More and more people are building home distributed photovoltaic power plants, however, the same installed capacity of electricity generated by the high and low; then how to effectively improve their roof power generation?
First, let's look at what factors affect solar power generation.
1 . Light conditions: home solar power station using solar power, the better the natural light resources, the greater the power generation; in the same light conditions in the area, after the pre-measurement and design, with the best tilt angle set power station, power generation than no pre-measurement and design, with the best tilt angle set power station installed significantly higher
2 . Product quality:
① PV module quality. Good quality PV modules with high conversion rate will naturally generate more power.
②Inverter quality. A good quality inverter with high conversion efficiency will naturally produce more power output.
3. Installation quality: Professional and reliable installation services can ensure that the installation is carried out in strict accordance with the optimal tilt angle of the module, which will not allow the product components to be damaged and will not cause potential construction hazards, thus avoiding subsequent safety problems such as leakage, fire and lightning strikes. Unprofessional installation may damage the product components and even lead to safety problems.
4. Daily operation and maintenance: dust, shading, etc. will affect the conversion efficiency of photovoltaic modules, so often clean the surface layer of solar modules to help improve power generation.
5. After-sales quality assurance: professional after-sales service can guarantee the service life of the power station, extend the revenue period and avoid worries.
Therefore, based on the above points, in the case of not being able to change the insolation conditions, to defeat the power generation of their own power station for 99% of the users, there are the following methods.
Home distributed photovoltaic power station how to improve power generation?
1 . Strictly control the quality of the solar power plant
Photovoltaic modules, inverters and batteries are not general consumer products with a life span of years and decades, but their long-term reliability should not be judged solely on the basis of appearance. Users can ensure the quality and long-term reliability of PV products and components by taking several measures, such as
(1) The most basic is to require manufacturers to provide authoritative test and certification reports to ensure that the technical performance of products submitted for inspection meets technical standards and passes third-party tests, and that mass-produced products are produced according to the same standards as those submitted for inspection;
(2) Since PV modules and inverters are not short-term consumer products and need to be checked again after one year of operation, the "infant" period of failure must be within the scope of the contractual agreement.
(3) In addition to the quality of the products and components, the design and construction of the PV project is 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 whole process of engineering design, construction and installation, project inspection, etc.
2. Pay attention to the safety of photovoltaic power generation systems to prevent catastrophic accidents
Safety is the most important component of PV system quality. Safety of PV system includes: building safety, grid safety, electric shock prevention, system wind resistance, lightning strike prevention, fire and arc prevention, anti-theft, sandstorm prevention, etc. Building safety includes building load, leakage prevention, no damage to insulation and building fire protection, building safety assessment needs to be carried out by professional departments, and distributed PV combined with buildings should first pass building safety assessment before construction. The broken pole insulation will produce parallel circuit arcing, while the destruction of ground insulation will produce arcing to ground, so if the quality of cables, connecting devices, contactors, circuit breakers have problems or engineering installation is not careful are likely to arc and cause a fire.
For example, the tilt angle of the array is directly related to the wind load, and the tilt angle of the array designed to maximize the annual power generation may require a larger wind load, thus requiring a larger counterweight, which It happens to exceed the maximum load that the building can bear, which requires changing the approach inclination to accommodate the building load; for example, a high inclination requires a larger footprint, which increases the cost, and sometimes the roof area is limited, which does not allow a larger spacing between the arrays, so the wind-resistant design of the arrays needs to be adapted to local conditions.
3. Focus on daily operation and maintenance
(1) Choose a manufacturer with data monitoring service, so that you can view the power generation data of the power station anytime and anywhere in order to find problems and solve them in advance.
(2) Choose a manufacturer with after-sales warranty service, which can provide regular after-sales inspection.
(3) Strengthen daily cleaning and maintenance in order to improve the conversion efficiency of PV modules.
