The MPPT WireBox-XL MC4 is a protective wiring enclosure for Victron SmartSolar and BlueSolar MPPT charge controllers in the 150-85, 150-100, 250-85 and 250-100 VE.Can range. It covers the DC wiring terminals and MC4 PV connections, giving a tidy and protected finish once installation is complete.

MPPT WireBox-XL MC4 key features

• Compatibility, fits Victron MPPT 150-85, 150-100, 250-85 and 250-100 VE.Can charge controllers.
• Connector type, MC4 variant, routing MC4 PV input connections through the enclosure.
• Terminal cover, encloses all DC wiring terminals against accidental contact and environmental ingress.
• XL sizing, extra clearance for the larger cable cross-sections used on high-current installations.
• Weight, 0.275 kg, with a clip-fit design for quick fitting.
• Standalone accessory, can be retrofitted to existing compatible controllers.

Product overview

The WireBox-XL is the larger variant in Victron's WireBox range, sized for the 85A and 100A VE.Can MPPT controllers. Once wiring is complete, it forms a physical barrier over the terminal area, reducing the risk of accidental short circuits during later work near the installation.

The MC4 version suits installations where the PV array connects via MC4 connectors rather than bare cable terminations. Connections route cleanly through the cover without needing the connectors cut or bypassed, which helps where PV cabling may need disconnecting and reconnecting for maintenance.

Applications

Used on commercial rooftop solar installations with Victron VE.Can MPPT controllers, off-grid systems needing terminal protection, and marine or vehicle installations where exposed terminals are a hazard. It also suits retrofitting onto existing 150/250 VE.Can controllers that need better terminal enclosure.

What's in the box

• 1 x MPPT WireBox-XL MC4 enclosure

Installation notes

Fit the WireBox only after all DC and PV wiring is complete and correctly torqued, with connections de-energised. It suits only the VE.Can variants of the 150-85, 150-100, 250-85 and 250-100 controllers, not non-VE.Can or smaller MPPT models. Installation of the charge controller itself should be carried out by a qualified electrician or accredited solar installer.