high conversion rate will naturally generate more electricity.
â‘¡Inverter quality. The conversion efficiency of a good-quality inverter is high, and the natural output power generation will be higher.
3. Installation quality: professional and reliable installation services can ensure that the installation is strictly in accordance with the optimal inclination of the components, will not damage the product components, and will not cause potential construction hazards, thereby avoiding subsequent safety problems such as electrical leakage, fire, and lightning strikes . Unprofessional installation may damage parts of the product and even cause safety problems.
4. Daily operation and maintenance: Dust, shelter, etc. will affect the conversion efficiency of photovoltaic modules, so often clean the surface of solar modules is conducive to increase power generation.
5. After-sales quality assurance: professional after-sales service can guarantee the service life of the power station, extend the profit period, and avoid worries.
Therefore, based on the above points, in the case where the sunshine conditions cannot be changed, to defeat users with 99% of the power generated by their own power stations, there are the following methods.
How can household distributed photovoltaic power plants increase power generation?
1. Strictly control the quality of solar power stations
Photovoltaic modules, inverters and storage batteries are not general consumer products, with a life span of several years or decades, but their long-term reliability should not be judged only by appearance. In order to ensure the quality and long-term reliability of photovoltaic products and components, users can adopt the following measures:
(1) The most basic is to require the manufacturer to provide authoritative test and certification reports to ensure that the technical performance of the product submitted for inspection meets the technical standards and passes third-party testing, and the mass-produced products follow the same standards as the product submitted for inspection produce;
(2) Since photovoltaic modules and inverters are not short-term consumer products, they need to be checked again after one year of operation. The failure of "infancy" must be within the scope of the contract.
(3) In addition to the quality of products and components, the design and construction of photovoltaic projects are also very important. In order to ensure the quality of the project, the project developer can also entrust a qualified and experienced third party to review and supervise the entire process of engineering design, construction and installation, and project inspection.
2. Pay attention to the safety of photovoltaic power generation system to prevent catastrophic accidents
Safety is the most important part of the quality of photovoltaic systems. The safety of photovoltaic systems includes: building safety, power grid safety, anti-shock, anti-wind, anti-lightning, anti-fire and anti-arc, anti-theft, anti-sandstorm, etc. Building safety includes building load, anti-leakage, non-destructive insulation and building fire protection. Building safety assessment requires professional departments. Distributed photovoltaic integrated with building should pass building safety assessment before construction. If the pole insulation is damaged, a parallel circuit arc will be generated, and the ground insulation will be damaged, which will cause an arc to ground. Therefore, if the quality of cables, connecting devices, contactors, circuit breakers is wrong or the engineering installation is not serious, the arc may occur. Causes fire.
The wind resistance of the system needs to be designed according to the local maximum wind speed within 30 years, but it needs to be optimized and balanced among the factors such as the installation angle of the square array, the annual power generation, the building load, the area of ​​occupation, and the shadow occlusion. The load is directly related. The square array inclination designed to maximize the annual power generation may need to withstand larger wind loads, which requires a greater weight, and such a weight just exceeds the maximum load the building can withstand. , This requires changing the inclination of the guideline to adapt to the building load; for another example, high inclination requires a larger footprint, which increases the cost, and sometimes the roof area is limited, and there is no greater spacing between the squares, so The wind resistance design of the square array needs to adapt to local conditions.
3. Focus on daily operation and maintenance
(1) Select a manufacturer with data monitoring services, so that you can view the power generation data of the power station anytime, anywhere, in order to find problems and solve problems in advance.
(2) Choose a manufacturer with after-sales warranty service to provide regular after-sales inspections.
(3) Strengthen daily cleaning and maintenance to improve the conversion efficiency of photovoltaic modules.
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