RV Solar MC4 Branch Connectors, Inline Fuses & Disconnect Guide

Parallel solar connections, string fuses and DC isolation each perform a different job in an RV photovoltaic system. This illustrated reference helps distinguish the Go Power 67049 / 67050 connector pair, Renogy 0022121 inline fuse and AIMS DC solar disconnect switches. The parts below are actual items in our catalog.

Follow the solar array components

When multiple compatible PV modules are wired in parallel, correctly matched branch connectors bring their output together. Any required string overcurrent protection and DC-rated disconnection must be selected for that array. The controller then manages battery charging according to its own input limits.

Solar panel stringsPanel-positive and panel-negative circuits with compatible mating connectors
Parallel branch and string protectionCorrect connector pair, and separately rated fuses where needed
DC isolation and MPPT controllerCorrect PV disconnect and appropriately rated controller input
Original conceptual component flow only. It is not an electrical circuit drawing, a two-polarity wire schematic or an instruction to connect different PV strings in parallel.
Branching

Combines parallel panel currents. The SC-BC-1M2F and SC-BC-1F2M differ in connector gender and work on opposite polarity sides of an approved arrangement.

Overcurrent protection

An inline 20A solar fuse is not universal. Its rating must match conductor protection, the PV module's maximum series fuse rating and array design.

Isolation

A DC-rated switch permits array isolation when properly installed. Voltage, current, poles and circuit configuration must match the actual PV system.

Model-number reference

Exact component Identification Role
Go Power SC-BC-1M2F / 67049 1 male / 2 female A branch connector of one polarity orientation
Go Power SC-BC-1F2M / 67050 1 female / 2 male The matching opposite-polarity branch
Battle Born BBCBL-47 4-to-1 connector pair For combining parallel solar leads, where approved
Renogy 0022121 20A inline fuse assembly String overcurrent protection when specified
AIMS DC1200V32A / 1005959 PV-rated DC disconnect Isolation equipment; must match actual array conditions
AIMS DC1600V32A2IO / 1004532 Dual-input/output DC disconnect Different model and connection arrangement

Connector housings that appear to fit are not automatically approved mating pairs. Check connector manufacturer, rating and contact compatibility. The number and direction of branches must be determined from the solar panel and controller installation instructions, not from connector appearance.

Shop branch, fuse and disconnect components

Solar branching components

PV fuse and DC disconnect components

Original manufacturer product references

For a safe system design, consult the exact module datasheet, wire and connector ratings, controller manual, and the documentation for the protective devices. The manufacturer resources below provide further details about the referenced parts.

Go Power solar branch connector references · Renogy inline fuse product reference · AIMS Power disconnect product resources

Solar safety: Do not disconnect loaded PV connectors or assume that an MC4 connection can be opened under current. Follow the equipment-specific isolation procedure and applicable codes. Photovoltaic circuits may remain energized in daylight; qualified solar/RV electrical installers should select conductor size, DC protection and system architecture.

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