The stable operation of solar power system can not be separated from high-quality components, accessories and stents, but in actual use, many users will encounter various problems, such as power generation efficiency decline, loose stents, damaged accessories and so on. In order to help you better understand the solar energy system, this article organizes some common problems, and gives practical answers, so that you take the wrong way, to ensure that the solar energy system to run efficiently for a long time.
1. Frequently Asked Questions about Solar Modules
Q: What is the reason that the power generation of solar panels decreases after using for a long time?
A: The power generation efficiency of solar modules will slowly decrease over time, which is a normal phenomenon, but if the power generation suddenly drops drastically, it may be due to the following reasons:
Dirty surface: Dust, bird droppings, leaf shading will affect light absorption, regular cleaning can restore power generation efficiency.
Component aging or hidden cracks: long-term wind and sunshine may lead to micro-cracks in the battery cells, affecting current transmission, professional testing is required.
Hot spot effect: Localized shading or damage may lead to heating of some cells, which will damage the module in the long run.
Q: Can solar panels still generate electricity when it rains?
A: Yes, but the power generation will be reduced. The output power of solar panels will be reduced on rainy days when the light is weak, but it is not a complete failure to generate electricity. In the case of thin-film modules, they may perform slightly better than crystalline silicon modules under low light conditions.
Q: How many years can solar panels last?
A: Currently, the warranty period of mainstream solar modules is usually 25 years (power attenuation of no more than 20%), but the actual service life can be up to 30 years or more. The key is to do routine maintenance to avoid physical damage and electrical failure.
2. Frequently asked questions about solar accessories
Q: The inverter often overheats and stops, what should I do?
A: Inverter overheating is usually due to poor heat dissipation or high load, you can take the following measures:
Make sure the inverter is installed in a well-ventilated location and avoid direct sunlight.
Check if the cooling fan works properly and clean the dust.
If the inverter power does not match with the solar system (e.g. the solar power is much larger than the rated power of the inverter), you need to replace it with a suitable model.
Q: What is the difference between solar cable and normal cable?
A: Solar-specific cables usually have better heat resistance, UV resistance, and anti-aging properties, because solar systems are exposed to the outdoors for a long time, and ordinary cables are easy to age and crack, leading to short circuits or fire risks. Therefore, be sure to use solar-specific cables with proper protection measures.
Q: Do I need to install storage battery for solar system?
A: If it is a grid-connected system, it usually does not need batteries, unless there are frequent power outages or you want to realize self-generation and self-consumption. If it is an off-grid system (e.g. remote area or no grid area), it must be equipped with energy storage battery to supply power at night or on cloudy days.
3. Frequently Asked Questions about Solar Racking
Q: Will rooftop solar racking damage the waterproofing?
A: It is true that roof leakage may occur if not installed properly. A professional installation team will do a good job of waterproofing the mounting fixing points, such as using a waterproof adhesive or a waterproof base. If it is a color steel tile roof, the bracket is usually fixed with clamps to avoid drilling; if it is a concrete roof, it needs to be sealed well after drilling.
Q: What should I do if the bracket is rusty? Will it affect the safety?
A: Rusted brackets will reduce the structural strength and may lead to loosening or even collapse if left untreated for a long time. It is recommended to choose galvanized or aluminum alloy bracket with stronger corrosion resistance. If it is already rusted, it should be descaled and sprayed with antirust paint in time. Seriously rusted brackets need to be replaced.
Q: How about the wind resistance of solar racking? Will it be blown away on typhoon days?
A: Qualified solar racking should be able to withstand the maximum wind force in the local area (generally required to resist more than 12 winds). If the installation is not solid (e.g. foundation depth is not enough, screws are not tightened), strong windy days may cause the bracket to loosen. In typhoon-prone areas, it is recommended to use a more solid concrete foundation or weighted bracket.
Conclusion
The stable operation of solar energy system cannot be separated from the reasonable selection and correct maintenance of components, accessories and racking. When encountering problems, do not deal with them blindly, especially the electrical part, it is recommended to contact professionals for overhauling. Regularly checking the cleanliness of solar panels, cable connections, and the solidity of the racking can greatly extend the life of the system and ensure the efficiency of power generation. I hope this article can help you to solve the common questions in the solar energy system, so that your solar power plant is more efficient and durable!
