Victron Energy Shore Power Isolation Transformer, Soft Start, Toroidal Wound

Overview

The Victron Energy Isolation Transformers is a shore-power isolation transformer range for boats that need electrical separation between the marina supply and the onboard AC system. It is used in professional marine AC installations to break the direct shore-ground connection, helping protect immersed metal parts such as shafts, propellers, and through-hulls from galvanic corrosion while keeping the onboard AC system properly grounded on the vessel side.

The range covers 2000 Watt, 2500 Watt, 3600 Watt, and 7000 Watt models. The 2000, 2500, and 3600 Watt versions can be configured for 115/120 V or 230/240 V input and output, while the 7000 Watt version is for 230/240 V systems. The transformers operate on 50/60Hz systems, use toroidal transformer construction, include soft start, and have an aluminium enclosure with IP21 protection.

Key features

• Isolates the vessel AC system from shore power ground, helping reduce galvanic corrosion risk while connected at the dock.
• Supports common shore-power arrangements, including 115/120 V and 230/240 V configurations on the 2000, 2500, and 3600 Watt models.
• 7000 Watt model supports 230/240 V input and 230/240 V output for larger AC shore-power systems.
• Soft start helps limit transformer inrush current when shore power is connected.
• 50/60Hz compatibility for use with either frequency, while frequency conversion is not provided.
• Toroidal transformer construction keeps weight and operating noise lower than many conventional transformer layouts.
• Aluminium enclosure with IP21 protection and EN 60076 safety compliance for protected onboard installation spaces.

Variants

This product is offered in four power and voltage configurations for different onboard AC loads and shore-power layouts.

The main differences are the power rating and the supported input and output voltage arrangement. Across the range, the transformers share the same core purpose of shore-power isolation, galvanic corrosion reduction, soft start, 50/60Hz operation, toroidal construction, aluminium enclosure, IP21 protection, and EN 60076 safety compliance.

• ITR040202041: 2000 Watt power, 115/120 or 230/240 V input, and 115/120 or 230/240 V output. This version fits smaller AC installations where the boat may need a configured 120 V or 240 V output from shore power.
• ITR040252042: 2500 Watt power, 115/120 or 230/240 V input, and 115/120 or 230/240 V output. This rating suits moderate onboard AC loads with flexible voltage configuration for marina connections.
• ITR040362042: 3600 Watt power, 115/120 or 230/240 V input, and 115/120 or 230/240 V output. This version gives more capacity for vessels with a larger AC distribution panel or more shore-powered equipment.
• ITR000702002: 7000 Watt power, 230/240 V input, and 230/240 V output. This configuration is for higher-capacity 230/240 V shore-power systems where voltage conversion to 120 V is not required.

Electrical and system integration

The transformer is installed in the AC shore-power path between the shore inlet and the vessel AC distribution. The shore side connects to the primary side of the transformer, and the boat AC system connects to the secondary side, so the vessel side can be grounded without carrying the marina ground directly onto immersed metalwork.

A GFCI or RCD remains an important part of the onboard AC output side. The neutral-to-earth link on the secondary side is used so the protection device can trip correctly if a fault occurs on the vessel side of the installation.

Installation and fit

Mount the unit in a protected onboard location such as an electrical locker, machinery space, or dry technical compartment with suitable ventilation and access for wiring. The IP21 rating is not for exposed deck, cockpit washdown, or bilge locations where water spray or standing water can reach the enclosure.

AC shore-power work should be handled by a qualified marine electrician. Correct cable sizing, overcurrent protection, grounding, neutral bonding, and shore inlet wiring are all critical to safe operation on board.

Use on board

This range is a good match for cruising sailboats, motor yachts, workboats, and other vessels that spend meaningful time connected to shore power. It is especially useful where corrosion control and AC fault protection need to be addressed together rather than treating the shore-ground connection as a simple wiring detail.