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Q&A on knowledge of home photovoltaic power plants
来源: | 作者:hardware-441 | 发布时间: 2786天前 | 464 次浏览 | 分享到:
Many ordinary people plan to install home photovoltaic power plants, but they have various concerns. Today, I have compiled some common questions for everyone to refer to.

1. Will there be an electric shock when touching the battery board after lightning strikes?

Answer: Photovoltaic systems all have lightning protection measures.

2. Will reflective battery panels affect neighbors?

Answer: Currently, photovoltaic modules are mostly made of coated glass, and the impact of reflection is minimal.

3. Is there radiation from the battery panel?

Answer: Photovoltaic power generation systems convert solar energy into electrical energy based on the principle of photovoltaic effect generated by light, which is pollution-free and radiation free. Electronic devices such as inverters and distribution cabinets have passed EMC (electromagnetic compatibility) testing, so they are not harmful to human health.

4. If the power grid loses power, can photovoltaic still be used?

Answer: With the sun, photovoltaic systems can generate electricity. The grid connected inverter has island protection and automatically stops output when the mains power is cut off. It can be understood that the system is generating electricity, but it is not connected.

5. Will there be a shortage of electricity during cold weather in winter?

Answer: The factors that directly affect power generation are radiation intensity, duration of sunlight, and operating temperature of solar cell components. In winter, the radiation intensity will be weak, the duration of sunlight will be short, and the power generation will be less than in summer. Distributed photovoltaic power generation is connected to the power grid, and as long as there is electricity in the grid, the household load will not experience power shortages or power outages.

6. How to clean photovoltaic modules?

Answer: Rainwater can be cleaned without special maintenance. If you encounter adhesive dirt, simply wipe it off.

7. Is there a risk of electric shock when wiping with water?

Answer: In order to avoid electric shock injury and possible damage to the components caused by wiping them under high temperature and strong light, it is recommended to carry out component cleaning work in the morning or late afternoon.

8. Can I step on the component for cleaning work?

Answer: The component has a certain load-bearing capacity, but it cannot be cleaned by stepping on it, which can cause hidden damage to the component and affect its lifespan.

9. Will house shadows, leaves, or even bird droppings on photovoltaic modules affect the power generation system?

Answer: There may be a hot spot effect that can affect the power generation. If leaves and bird droppings are found, they need to be cleaned up in a timely manner.

10. Can it resist typhoons and hail?

Answer: The system is designed based on local conditions, taking into account wind pressure, stacking, and roof style.

11. Under the scorching sun, do vulnerable components need to be replaced immediately if they are damaged?

Answer: It is not possible to replace it immediately. It is recommended to replace it in the morning or later in the afternoon. The power station operation and maintenance personnel should be contacted in a timely manner, and professional personnel should go to replace it.

12. Do I need to disconnect the photovoltaic power generation system during thunderstorm weather?

Answer: Distributed photovoltaic power generation systems are equipped with lightning protection devices, so there is no need to disconnect them. For safety reasons, it is recommended to disconnect the circuit breaker switch of the combiner box and cut off the circuit connection with the photovoltaic module to avoid direct lightning damage that cannot be removed by the lightning protection module. Operations and maintenance personnel should promptly test the performance of the lightning protection module to avoid the harm caused by the failure of the lightning protection module.

13. How is the power generation effect on cloudy and rainy weather?

Answer: It also generates electricity, but the effect is not very good. If it is cloudy, the power generation is only about 20% of that on sunny days.

14. How to match a household temperature of around 180 degrees per month?

Answer: 180 degrees per month, with an average of 6 degrees per day. Installing a 2KW system is sufficient, and the sunshine time is calculated as 4 hours.

15. The commercial electricity used in my home costs 1 yuan per kilowatt hour. Can this type of commercial and residential building be connected to the grid for photovoltaic power generation and receive subsidies?

Answer: It's completely possible. This electricity price is more cost-effective than installing solar power for civilian use.

16. How to estimate the investment of household distributed photovoltaic power generation systems? How long does it usually take to recover costs?

Answer: The installation capacity of a typical household distributed photovoltaic power generation system is about 3-10 kilowatts. Calculated at a cost of 10-12 yuan per watt, the system investment is about 36000-1200 yuan. According to different lighting conditions, user side electricity prices, subsidies, and system costs, costs can be recovered within 6-8 years, and the lifespan of photovoltaic systems can reach or exceed 25 years. This means that the electricity revenue generated and saved electricity bills in the remaining nearly 20 years will become direct profits.

17. If considering various costs, what is the cost of generating one kilowatt hour of electricity for distributed power plants?

Answer: 0.6 yuan -1 yuan/kWh, with significant differences depending on regional sunshine conditions and system capacity. The larger the system, the lower the cost.

18. If we add a sun tracker (which automatically adjusts the angle and direction of the battery panel), will it generate more electricity?

Answer: It is possible to generate more electricity, but the cost is not proportional to the amount of electricity generated, and the payback period needs to be increased. In addition, the tracker belongs to mechanical equipment and has low reliability, which will increase costs.

19. Are there any restrictions on installing solar power generation equipment?

Answer: There are generally no conditions for home installation, and you need to fill out a form and apply at the power grid business hall

20. Is it difficult to install on your own?

Answer: Professional knowledge is required. Professional installation requires equipment qualification for the power grid.

21.Can the power generation be guaranteed?

Answer: It can be guaranteed. It is recommended to find a legitimate and professional rooftop photovoltaic installer.


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