1000V DC Combiner Box 2 In 1 Out MCB type

The 1000V DC Combiner Box 2 In 1 Out MCB type, supplied by China manufacturer Zhejiang Soutya New Energy LLC, is a 1000 V DC photovoltaic string-aggregation unit built for compact, high-performance outdoor service. Moulded from UV-stabilised polycarbonate and sealed to IP65, the enclosure shields internal components from dust, moisture and prolonged solar exposure. Inside, four DC fuse holders provide over-current protection for two input string, a class II DC surge protective device (SPD) clamps induced transients, and a single two-pole DC miniature circuit breaker (MCB) delivers both load-switching and short-circuit isolation. Factory-pre-wired positive, negative and PE buses guarantee low-impedance equipotential bonding, while the 2-in 1-out configuration streamlines cabling on small rooftop or triple-string sub-arrays. The design offers safe, visible-break maintenance isolation and essential string-level protection within a space-saving, wall-mount footprint.

Technical Parameter

Wiring Diagram

Application scenarios

1.PV string consolidation – Small rooftop arrays

Installed beneath modules or on parapet walls, the box merges two PV strings into a single DC output. Four fuse holders provide individual string over-current protection, while the Class II SPD clamps induced surges from nearby lightning activity. A front-operated MCB delivers visible-break isolation, allowing safe lock-off during inverter maintenance or rooftop interventions.

2.Agricultural DC feeders – Irrigation and livestock systems

Wall-mounted in pump houses or barn lofts, the unit supplies solar-generated DC to brushless pumps and milking equipment. IP66 sealing excludes grain dust and high-pressure wash-down water, and the integrated MCB permits rapid shutdown before seasonal equipment checks or belt replacement.

3.Remote telecom shelters – Critical communication power

Positioned inside tower compounds, the combiner feeds DC busbars that power radio heads and battery banks. The SPD safeguards sensitive RF electronics against transient over-voltages, while the MCB acts as a local disconnect for technicians performing tower earthing measurements or rectifier swaps.

4.Residential cluster arrays – Apartment block PV branches

Fixed within meter cupboards or attic trusses, the enclosure consolidates two module strings for shared inverter use. Fire-retardant polycarbonate and string-level fusing enhance safety in populated buildings, and the MCB gives emergency responders a single labelled point to isolate the DC side during a fire event.

5.Industrial micro-grid nodes – Backup and peak-shaving circuits

Flange-mounted on skids that couple PV with forklift chargers or PLC racks, the box handles 15 kW of solar input. The dual-string capability matches peak-shaving demand profiles, and the coordinated SPD + MCB pair shields sensitive drives from both grid spikes and inverter commutation noise.