The installation of solar panels is a complex system engineering project involving multiple steps and considerations. Proper installation not only ensures efficient operation of the panels but also extends their lifespan. The following will detail the installation process of solar panels, covering pre-installation preparation, installation steps, commissioning, and acceptance.
Pre-installation Preparation
1.Site Selection Assessment: The installation location of solar panels directly affects their power generation efficiency. An ideal location should meet the following conditions:
2.Sufficient Sunlight: Avoid shade, especially from trees and buildings. Daily sunlight exposure should ideally be at least 6 hours.
Angle and Direction: In the Northern Hemisphere, the panels should face due south, with the tilt angle adjusted according to the local latitude (generally equal to the latitude value). For example, a 40° tilt angle is recommended for panels in Beijing (approximately 40° latitude).
3.Structural Load-Bearing Capacity: When installing on a roof or ground, the structural load-bearing capacity must be confirmed to ensure it can support the weight of the panels, supports, and snow (if applicable).
Tools and Materials Preparation:
Tools: Electric drill, wrench, level, tape measure, multimeter, etc.
Materials: Solar panels, brackets, connecting cables, junction boxes, inverters (if needed), grounding wires, etc.
Safety Measures: Installers must wear safety helmets, non-slip shoes, and insulated gloves.
When working at heights, safety belts or suspended platforms must be used, and the brackets must be stable.
Installation Steps
1.Ground Installation: According to the design drawings, pour concrete foundation piles, ensuring uniform spacing (generally 2-3 meters). The bracket columns must be vertical, with an error not exceeding 1°.
2.Roof Installation: For sloping roofs, use guide rails or clamps to fix the brackets; for flat roofs, an inclined bracket must be erected, with the inclination angle referring to the site selection assessment results.
3.Solar Panel Fixing: Lift the solar panels onto the brackets and fix them with bolts or clips. Each solar panel requires at least 4 fixing points to ensure no loosening.
Leave a 5-10cm gap between solar panels for ventilation and cleaning.
Electrical Connections:
1.Series Connection: Connect the positive terminal of one solar panel to the negative terminal of the next, forming a series connection. The number of panels in series depends on the system voltage design (e.g., a 24V system requires two 12V solar panels in series).
Parallel Connection: Connect the positive terminals of the series connections to each other and the negative terminals to each other to increase current output.
2.Junction Box Usage: Each solar panel requires a junction box to protect the connection points from rainwater corrosion.
Inverter Connection to the Grid (if required): Convert the DC power output from the solar panels to AC power using an inverter. The inverter must be installed in a well-ventilated location, away from direct sunlight.
Connecting to the grid must be done by a professional electrician to ensure compliance with local power standards.
Commissioning and Acceptance
3.Preliminary Inspection: Check that all connections are secure and that there are no exposed wires.
Confirm that the surface of the solar panels is free of scratches and cracks.
4.Performance Testing: Use a multimeter to measure open-circuit voltage (Voc) and short-circuit current (Isc), comparing the results with the solar panel parameters. The error should be within ±5%.
Simulate sunlight conditions (e.g., using a solar simulator) to test power generation efficiency.
5.Acceptance Criteria: The system power generation efficiency must reach at least 90% of the design value.
Continuous operation for 72 hours without failure.
Special Scenario Precautions:
1.Snowy or High-Altitude Areas: Increase the tilt angle of the solar panels to reduce snow accumulation.
Select low-temperature solar cells to avoid performance degradation due to low temperatures.
Coastal or Salt Fog Environments: Brackets and connectors must be made of stainless steel or corrosion-resistant coating materials.
Regularly clean the surface of the solar panels to remove salt and prevent corrosion.
2.High-Risk Warnings!
Do Not Operate While Powered On: Always disconnect the inverter or grid connection before connecting or disconnecting the circuit.
Avoid Stepping on the Solar Panels: The glass surface of the solar panels is fragile; stepping on them may cause cracks, affecting power generation efficiency.
Lightning protection grounding: In areas prone to thunderstorms, lightning rods must be installed and the support structure grounded to prevent lightning strikes from damaging the equipment. We currently offer solar panels in various specifications, including 380W, 390W, and 400W, with a lifespan of up to 25 years and highly efficient and stable cells. Please contact us for more information.