Victron Energy MPPT WireBox-Tr DC Terminal Cover

Overview

The Victron Energy MPPT WireBox - Tr is a terminal cover range for Victron MPPT solar charge controllers with Tr-style terminal areas. It covers the DC terminal screws on supported MPPT chargers, adding a physical barrier where solar array and battery cabling enter the controller.

This is a practical add-on for boat installations where the charge controller sits in a locker, technical compartment, cabin panel area, lazarette, or other space that may be reached during service or storage. The range covers Victron MPPT controller sizes from smaller 75/10 and 75/15 units through larger 150/85, 150/100, 250/85, and 250/100 models, with the WireBox size matched to the controller body and terminal layout.

Key features

• Covers all DC terminals to reduce the chance of accidental contact with terminal screws.
• Useful when an MPPT solar charger is mounted in a general access area on board.
• Matched sizing across S, M, L, and XL versions for different Victron MPPT controller families.
• Supports installations using compatible SmartSolar and BlueSolar MPPT charge controllers with Tr-type terminal layouts.
• Helps keep the wiring area more contained after the solar and battery cables are terminated.

Variants

This product range is supplied in different WireBox sizes, with each size matched to specific Victron MPPT solar charger models. The options vary by physical WireBox size and compatible controller rating, including S, M, L, and XL versions for controllers ranging from 75/10 and 75/15 up to 150/100 and 250/100.

The key buying detail is the compatible MPPT model, not the boat size or solar panel wattage by itself. Match the WireBox to the exact Victron charge controller model already installed or being added to the system, especially when replacing an existing controller cover or planning a new solar installation.

Installation and fit

The WireBox fits at the wiring end of the compatible MPPT charger so the DC terminals are covered after the conductors have been connected and tightened. In a marine installation, this is most useful when the controller is mounted where gear, hands, tools, or stored items may come close to the terminal area.

Before ordering, confirm the full controller model number, such as 100/30, 150/70, or 250/100, and match it to the listed compatible models for the selected variant. Similar-looking Victron MPPT chargers can use different WireBox sizes, so the controller rating is the safest way to confirm fit.

Use on board

This WireBox range is a good match for cruising boats, fishing boats, and workboats using Victron MPPT solar charging where the controller is not hidden behind a fully enclosed electrical panel. It is especially relevant for retrofit solar work, battery system upgrades, and locker-mounted charge controllers where a cleaner covered terminal area is preferred.