MC4 Crimping Plier (Model LY2546B) — Ratchet Crimper and Spanner for Solar Panel Connectors Overview This MC4 crimping plier (LY2546B) is a dedicated tool for installing and servicing MC4 solar panel connectors and PV cable assemblies. It combines a ratchet crimper with a builtin spanner to deliver secure, repeatable crimps for solar wire sizes 2.5 / 4 / 6 mm² (14–10 AWG). Key benefits Reliable electrical connections: Designed specifically for MC4 connectors, the tool creates consistent crimps that reduce the risk of loose contacts and connection failures. Safer, faster installations: The ratchet mechanism ensures complete crimps every time and prevents undercrimping, speeding up installation and maintenance. Allinone convenience: Integrated spanner function helps with connector assembly and disassembly, reducing the need to carry multiple tools on site. Versatile compatibility: Works with standard PV cable sizes 2.5, 4, and 6 mm² (14–10 AWG), covering the most common solar cabling needs. Key attributes Model: LY2546B Functionality: Ratchet crimper for MC4 connectors plus builtin spanner for connector housing Compatibility: MC4 solar panel connectors and PV cables, wire sizes 2.5 / 4 / 6 mm² (14–10 AWG) Use type: Field and workshop use for installation, , and maintenance of solar systems How it solves common problems Poor or inconsistent crimps are a frequent source of power loss and intermittent faults in solar arrays. The LY2546B ratchet crimper provides a controlled, repeatable crimp action that ensures the conductor and contact are compressed properly. The integrated spanner allows quick tightening or loosening of MC4 housings without switching tools, minimizing downtime during installation or service. Typical applications / use cases Residential and commercial rooftop solar installation: Crimp MC4 contacts and assemble connectors while installing PV modules and stringing cables. Field maintenance and repairs: damaged MC4 connectors or recrimp cable leads during troubleshooting or scheduled service visits. Preassembly of cable harnesses: Prepare multiple PV cable assemblies in a workshop before onsite deployment for solar farms or microinverter systems. Basic usage tips Strip conductor to the correct length for the MC4 contact before inserting. Place the contact and conductor into the appropriate 2.5 / 4 / 6 mm² crimp position, then operate the ratchet until it releases to ensure a full crimp. Use the integrated spanner to tighten or loosen the MC4 connector housing as needed. Professional, practical, and built for PV work, the MC4 Crimping Plier LY2546B provides the functionality installers and technicians need to produce reliable solar connections using 2.5/4/6 mm² (14–10 AWG) cabling.