With the development of clean energy, more and more rural families have begun to install photovoltaic power stations on rooftops, hoping that through the "self-use, surplus electricity online" model, it will be able to save electricity fees and bring in a portion of incremental income. During the promotion of photovoltaic, though, a lot of people still harbor some questions: Is photovoltaic-generated electricity directly usable? Rural rooftop mounted photovoltaic power generation, will radiation affect health?

 

 

This article will take these hot topics, in-depth resolve everyone's doubts, so that farmers can more comprehensively understand the principle of photovoltaic power generation, use and safety.

First, can the electricity generated by photovoltaic be used directly?

Photovoltaic power stations convert solar energy into direct current through the utilization of photovoltaic panels, but most of the household's daily electricity is alternating current. Therefore, the energy generated by the photovoltaic power station cannot be used directly, and the direct current must be converted to alternating current through the utilization of the inverter in order to be used for household load.

 

✅ 1. Dc to AC, inverter is the key

One of the key components of photovoltaic power plants is an inverter, and its key functions are:

Dc to AC: The direct current generated by the photovoltaic panel is converted to alternating current that meets the requirements of the national grid standards.

Intelligent control of power: According to the demand for electricity, intelligent distribution of power, to achieve "self-use" and "excess electricity online".

 

✅ 2. Grid-connected mode: self-generated + excess power online

Spontaneous self-consumption: While electricity is being generated by the photovoltaic power station, the electricity is prioritized to be consumed within the home, reducing the need to import electricity from the grid, thereby reducing the bill for electricity.

- Online excess electricity: When the electricity generation is greater than the household's real demand for electricity, the excess electricity will be transferred to the national grid automatically, subsidized or sold according to the local electricity price, to create additional economic income.

✅ 3. Off-grid mode: independent battery energy storage

For remote and rural areas without access to the grid, you can choose the off-grid photovoltaic system **, energy storage batteries are used to store photovoltaic energy and release the power supply at night or on rainy days in order to realize an independent power supply. But off-grid systems are more expensive, and energy storage batteries must be regularly maintained, so there are fewer uses.

 

Second, the photovoltaic power generation on the rural roof, will there be radiation?

People are concerned about the existence of "electromagnetic radiation" in photovoltaic power stations, and are afraid that photovoltaic panels installed on the roof will have an adverse effect on human health. But this concern is not necessary at all.

 

✅ 1. The photovoltaic panel itself does not emit electromagnetic radiation

The raw material for the photovoltaic panels is silicon material, and the underlying principle of their working is the photo-generated volt effect, i.e., the current generated due to the sunlight irradiation of silicon material. It is not an electromagnetic wave or ionizing radiation process, and is purely a physical process in which energy from light gets converted to electrical energy, and thus it doesn't possess any radiation hazard to the human body.

 

✅ 2. Electromagnetic radiation from the inverter is very low

In the process of converting direct current into alternating current, the inverter of the photovoltaic system will certainly produce a trace amount of electromagnetic waves, but the radiation level of its electromagnetic waves is far below the safety standard of the state.

According to national "Electromagnetic Environmental Control Limit value" (GB8702-2014) standard, the limit of electromagnetic radiation intensity of the living area is 0.4 microtesla, while the electromagnetic radiation generated by the inverter during operation is only 0.02 microtesla, far below the safety standard and will not exert any influence on the human body.

 

✅ 3. The electromagnetic radiation is less than that of household appliances used every day

If you compare the level of electromagnetic radiation emitted by domestic appliances, the radiation emitted by photovoltaic systems is even much less than that of domestic appliances such as microwave ovens, mobile phones, and Wi-Fi routers. For example:

- Electromagnetic radiation from mobile phone calls is about 1.5 microtesla;

- Radiation from microwave oven use is up to 2-3 microtesla.*;

- Wi-Fi routers emit about 0.1 microtesla.

So, rooftop photovoltaic power generation electromagnetic radiation is much smaller than that of home appliances and is harmless to human health.

 

Third, the advantages of photovoltaic power stations: not only safe, but also save money and make money

The use of photovoltaic power stations is not only safe and reliable, but also has direct economic benefits:

1. Save on your electricity bill

Photovoltaic power generation is prioritized for household use, and the monthly electricity bill is significantly reduced, especially in the summer peak season, and the electricity savings are more considerable.

2. Sell excess electricity to make money

The surplus electricity of photovoltaic power stations can be sold to the power grid, and the income can be calculated according to the local on-grid electricity price to achieve long-term stable additional income.

3. Enjoy the national subsidy policy

Rural areas in some regions still enjoy policy support such as subsidies on electricity and tax refunds for photovoltaic projects, greatly increasing the rate of return on investment.

 

Fourth, what are the concerns to be paid attention to when installing photovoltaic power stations?

As great as photovoltaic power generation is, the following must also be taken into consideration when installing:

✅ 1. Choose formal enterprise cooperation

Choose a credible and professional photovoltaic installation company to avoid affecting the safety and efficiency of photovoltaic power plants caused by equipment quality problems or construction problems.

 

✅ 2. Check the load-bearing and direction of the roof

Ensure that the roof has a sufficient load-bearing capacity, and choose a south-facing, obstacle-free area to install photovoltaic panels to get the best power generation effect.

 

✅ 3. Periodically maintain the photovoltaic equipment

Although the operating cost of photovoltaic power stations is minimal, regular dust cleaning on photovoltaic panels and checking the working state of inverters works to extend the lifespan of the system and ensure the efficiency of power generation.

 

Fifth, conclusion: photovoltaic power generation, safe, reliable and cost-effective

Does the electricity generated from photovoltaic directly apply the photovoltaic power generation on the rural roof, is there radiation? These problems are not complicated. Photovoltaic power generation converts electrical energy by inverters for household use, and the radiation of photovoltaic panels and inverters is much less than common household appliances, and it has no damage to human health.

For rural households, the installation of photovoltaic power plants is not just an excellent way of saving on electricity bills, but also earning additional income from selling the surplus electricity online. When choosing photovoltaic installation, as long as you choose a formal company, rational planning, scientific maintenance, you can enjoy the long-term green energy. Photovoltaic power generation is truly a safe and reliable "green investment".