These DC combiner boxes connect solar-array strings to the inverter through a combined protection and switching arrangement. Individual inputs use DC fuse protection, with PV-specific surge protection and a high-voltage DC circuit breaker at the output. Anti-reverse protection and monitoring for individual strings are optional.
MC4 input connectors and waterproof output terminals support the selected cable arrangement. Spray-coated steel enclosures are available with different input counts, internal layouts and top-cover configurations for outdoor PV installations.
| Parameter | Specification |
|---|---|
| Maximum DC voltage | 1000V; array open-circuit voltage must remain within the selected configuration rating |
| DC input options | 2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20 or 24 inputs |
| Output count | 1-24, according to configuration |
| Input fuse range | 10-32A |
| Operating temperature | -25°C to +60°C |
| Altitude | Up to 2000m; derating required above 2000m |
| Enclosure material | Spray-coated steel |
| Enclosure protection | IP65 |
| Optional functions | Anti-reverse protection and individual-string monitoring |
| Warranty | 1 year |
Select the input count, output arrangement, fuse rating and optional monitoring to match the PV strings and inverter input requirements. The listed input and output ranges describe configuration choices; they do not establish that every input/output combination is available. The gallery shows alternative enclosure and protection layouts.
