Solar Certification for Balance of System

Balance of System

UL provides balance of system (BOS) equipment certification covering fuses, holders, combiner boxes and end products such as meters.

  • UL Subject 248-19 and UL Subject 2579 for fuses
  • UL 98B and UL 508I for disconnects
  • UL 489B circuit breakers
  • UL Subject 4248-18 and UL Subject 4248-19 for fuse holders
  • UL 1741 combiner boxes