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Frequently Asked Questions

About some of the answers to frequently asked questions, if there are other issues that confuse you, you can directly contact customer service, we will give you a patient answer!

Why is the curve of the inverter missing half of the curve, can you please analyze how many possibilities there are?

The power station is connected to Neteco 1000S, monitoring the inverter and found that the curve is always missing half of the curve, and there are no alarms.
Please help, how many reasons are there? How do I troubleshoot and deal with it?

How do I test the grounding resistance of a rooftop power plant?

Today there are 1.2MW photovoltaic power station into the delivery and acceptance, the power station was built on the roof of 5 buildings (3 floors), the party required to test the grounding resistance. We welded the system grounding and roof lightning protection grounding together during construction! May I ask: how to test the grounding resistance?

What is “self-generation and self-consumption, with residual power going online”?

Self-generated self-consumption surplus power on-line refers to the distributed photovoltaic power generation system of power generated mainly by the power users themselves, the excess power access to the grid, which is a distributed photovoltaic power generation business model, for this mode of operation of photovoltaic grid is located in the load side of the user’s meter, need to increase the PV counter-feeding power metering meter or the grid power meter is set up as a bi-directional metering, the user’s own direct use of photovoltaic power to save electricity directly enjoy sales tariffs. Users directly use the PV power to save electricity directly enjoy the grid’s sales tariffs, the counter-feeding power is measured separately and settled with the prescribed feed-in tariffs.

What is a distributed PV system?

Distributed photovoltaic power station refers to the use of decentralized resources, the installed size of the smaller, arranged in the vicinity of the user’s power generation system, generally connected to the grid below 35 kV or lower voltage level, it uses photovoltaic modules, solar energy will be converted directly into electrical energy. It is a new type of power generation and comprehensive utilization of energy with broad development prospects, advocating the principle of nearby power generation, nearby grid connection, nearby conversion, and nearby use, which not only can effectively improve the power generation capacity of PV power stations of the same scale, but also effectively solves the problem of power loss in voltage boosting and long-distance transportation.

How to choose the grid-connected voltage for a distributed PV grid-connected system?

Distributed photovoltaic system grid voltage is mainly determined by the installed capacity of the system, the specific grid voltage needs to be based on the grid company’s access system approval decision, the general selection of household AC220V access to the grid, commercial can choose AC380V or 10kV access to the grid.

Can distributed PV grid-connected systems be installed in agricultural greenhouses and fish ponds?

Greenhouse heating, heat preservation has been a key problem plaguing farmers, photovoltaic agricultural greenhouses are expected to solve this problem, due to the high temperature in the summer in the June-September months of many categories of vegetables can not be normal growth, and photovoltaic agricultural greenhouses, as in the agricultural greenhouses outside the addition of a spectrophotometer, which can be isolated from infrared rays, to prevent excessive heat into the greenhouses in the winter and the darkness of the night time and to prevent infrared wavelengths of light in the greenhouse to radiate outward to play the effect of heat preservation. In winter and at night, it can prevent the infrared band of light inside the greenhouse from radiating outward, and play a heat preservation effect. Photovoltaic agricultural greenhouses can supply the power needed for lighting in the agricultural greenhouses, and the remaining power can also be connected to the grid. In the off-grid form of photovoltaic greenhouses can be deployed with the LED system, daytime light blocking to ensure plant growth, while generating electricity. At night, the LED system applies daytime power to provide lighting. In fish ponds can also be erected photovoltaic arrays, ponds can continue to raise fish, photovoltaic arrays can also provide good shade for fish farming, a better solution to the development of new energy and a large number of land occupation of the contradiction, so the agricultural greenhouses and fish ponds can be installed distributed photovoltaic power generation system.

Why is the curve of the inverter missing half of the curve, can you please analyze how many possibilities there are?

The power station is connected to Neteco 1000S, monitoring the inverter and found that the curve is always missing half of the curve, and there are no alarms.
Please help, how many reasons are there? How do I troubleshoot and deal with it?

Which locations are suitable for installing distributed PV systems?

Industrial plants: especially in factories where electricity consumption is relatively large and net purchased electricity is relatively expensive, usually the roof area of the plant is very large and the roof is open and flat, suitable for installing PV arrays and due to the large load of electricity consumption, the distributed PV grid-connected system can be done to locally consume and offset a portion of the net purchased electricity, thus saving the user’s electricity bill. Commercial buildings: similar to the role of industrial parks, the difference is that commercial buildings are mostly concrete roofs, more favorable with the installation of photovoltaic arrays, but often on the building aesthetics requirements, in accordance with the characteristics of commercial buildings, office buildings, hotels, conference centers, resorts and other service industries, the user load characteristics are generally shown as higher during the day, lower at night, can be better matched with photovoltaic power generation characteristics. Agricultural facilities: there are a large number of available roofs in rural areas, including their own homes, greenhouses, fish ponds, etc. Rural areas are often in the public power grid is not a little bit, the quality of electricity is poorer, the construction of distributed photovoltaic systems in the countryside can improve the security of electricity and the quality of electricity. Municipal and other public buildings: due to the unified management standards, user load and business behavior is relatively reliable, installation enthusiasm is high, municipal and other public buildings are also suitable for distributed PV centralized construction. Remote agriculture and animal husbandry areas and islands: Due to the distance from the power grid, remote agriculture and animal husbandry areas in Tibet, Qinghai, Xinjiang, Inner Mongolia, Gansu, Sichuan and other provinces, as well as China’s coastal islands, there are still millions of people without electricity, off-grid photovoltaic systems or other energy sources complementary microgrid power generation systems are very suitable for application in these areas.