What are the components of photovoltaic power generation system? Buy light to avoid these misunderstandings

Photovoltaic power generation is increasingly favored by home users, I think not only because of the high-end atmosphere. The main reason for the grade is that users can enjoy a self-powered, energy-saving, low-carbon living state, and can also respond to the national call to sell excess electricity to the national grid. Moreover, distributed power generation is flexible, distributed in households, companies, and communities, and the construction cost is also low. A complete set of household grid-connected photovoltaic power generation system includes photovoltaic modules, inverters, cables, brackets, and grid-connected cabinets. Next, let CSIT new energy manufacturers give you a detailed introduction to the main functions of each item;

1. Photovoltaic modules

The common categories of photovoltaic modules are: monocrystalline silicon components, polycrystalline silicon components, amorphous silicon components. Monocrystalline silicon module efficiency 12%-18. 25%, polycrystalline silicon module efficiency 12%-16. 25%, amorphous silicon module efficiency 5%-8%; The current power size of monocrystalline silicon or polysilicon is 3W-310W, and amorphous silicon is basically customized. For example, the thickness of the battery, generally the thicker the better, not easy to break, energy efficiency of less than 10%, belongs to the garbage, it is recommended to use regular photovoltaic module manufacturers.

CSIT 540W to 560W photovoltaic modules Solar panel factory price：

Main features:

1. MBB half battery with PERC technology

2. Higher power output

3. Better low light performance

4. The shading effect is small

5.PID resistance

6. Increase mechanical load

7. Compatible with mainstream trackers.

CSIT 540W to 560W photovoltaic modules The price of solar panels is characterized by high efficiency, low shadow effect and high power output.

2, grid cabinet

At present, there are many kinds of grid-connected cabinets in the market, the efficacy and price are messy, the outer box has stainless steel and iron, and many installation companies buy a box to go back to assembly, which depends on the level of the technical engineer, and the wiring is also very important. It is recommended to purchase grid-connected cabinets produced by regular manufacturers with mass production quality guaranteed warranty.

Key features of CSIT Integrated cabinet for commercial and industrial energy storage systems:

* Adopt a new generation of Ningde era lithium iron phosphate battery.

* The maximum conversion efficiency is 97%.

* Battery cycle life up to 10,000 times.

* Internal lithium battery rated energy of approximately 219.34kWh.

* Integrated design, highly integrated.

* Modular design with different optional parts. Install side-by-side or back-to-back parallel.

* Compatible with different brands of batteries, optional PV input.

The all-in-one cabinet for commercial and industrial energy storage systems comes with A 10-year warranty, is customized to your requirements and is made from Class A CATL square lithium batteries.

3. Inverter

At present, there are two common types on the market, one is a high-frequency inverter, and the other is a power frequency inverter. The conversion efficiency of high-frequency inverter is basically more than 90%, but it has obvious damage to household appliances, especially inductance circuits, of the mains standard. The most obvious experiment is that the mobile phone charger is obviously high temperature when used on the high-frequency inverter, some are also accompanied by high-frequency noise, the other is the power frequency inverter, this power frequency inverter is the most ideal home photovoltaic inverter, because the transformer volume is relatively large, but also needs a lot of heat dissipation, the efficiency is generally more than 80%, can meet the mains standard of all home appliances equipment. Because photovoltaic charging can be done every day, the impact of the power consumption of the power inverter is not obvious. This kind of power frequency inverter is generally priced at 1 yuan per watt.

CSIT Hybrid 9kw 12kw 15kw 18kw 22.5kw Three-phase inverter for high voltage energy storage system：

The CSIT three-phase inverter is a multifunctional solar inverter that integrates an MPPT solar charging controller and a high frequency pure sine wave inverter in one machine, ideal for off-grid/grid-connected backup power and self-consumption applications. It can convert direct current into three-phase alternating current.

Main features of CSIT single-phase inverter:

1.IP65 waterproof standard; 2. Applicable to LiFePO4; And lead-acid batteries; 3. The maximum charging efficiency is 97.5%; 4. Multiple working modes can be set flexibly

4, photovoltaic bracket

Photovoltaic bracket selection is currently on the market common photovoltaic bracket aluminum alloy, stainless steel, galvanized steel, generally aluminum alloy used on the slope roof above, stainless steel and galvanized on the flat roof, but there are also some installation companies on the flat roof with aluminum alloy, in fact, this is not reasonable practice, aluminum alloy strength is not enough, flat roof is to build shelves to stand up, Although the customer looks good, but not practical, wind and bad weather will have security risks. Speaking of safety risks, the strength and thickness of the support selection must be paid attention to, because the design life of the solar photovoltaic system is more than 20 years, so good corrosion resistance is also an important indicator to measure the quality of the support system.

6. Cable

The photovoltaic cables currently advertised on the market are double-layer insulation protection. The DC power supply circuit should use two-core cables, and single-core cables can be used when required. PVC insulated cables should not be used in places with high temperature above 100 ° C or low temperature below -20 ° C. When laying cables in direct burial, when the cable is subjected to greater pressure or there is a risk of mechanical damage, use steel tape armored cables. The temperature of the cable core under the action of the maximum operating current shall not exceed the allowable value determined by the service life of the cable. Determine the ambient temperature at which the cable continues to allow the carrying capacity. If the cable is laid in the air or in the cable trench, the average value of the highest temperature on the hottest day should be taken. Photovoltaic special cable, the cable string to the bus box is generally used photovoltaic special cable PV1-F1*4mm2. Photovoltaic cable structure is simple, the use of polyolefin insulation material has excellent heat resistance, cold resistance, oil resistance, ultraviolet resistance, can be used in harsh environmental conditions, with certain mechanical strength.