Solar Junction Box Installation Guide: Steps & Best Practices

Solar Junction Box Installation Guide: Steps & Best Practices

Prior to utilization, the junction box necessitates meticulous testing, focusing on aspects such as aesthetic integrity, sealing efficacy, fire resistance level, and the qualification status of the diode.

The structured testing procedure encompasses:

1. Appearance Evaluation: Scrutinizing dimensions and potential defects, executed in accordance with incoming inspection operational guidelines.
2. Mechanical Integrity Assessment: Analyzing the tension between the guide and bus bar; evaluating clamping force at diode angles; assessing the tension between the wire and the junction box, and between the junction box and curing.
3. Fire Resistance Level: Conducting fire resistance tests externally, typically involving ignition and recording extinguishing time.
4. Continuity Inspection: Employing a multimeter to ascertain the connectivity at both wire ends.
5. Low-Temperature Resilience: Undertaking low-temperature impact assessments, aligned with VOE V0126-3-2006 6.3.10 requirements.
6. Thermal Deformation Analysis: Conducting baking tests at 90℃ for four hours to detect any deformations.
7. Reliability Verification: Adhering to IEC requirements for comprehensive testing.

Usage Precautions:

1. Ascertain the junction box has undergone and passed all requisite tests before deployment.
2. Prioritize determining terminal spacing before initiating a production order to establish the typesetting process accurately.
3. During installation, ensure uniform and comprehensive application of glue to maintain optimal sealing between the box body and the backplane.
4. Distinguish between positive and negative terminals meticulously during installation.
5. Verify sufficient tension between the bus belt and the airport when connecting the contact terminal to the bus belt.
6. While utilizing a welding terminal, maintain concise welding durations to prevent diode damage.
7. Secure the box cover firmly during installation.