3-In-1-Out Combiner Box (600V DC) (disassembled)

A compact, professional 3-string PV combiner kit for rooftop and ground-mount arrays up to 600V DC. Supplied disassembled for on-site layout and wiring, it includes gPV string fusing and Type 2 DC surge protection in an IP65 enclosure. Ideal between PV strings and the inverter’s PV input when you need neat, serviceable protection and a single positive/negative output pair.

What’s included (disassembled kit)
• 1 × IP65 UV-stabilised polycarbonate enclosure (wall-mount, hinged cover)
• 1 × DIN rail with end-stops
• 3 × 10×38 DC gPV fuse-holders (string positive) + 3 × gPV fuse-links (15 A as standard)
• 1 × Type 2 DC surge protection device, 600V DC (± to PE), with status indicator
• 1 × Earth/PE bar + earth stud & strap
• DC+ / DC− terminal blocks or busbar set for combined output
• Cable glands & blind plugs (string entries and single combined output)
• Pre-printed PV safety labels and wiring diagram (generic)

Key features
• 3 inputs to 1 output, tidy serviceable layout (fusing + SPD included)
• 600V DC rating for typical small/medium arrays (check cold-weather Voc)
• Type 2 DC SPD to protect downstream equipment (± to PE)
• IP65 outdoor-ready enclosure; UV-stable; lockable cover area
• Supplied disassembled for flexible routing and component placement

Technical specs (summary)
• Max system voltage: 600 V DC
• Strings in / out: 3 in (P+/N−), 1 out (P+/N−)
• String fusing: 10×38 gPV; 15 A fitted (change per design/Isc if required)
• SPD: Type 2, nominal 600 V DC, modes +/− to PE
• Enclosure: IP65 polycarbonate, grey/clear lid (model dependent)
• Typical operating temp: −20 °C to +60 °C
• Gland set: entries for 3 string pairs + 1 output pair (sizes vary by cable O.D.)
• Earthing: internal PE bar with M6 stud

Compatibility / use
• For PV DC side only (not AC, not battery DC).
• Size string fuses ≥ 1.25 × string Isc and ≤ component limits.
• Ensure array Voc at the site’s minimum temperature remains ≤ 600 V DC.
• Route combined output to the inverter PV input via appropriately sized DC isolator if required by your design.

Not included (plan for these)
• External DC isolator (if not integrated at inverter), additional surge protection upstream/downstream as required
• Crimp lugs/MC4s, trunking, labeling beyond included kit, cable, and installation materials
• Installation, commissioning, and COC/SSEG paperwork

Installation & compliance (South Africa)
• Install and wire by a qualified person to SANS 10142-1 and PV best practice.
• Torque all terminals to spec; verify polarity; test SPD/fuse continuity.
• Apply supplied PV danger and isolation labels.