4 in 1 out DC 1000V Combiner Box
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Technical Data
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| Product Family ID | OS-ETK-EKDBS-PV4-1-BFS-1000 |
|---|---|
| Variant SKU Count | 1 |
| Supplier | ETK |
| Supplier Model | EKDBS-PV4-1-BFS-1000 |
| Product Type | PV Combiner Box |
| Available Voltage Ratings | 1000VDC |
| Rated Voltage | 1000VDC |
| Rated Current | 15A |
| Protection Degree | IP65 |
| DC Fuse | 1000VDC, 10×38mm, 15A; qty 8 |
| DC SPD | 1000VDC, 2P, 40kA, Type 2; qty 1 |
| Dimensions | 380x230x121.5mm (18 ways) |
| Enclosure | 18 Ways, IP65, PC material |
| Input Strings | 4 |
| Main Switch | 1000VDC, 63A 4P DC MCB; qty 1 |
| Operating Temperature | -25°C to +55°C |
| Output Strings | 1 |
| Poles | 4P |
| Protection Degree | IP65 |
| Rated Current | 15A |
| Rated Voltage | 1000VDC |
| System Voltage | 1000VDC |
Product Overview
Four-string 1000V combiner for small commercial and residential ground-mount systems where four strings share a conduit and feed one inverter MPPT input. At 4 × 12A Isc, the 48A combined output remains within the cable and protection limits of typical home run designs.
4-string combiners are one of the most common configurations for residential and small commercial ground-mount systems where cost efficiency, array layout, and inverter MPPT count align around 4 strings per combiner.
Four-string 1000V combiners are the standard unit in 20–50kW commercial string inverter installations where each MPPT input aggregates four strings. Verify MPPT input current rating on the inverter data sheet against the aggregate of four string Isc values at site-specific peak irradiance conditions.
Applications
PV string combining
DC array protection
C&I rooftop solar
Utility-scale field combiner circuits
Frequently Asked Questions
Can a 4-string combiner be used with a multi-MPPT inverter?
Yes — but if each MPPT input must be fed separately, use a 4-string combiner with 4 outputs instead of 4-in/1-out. For systems where 4 strings share one MPPT input, the standard 4-in/1-out combiner is correct.
What is the output cable cross-section for 48A combined current?
A 6mm² or 10mm² DC cable in conduit typically handles 48A depending on installation method and ambient temperature. Confirm the cable cross-section with the electrical designer against the derating factors for the specific installation.
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