Flexline™ Junction Box

The dual listed Flexline™ Junction Box provides an unparalled adhesion to the back of flexible or thin film PV modules.

Flexline™ Junction Box
Part #: STG.FL.JB.21

The Flexline Junction Box’s slim 20 mm profile allows for not only easy handling, but reduced material and installation costs. These cost reductions do not come at the expense of durability, however, as the Flexline Junction Box is the Shoals standard IP67 with IP68 following testing on the module.

Additionally, the Flexline Junction Box is available with customizable wire
lengths and connectors, and is suitable for 600V(UL) or 1000V(TÜV) systems, providing a universal solution for all of today’s photovoltaic modules.


  • Suitable for flexible or rigid modules
  • Low profile, 20mm, design to reduce material and installation costs
  • Designed in conformity with TÜV and UL standards
  • Customizable wire lengths
  • Customizable connector solutions
  • Compatible with 600V or 1000V systems

STG.FL.JB.21 (FG1120)
Rated Current (A) 25
Rated Voltage (VDC) 600V(UL) / 1000V(TÜV)
Diodes Yes / Customizable
Installation Adhesive Tape / Silicone Adhesive
Connection of Contact Ribbons Soldering
Insulation Material PPE
Degree of Protection IP67
Safety Class II
Flame Class UL94-V0
Ambient Temperature Range (°C) -40 to 80
Cable Size (AWG) 12-14
Connectors Any Approved PV Connector
Certifications UL & TUV