The function of solar panels is to convert the light energy of the sun into electric energy, and then output DC power to store in the battery. Solar panel is one of the important components in solar power generation system. Its conversion rate and service life are important factors to determine whether the solar cell has use value.
Component design
It is designed according to the requirements of iec:1215:1993 standard of the International Electrotechnical Commission. 36 or 72 polysilicon solar cells are connected in series to form various types of components of 12V and 24V. The module can be used in various household photovoltaic systems, independent photovoltaic power stations and grid connected photovoltaic power stations.
Characteristics of raw materials
Cell: adopt high-efficiency (more than 14.5%) polysilicon solar cell packaging to ensure sufficient power generation of solar panels.
Glass: low iron tempered suede glass (also known as white glass) is used, with a thickness of 3.2mm. The light transmittance in the wavelength range of solar cell spectral response (320-1100nm) is more than 91%, and it has high reflectivity for infrared light greater than 1200 nm. At the same time, this glass can withstand the radiation of solar ultraviolet light, and the transmittance does not decrease.
EVA: a high-quality EVA film with a thickness of 0.78mm added with anti UV agent, antioxidant and curing agent is used as the sealant of solar cells and the connecting agent with glass and TPT. It has high light transmittance and anti-aging ability.
TPT: the back cover of the solar cell fluoroplastic film is white, which reflects the sunlight, so the efficiency of the module is slightly improved. Because of its high infrared emissivity, it can also reduce the working temperature of the module and improve the efficiency of the module. Of course, this fluoroplastic film first has the basic requirements of aging resistance, corrosion resistance and air tightness required by the solar cell packaging material.
Frame: the aluminum alloy frame used has high strength and strong mechanical impact resistance.
Basic parameters
Standard test conditions: (AM1.5) irradiance =1000w/m2, battery temperature =25 ℃
Insulation voltage: ≥ 600V
Frame grounding resistance: ≤ 10hm
Windward pressure: 2400pa
Fill factor: 73%
Short circuit current temperature coefficient: +0.4ma/ ℃
Open circuit voltage temperature coefficient: -60mv/ ℃
Working temperature: -40 ℃ ~ +90 ℃
Component wiring instructions
Tools required for installation
One M4 slotted screwdriver and one cross screwdriver respectively.
Opening of junction box cover
Insert the M4 slotted screwdriver into the mounting hole on the box cover according to the mark on the junction box, and gently lift one foot. In this way, first lift the four corners on the side, and then open the box cover. There is a wiring cover in the box. Lift it up to see three wiring terminals.
Wiring of battery panel
There are positive and negative signs next to the left and right wiring terminals, which represent the positive and negative poles of the output voltage of the battery in the working state. According to the power demand, the positive pole is connected to the positive and the negative pole is connected to the negative pole.
The wiring is mechanically compressed. Unscrew the compression screw of the terminal with M4 cross screwdriver, peel the wire, pass it through the G7 cable sealing connector, insert it into the wiring hole, and compress the wire.
After the wires are connected, cover the protective cover, screw the self tapping screws into the screw holes with M4 cross screwdriver, and then cover the junction box after fixing, that is, complete the wiring of the battery board.
Grounding of battery board
A grounding screw is installed on the back of the battery board, and the grounding wire can be safely grounded by fixing it on the grounding screw.