Solar PV distribution

Solar PV Combiner & Connection Equipment

Make every string, protection point and downstream interface easier to review before the quotation is released.

Request a configuration review Review technical scope

NEUTRON solar PV DC combiner box with enclosure, lockable handle and cable glands

Purchase readiness

Move from product interest to a review-ready request.

Pricing is confirmed per configuration and quotation. Project builds are engineered to spec; final ratings, documents and delivery are confirmed before quotation.

MOQ: 1 unit
FOB: Ningbo / Shanghai
Standard lead time: 3-5 days
Project lead time: 5-30 days
Sample route: 3-5 days

Get a configuration quote Solar PV Combiner & Connection Equipment

System inputArray, inverter or electrical drawing

ConfigurationScope checked before quotation

Document basisDrawing, BOM and required records

Project reviewTechnical details aligned before release

Solar PV combiner equipment installed on a commercial rooftop array

Review point 01

The string arrangement is unclear at quotation stage.

Review input/output grouping, protection, isolation and monitoring requirements against the array and inverter design.

Electrical design and interfaces
Installation and enclosure conditions
Document package before release

PV combiner equipment beside a utility-scale solar array

Review point 02

Outdoor conditions create enclosure and cable-entry risk.

Confirm installation environment, enclosure requirements, connector system and service access before release.

Electrical design and interfaces
Installation and enclosure conditions
Document package before release

Custom and generic PV combiner enclosures compared in a clean studio

Review point 03

A generic box does not fit the project document package.

Align the technical response with the single-line diagram, layout, BOM and required inspection documents.

Electrical design and interfaces
Installation and enclosure conditions
Document package before release

Configuration families

Find the DC or AC boundary that fits the project.

Each family leads to a model matrix, source-backed product images and the technical questions needed before quotation.

DC Isolator Switch Boxes

Isolation and string-side switching for defined DC circuits.

4 available configurationsExplore family →

Door-Clutch DC Combiner Boxes

Door-clutch enclosures with DC string aggregation and project-defined protection.

7 available configurationsExplore family →

DC Breaker and Over-Current Boxes

DC breaker-led protection arrangements for defined string and feeder interfaces.

10 available configurationsExplore family →

Standard DC String Combiner Boxes

Standard DC string aggregation configurations for PV array interfaces.

16 available configurationsExplore family →

DC and AC Combiner Boxes

Integrated DC and AC collection boundaries for compact project-defined scopes.

2 available configurationsExplore family →

AC Distribution and Protection Boxes

AC distribution, RCD and contactor arrangements for downstream PV interfaces.

5 available configurationsExplore family →

PV Waterproof Enclosures

Outdoor-ready PV enclosure starting points for equipment and DIN-module arrangements.

7 available configurationsExplore family →

AFCI Combiner Box

AFCI combiner configuration for project-defined DC arc-fault review.

1 available configurationsExplore family →

High-String DC Disconnect Combiners

High-string 1000V/1500V DC disconnect configurations for PV collection systems.

6 available configurationsExplore family →

AC Combiner Boxes

AC combiner configurations for multi-inverter collection and distribution interfaces.

9 available configurationsExplore family →

Technical scope

Specifications structured for a project review.

System voltage	Select against array design and inverter architecture
String / feeder arrangement	Input and output count confirmed from the approved single-line diagram
Protection functions	Fuse, isolation, surge and monitoring scope reviewed per requirement
Enclosure and cable entry	Outdoor/indoor environment, connector and service access to be defined
Mounting arrangement	Wall, skid or cabinet integration according to the site layout
Release package	GA drawing, BOM, wiring/interface details and inspection records as required

Solar PV array to AC distribution system flow

Applications

Make the product conversation fit the operating context.

Utility-scale solar

EPC, IPP and power project teams

Array aggregation, DC isolation and project documentation

Commercial rooftop PV

Industrial and commercial site owners

Defined cable entry, outdoor installation and inverter interfaces

Distributed packages

Installers and system integrators

Compact arrangements selected around the approved string design

Technical resources

Get the documents that move the review forward.

Catalogue

Product catalogue

Overview material for comparing the family and identifying the next technical question.

Request through project inquiry ->Technical pack

Datasheet and GA drawing

Model-level files matched to the confirmed configuration and revision.

Request through project inquiry ->Project set

OEM / project document set

Define the BOM, interface, inspection and handover documents for the workflow.

Request through project inquiry ->

Related insights

Selection guidance and project checks connected to this product family.

Browse all Insights

01Solar PV

Solar Panel Dimensions and Weight: A Practical Sizing Reference

Module dimensions and mass look like a mechanical detail, yet they are the first numbers an electrical engineer needs before any balance of system (BOS) can be specified. Panel footprint sets the row pitch, the cable run length between the array and the enclosure, and the amount of free wall or rail space available for a combiner box. Panel mass sets the structural load the roof or the ground frame must carry. NEUTRON does not manufacture modules. As a supplier of PV combiner equipment, DC control and protection assemblies and low-voltage distribution gear, our starting input is always the module datasheet: dimensions, weight, cell count and electrical ratings. This reference explains what the common sizes are and how they translate into practical decisions about string layout, conductor length and enclosure placement.

Read technical guide 02Electrical Protection

Solar Fuses and Breakers: DC String Fuse and AC Breaker Sizing

Overcurrent protection on a photovoltaic array is not a scaled-down version of ordinary circuit protection. Direct current has no natural zero crossing to help extinguish an arc, an array is a current-limited generator that may never produce enough fault current to operate an oversized device, and the fault current can flow in either direction on a shared busbar. These three characteristics dictate a dedicated approach to fuse and breaker selection. Sizing direct-current string protection and coordinating it with the alternating-current breaker downstream is core work for NEUTRON, which manufactures PV combiner equipment, DC control and protection assemblies and low-voltage switchgear. This guide sets out the sizing rules, the applicable standards, and the coordination and mistakes that most often appear during commissioning.

Read technical guide 03Solar PV

Cloud-Edge Effect: Why Solar Panels Exceed Rated Power

Anyone who watches a photovoltaic monitoring screen on a partly cloudy day sees something that appears impossible: for a few seconds the array reports more power than the modules are rated to produce. This is the cloud-edge effect, and it is a genuine optical and electrical phenomenon rather than a measurement error. It matters because protection equipment sized for average conditions will be tested by these brief peaks. For NEUTRON, which supplies PV combiner equipment, DC control and protection assemblies and busbar and distribution components, over-irradiance events are a sizing input. Fuses, busbars, isolators and conductors have to tolerate the peak rather than the mean. This article explains the mechanism and then works through what margin the balance of system actually needs.

Read technical guide 04Electrical Protection

MC4 Solar Connectors: Types, Selection and Crimping

The MC4 style connector is the smallest component in a photovoltaic array and the most frequent point of failure. It carries full string current for decades, sits outdoors in ultraviolet light and driving rain, and is usually terminated by hand on a roof under time pressure. NEUTRON builds the direct-current combiner boxes and protection equipment that these connectors feed, which means every badly crimped contact eventually shows up as a hot terminal or a tripped fuse inside our enclosures. This guide covers selection, termination and inspection from that receiving end.

Read technical guide

Continue the system review.

Energy storage integration

Energy storage control

Bring BMS, PCS, EMS, protection and communications into one reviewable control scope.

Low-voltage draw-out switchgear cabinet assembly with compartment doors

Low-voltage distribution

LV switchgear

Move from a cabinet name to a buildable distribution arrangement with the right interfaces, access and documentation.

DC control panel cabinet with monitoring and protection components

Protection and control

DC control & protection

Keep control, protection, alarm and documentation interfaces visible from the first technical review.

FAQ

Questions buyers usually ask before sending an RFQ.

Can the number of PV inputs be customized?

The starting point is the approved string arrangement. Available standard and customized configurations are confirmed during the engineering review.

Can the configuration be adapted to our project drawing?

Yes. The product-family page is a starting point. Final enclosure arrangement, component selection, interfaces and documentation are confirmed against the approved drawing, load schedule or technical brief.

What should we send for a useful first quotation?

A single-line diagram, target ratings, quantity, installation environment, delivery destination and any required standards or document list will help the engineering review start with the right assumptions.

Can NEUTRON support OEM or project-specific assembly?

The review can include OEM, drawing-led assembly and project-specific integration requirements. Scope, interfaces, inspection points and document ownership are agreed before release.

Are the figures on this page a final product datasheet?

No. This page explains the product family and the information needed for selection. The approved datasheet, drawing and quotation are the controlling documents for a specific project.

Next step

Share the requirement, not just the product name.

Application, destination, quantity, target ratings and document requirements make it easier to prepare a relevant response.

Send an RFQ brief