CNLonQcom 2-String Solar PV Combiner Box IP65 — 32A DC500V Breaker, Surge Protector & 15A Fuses

The CNLonQcom 2-String Solar PV Combiner Box is a weatherproof, IP65-rated junction box that combines two PV strings into a single protected DC output with a 32A breaker, surge protection and 15A fuses for safe, tidy solar connections.

This combiner box streamlines wiring between your solar array and inverter by joining two input strings into one protected output. Built from UV-resistant PC+ABS and pre-wired with PV-rated cables and a grounding lead, it’s designed for outdoor rooftop, RV, boat and small commercial solar installations where reliable DC protection and simple maintenance matter.

How does this combiner box simplify solar system wiring?

Instead of running separate conductors from each panel string to the inverter, this unit consolidates two strings at the array edge, reducing cable runs and installation time. It arrives pre-wired and wall-mount ready so installers can connect positive and negative inputs, the output cable, and ground quickly.

• Two PV inputs with 10 AWG PV1-F pre-wired jumpers
• One DC output protected by a 32A DC500V MCB
• Included ground wire and wall-mount hardware for fast mounting

What electrical protections are built into this box?

The combiner integrates multiple layers of DC protection to guard against common electrical faults in PV arrays. It features a Type 2 surge protector for transient overvoltage events, individual 15A PV fuses per string, and a 32A circuit breaker on the combined output to manage overload or short-circuit conditions.

• 32A DC500V circuit breaker for output overcurrent protection
• DC500V T2 surge protection device to limit transient voltage spikes
• 15A DC1000V fuses on each string for localized fault isolation

Is the enclosure suitable for outdoor use and harsh environments?

Yes — the housing is IP65-rated to repel dust and water spray, and the PC+ABS construction provides UV resistance and flame retardancy for long-term outdoor exposure. The durable casing and gasketed lid make it suitable for rooftops, exterior walls, boats and RV installations where weather and sun exposure are concerns.

• IP65 rating for dust-tight and water-spray protection
• UV-resistant, flame-retardant PC+ABS material
• Gasketed cover and corrosion-resistant terminals for outdoor longevity

What system sizes and configurations does this box support?

This combiner is intended for small to medium off-grid or grid-tied arrays. It supports common low-voltage systems and provides guidance on maximum supported wattages per system voltage so you can match it to your panels and inverter capacity.

• Supports up to 360W at 12V systems, 720W at 24V, and 1,440W at 48V
• Maximum input current 15A per string; combined output up to 32A
• Suitable for rooftop arrays, RV/boat solar setups, and small commercial arrays

Who is this for? Installers, DIY solar enthusiasts and system designers working on small to medium PV installations who want a compact, pre-wired solution that adds overcurrent, surge and fuse protection at the array. It’s a practical choice when you need a weatherproof, easy-to-install combiner to tidy wiring runs, add safety disconnects and protect equipment from overload and transient events.