Economical 2, 3 or 4-String Solar Power Combiner / Terminal Box

  • $44.00
    Unit price per 

Economical 2, 3 or 4-String Solar Power Combiner / Terminal Box

Models (SKU):

SPTB-2 (2-String Model)
SPTB-3 (3-String Model)
SPTB-4 (4-String Model)


  • Models for 2, 3 or 4-String Connection
  • Continuous Duty Rated at 600V DC
  • Touch-safe Din-rail Terminal Blocks
  • All UL Compliant Components
  • Weatherproof, Non-conductive Box
  • Includes Output Circuit Cable Gland (not installed)


Compact Solar Power Combiners feature a weatherproof, non-conductive, UL listed enclosure with stainless steel mounting feet. Models feature terminal block connections for both input and output.


Operating Temperature: -40 to 130 ºF (-40 to 60 ºC)
Enclosure Size: 5.9 x 5.9 x 3.54" (150 x 150 x 90 mm)
Enclosure: Material: PC/PBT Blended Plastic
Enclosure Rating: NEMA 4X, UL Listed

Input Circuits: 2, 3 or 4
Input/output Circuit Connection: Terminal Blocks 6-16 AWG
Earth Ground Terminals 1 Ea, 8-14 AWG
Max Voltage Rating 600 Vdc
Max Current Per Input String: 20 Amps
Max Total DC Output Current:
2-String Model - 40 Amps
3-String Model - 60 amps
4-String Model - 65 Amps

Please Note: Output cable glands shown are included but not installed. You must drill holes to use the glands. We do not install them so you can select the output location and also have the option of using a conduit fitting for the output wire path.

This combiner box is assembled with UL listed components in the USA. The assembled finished unit does not have a separate UL listing.