The Victron MPPT WireBox-S 100-15 is a protective wiring enclosure made for the Victron SmartSolar and BlueSolar MPPT 100/15 solar charge controllers. It covers the electrical terminals to prevent accidental contact and helps keep the installation tidy.

Key features

• Fitment, designed specifically for the Victron MPPT 100/15 solar charge controller.
• Terminal protection, covers PV and battery terminals to prevent accidental contact with live connections.
• Cable management, supports a cleaner cable entry and exit arrangement at the controller.
• Weight, 0.15 kg.
• Fitting, snap-fit design for attachment to the compatible MPPT unit.

Product overview

The WireBox-S is a terminal cover accessory made by Victron Energy for its smaller MPPT charge controller range. The 100-15 designation confirms it is built for the MPPT 100/15 model. Once fitted, it shields the battery and solar PV wiring terminals from accidental touch, which matters where the controller sits somewhere accessible, such as a van, boat, or small off-grid cabin.

It also helps keep the wiring layout organised. Cables route through the enclosure in a controlled way, which reduces strain on the terminal connections over time. For installers, it is a simple addition that improves both safety and the finished look of the job.

Applications

• Van and motorhome solar installations where the MPPT controller is within reach of occupants.
• Marine and narrowboat 12V solar systems needing tidy terminal protection.
• Small off-grid cabins, sheds, or outbuildings fitted with a 100/15 MPPT controller.
• Any installation where terminal safety and cable management matter.

What's in the box

• 1 x Victron MPPT WireBox-S 100-15 terminal enclosure

Installation notes

The WireBox-S fits the Victron MPPT 100/15 only. Victron makes several WireBox variants for other MPPT sizes, so confirm your controller model before ordering. Fit the cover once wiring is complete, with all terminal connections correctly torqued and inspected beforehand. Where the charge controller is part of a wider solar PV system, installation should be carried out by a qualified electrician or a competent person familiar with DC solar wiring.