2 or 3-String Pre-wired Solar Combiner Box - 300V Solar Circuit Breakers

  • $219.00
    Unit price per 

2 or 3-String MC4 Pre-wired Input Solar Combiner Box with 300V Solar Circuit Breakers


  • 2 or 3-String Configuration
  • Pre-wired MC4 Connector Inputs
  • Continuous Duty Rated at 300V DC
  • Touch-safe Circuit Breakers, 5, 8, 10, 12, 15 or 20 Amp
  • Optional Lightning/Surge Module
  • All UL Compliant Components
  • Weatherproof, Non-conductive Box
  • Includes Output Circuit Cable Gland (not installed)

Economical, compact, Pre-wired.String Solar Power Combiner box feature a weatherproof, non-conductive, UL listed enclosure. This configuration with Solar Circuit Breakers is rated for 150V DC continuous duty each string.

General Specifications
Operating Temperature: -40 to 130 ºF (-40 to 60 ºC)
Enclosure Size:  7.9 x 5.9 x 3.9" 
Enclosure: Material: PC/PBT Blended Plastic
Mounting: Stainless Steel Mounting Feet included
Enclosure Rating: NEMA 4X, UL Listed
Breaker Input Circuits 2 or 3
String Input Connection: MC4 Connectors
Output Wire Connection: 6-14 AWG
Earth Ground Terminals 2 Ea, 8-14 AWG
Max String Voltage Rating 300V DC
Circuit Breaker Rating 5, 8, 10, 12, 15 or 20

Max Total DC Output Current

2-String Model (2 X Breaker Size= Max Output Amps)
3-String Model (3 X Breaker Size= Max Output Amps)

Optional Lightning/Surge Module (LM) Specification.

Type of Design: Silicon Oxide Varistor 500V
Maximum number of surges: Unlimited
Response time one milliamp test: 5 nanoseconds
Response time to clamp 10,000 amps: 10 nanoseconds
Response time to clamp 50,000 amps: 25 nanoseconds
Maximum Current: 60,000 amp

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.