The Victron Anti-Islanding Box 63A is a grid protection device for single and three phase solar PV installations. It disconnects the inverter from the grid during a fault or outage, stopping the inverter from feeding power into a de-energised network. This is a mandatory safety requirement for grid-connected systems across the UK and much of the EU.

Key features

• Rated at 63A for single phase and three phase grid-connected PV systems.
• Disconnects automatically from the grid during a fault or outage to prevent islanding.
• Built to support grid protection requirements for UK and EU grid-tied installations.
• Works with Victron inverter and inverter/charger systems in grid-connected setups.
• Housed in an enclosure suitable for a distribution board or dedicated enclosure.
• Supports compliance with grid disconnection requirements under G98 and G99 in the UK.

How it works

Anti-islanding protection is a legal requirement for any inverter tied to the public grid. Without it, an inverter could keep energising the local network after a grid outage, which is a hazard for utility workers and equipment. This unit disconnects automatically when the grid fails and reconnects once supply is restored and stable.

The 63A rating covers single phase residential and light commercial systems as well as three phase installations up to that current. One unit handling both configurations removes the need for separate devices depending on installation type.

Applications

• Grid-connected solar PV systems needing anti-islanding protection under G98 or G99.
• Single phase residential or light commercial Victron inverter installations.
• Three phase commercial PV installations with Victron inverter/charger equipment.
• Retrofit grid protection for existing Victron grid-tied systems.

Installation notes

Fitting must be carried out by a qualified electrician familiar with grid-connected PV systems and current UK wiring regulations. UK grid-tied installations require G98 or G99 compliance and notification to the relevant Distribution Network Operator. Confirm the full requirements with your DNO before installation.

What's in the box

• 1 x Victron Anti-Islanding Box 63A (single and three phase)