More and more people are building home distributed photovoltaic power plants, but the same installed capacity can generate high or low electricity; then how can we effectively increase the power generation on their roof?
First, let's take a look at what factors affect solar power generation.
1. Illumination conditions: Household solar power stations use solar energy to generate electricity. The better the natural light resources, the greater the power generation; in areas with the same lighting conditions, after pre-measurement and design, the power station set at the best inclination angle will generate more power than none After preliminary measurement and design, the power station installed at the best tilt angle is obviously on the high side
2. Product quality:
①The quality of photovoltaic modules. PV modules with good quality and high conversion rate will naturally generate more electricity.
②The quality of the inverter. A good quality inverter has high conversion efficiency, and the natural output power generation will be higher.
3. Installation quality: professional and reliable installation service can ensure that the installation is carried out in strict accordance with the best inclination angle of the components, will not damage the product components, and will not cause potential construction hazards, so as to avoid subsequent safety problems such as leakage, fire, and lightning strikes. . Unprofessional installation may damage the parts of the product and even cause safety problems.
4. Daily operation and maintenance: Dust, obstructions, etc. will affect the conversion efficiency of photovoltaic modules, so often cleaning the surface of solar modules is beneficial 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, if the sunlight conditions cannot be changed, to defeat the users whose own power station generates 99% of the electricity, 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 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 take the following measures:
(1) The most basic thing is to require manufacturers to provide authoritative test and certification reports to ensure that the technical performance of the products submitted for inspection meets the technical standards and passes third-party testing, and the mass-produced products follow the same standards as the products submitted for inspection. Production;
(2) Since photovoltaic modules and inverters are not short-term consumer goods, they need to be inspected again after one year of operation. The invalidation of "infancy" must be within the scope agreed in 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 project design, construction and installation, and project inspection.
2. Pay attention to the safety of photovoltaic power generation systems 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, protection against electric shock, system wind resistance, lightning protection, fire and arc protection, anti-theft, anti-sandstorm, etc. Building safety includes building load, anti-leakage, non-damaging insulation and building fire protection. Building safety assessment needs to be carried out by professional departments. Distributed photovoltaics integrated with buildings should first pass the building safety assessment before construction. The damage of the pole insulation will produce a parallel circuit arc, and the destruction of the ground insulation will produce an arc to the ground. Therefore, if the quality of the cables, connecting devices, contactors, and circuit breakers are problematic or the engineering installation is not serious, arcs may occur. Cause a fire.
The wind resistance of the system needs to be designed according to the local maximum wind speed in 30 years, but it needs to be optimized and balanced among various factors such as the inclination angle of the square array, annual power generation, building load, land occupation, shadow shielding, etc., such as the inclination angle of the square array and wind. The load is directly related. The inclination angle of the square array designed to maximize the annual power generation may need to bear a greater wind load, which requires a larger counterweight, and such a counterweight just exceeds the maximum load that the building can withstand , This requires changing the target inclination angle to adapt to the building load; for example, a high inclination angle requires a larger land area, which increases the cost. Sometimes the roof area is limited and larger spacing between square arrays is not allowed, so The wind-resistant design of the square array needs to be adapted to local conditions.
3. Pay attention to daily operation and maintenance work
(1) Choose a manufacturer with data monitoring services, so that you can view the power generation data of the power station anytime and anywhere, so as to find and solve problems in advance.
(2) Choose a manufacturer with after-sales quality assurance services that can provide regular after-sales inspections.
(3) Strengthen daily cleaning and maintenance to improve the conversion efficiency of photovoltaic modules.