A marine isolation transformer is an essential component designed to enhance the electrical safety and performance of boats and yachts. This device isolates the boat's electrical system from the shore power, preventing galvanic corrosion and reducing the risk of electrical shock hazards.
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1-2 weeks delivery time Victron Isolation Transformers are essential safety components in professional marine AC installations. Available in 2000W, 3600W, Auto 3600W (auto-sensing 115/230V), and 7000W models, they eliminate galvanic corrosion risk and ensure safe shore power isolation. With toroidal winding for low noise and high efficiency, all models include soft start technology to prevent inrush tripping and feature IP21-rated aluminum enclosures.
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€ 475,73
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1-2 weeks delivery time Victron Autotransformers are engineered for step-up, step-down, and 120/240V split-phase output balancing. They solve common load unbalance issues in split-phase systems, making full use of available power. Ideal for grid, generator, or inverter-based systems, the transformers include a built-in ground relay and thermal protection. Available in 32A and 100A versions, they feature toroidal design, IP21 aluminum enclosures, and are safer, quieter, and more efficient than stacked inverter setups.
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€ 539,68
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1-2 weeks delivery time Victron Energy Galvanic Isolators VDI-16, VDI-32, and VDI-64 prevent electrolytic corrosion by blocking low-voltage DC currents entering through the shore power ground. Rated for 16A, 32A, and 64A respectively, these isolators feature anodized aluminium heat sinks, IP67 waterproof housing, and M6 connections. Designed for marine environments, they ensure safety without compromising the grounding path.
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€ 131,27
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1-2 weeks delivery time The Mastervolt Mass Systemswitch Automatic Power Supply Selection System is an advanced electronic system designed to seamlessly control onboard electrics. With three AC inputs, up to four outputs, and a user-friendly display panel, it ensures safe and efficient power transmission from 4.5 kW to 16 kW. Supporting currents between 25 A and 63 A, it offers a reliable solution for managing multiple 230 V power sources on any vessel.
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€ 1.850,41
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1-2 weeks delivery time The Mastervolt Mass GI Isolation Transformer is a compact and lightweight solution for safely connecting your vessel to an onshore power supply. With advanced high-frequency electronics, it supports both 120V and 230V AC systems. Features like vibration-free operation, integrated Soft Start, and optional remote control via MasterBus panels make it ideal for marine applications. Available in 3.5 kW and 7.0 kW models.
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€ 1.543,15
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1-2 weeks delivery time The Victron Energy ITR040202041 is a 2000W marine-grade isolation transformer designed for 115V or 230V AC shore power systems. With a soft start function to prevent breaker tripping and full galvanic isolation, it eliminates the risk of corrosion caused by DC stray currents. Housed in a durable aluminum enclosure (IP21) and compliant with EN 60076 standards, this toroidal transformer ensures both safety and compatibility across global shore power sources. Dimensions: 375 × 214 × 110 mm. Weight: 10 kg.
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€ 475,73
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1-2 weeks delivery time The Victron Energy ITR040362041 is a high-capacity 3600W isolation transformer engineered to protect vessels from galvanic corrosion while safely interfacing with 115V or 230V shore power. This toroidal transformer supports both voltages, operates at 50/60Hz, includes a soft-start circuit to prevent breaker trips, and is housed in a durable aluminum IP21-rated enclosure. With 32A/16A rated capacity and internal circuit protection, it's ideal for larger yachts and demanding shore-to-board electrical conversions. Dimensions: 362 × 258 × 218 mm. Weight: 23 kg.
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€ 715,84
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1-2 weeks delivery time The Victron Energy ITR000702001 is a powerful 7000W isolation transformer built for demanding 230V marine applications. Designed to eliminate galvanic corrosion and ensure safe electrical separation from shore power, this model supports 32A continuous load, includes a soft start to prevent breaker trips, and features a toroidal core for low noise and minimal electromagnetic interference. Housed in a robust aluminum IP21-rated enclosure, it meets EN 60076 safety standards and is ideal for large vessels or heavy-duty systems. Dimensions: 362 × 258 × 218 mm. Weight: 31 kg.
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€ 977,26
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1-2 weeks delivery time The Victron Energy ITR050362041 is a smart 3600W isolation transformer with automatic voltage switching between 115V and 230V input. It ensures galvanic isolation from shore power, protects onboard systems from electrolytic corrosion, and supports global docking scenarios. Featuring a toroidal design, soft start function, and internal breaker, this transformer combines high safety, quiet operation, and plug-and-play adaptability. Dimensions: 362 × 258 × 218 mm. Weight: 24 kg. Rated for 32A at 115V or 16A at 230V.
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€ 756,23
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1-2 weeks delivery time The Victron Energy ITR000100001 is a 32A autotransformer engineered for 120/240V AC applications requiring step-up/step-down conversion or split-phase load balancing. Ideal for marine, off-grid, or hybrid inverter systems, it mitigates power imbalances and maximizes system efficiency. This toroidal transformer includes a built-in ground relay for proper GFCI operation, automatic overheat protection with manual reset, and a dual-pole 32A circuit breaker. Housed in a durable aluminum IP21-rated enclosure. Dimensions: 425 × 214 × 110 mm. Weight: 12.5 kg.
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€ 539,68
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1-2 weeks delivery time The Victron Energy ITR000100101 is a high-capacity 100A autotransformer for 120/240VAC applications requiring robust voltage step-up/down, split-phase balancing, or inverter configuration support. It features a toroidal design for low noise and high efficiency, built-in ground relay for GFCI compatibility, and automatic thermal protection. Ideal for large marine or off-grid systems handling asymmetric loads or generator balancing. Enclosed in a durable IP21-rated aluminum housing. Dimensions: 425 × 214 × 110 mm. Weight: 13.5 kg.
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€ 609,25
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1-2 weeks delivery time The Victron Energy GDI000016000 (VDI-16) is a 16A-rated galvanic isolator designed to block low-voltage DC galvanic currents between shore power and the boat’s hull, protecting underwater metals such as shafts and propellers from electrochemical corrosion. Housed in a fully waterproof IP67-rated anodized aluminum casing, it features M6 terminals for secure connection, and is optimized for safe, reliable operation in marine environments. Dimensions: 60 × 120 × 200 mm. Weight: 1 kg. Peak current rating: 1600A (20 ms).
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€ 131,27
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1-2 weeks delivery time The Victron Energy GDI000032000 (VDI-32) is a 32A galvanic isolator designed to protect boats connected to shore power from electrolytic corrosion. It blocks low-voltage DC currents that cause galvanic action through the safety ground while maintaining full compliance with AC safety standards. Housed in a rugged, IP67-rated anodized aluminum enclosure, the VDI-32 is completely waterproof and built to operate reliably in harsh marine conditions. Dimensions: 63 × 164 × 200 mm. Weight: 2 kg. Peak current capacity: 3200A (20 ms).
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€ 298,45
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1-2 weeks delivery time The Victron Energy GDI000064000 (VDI-64) is a 64A-rated galvanic isolator designed for large vessels with high shore power loads. It protects valuable underwater metal components from galvanic corrosion by blocking low-voltage DC currents while maintaining AC ground continuity for safety. Built with a fully potted waterproof IP67 anodized aluminum enclosure and M6 terminals, it handles peak fault currents up to 6000A (20 ms). Dimensions: 63 × 164 × 335 mm. Weight: 3.2 kg.
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€ 365,77
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1-2 weeks delivery time The Mastervolt Mass GI 3.5 kW Isolation Transformer (88000355) is a high-frequency galvanic isolator designed to safely connect onboard systems to shore power while eliminating the risk of galvanic corrosion. Operating on 90–255 V AC at 45–65 Hz, the unit supports 3.5 kW continuous power (16 A @ 230 V) with >93% efficiency. Up to four units can be parallel-coupled for increased capacity (14 kW total). Lightweight (6 kg) and compact (340 x 261 x 144 mm), it features integrated Soft Start, silent operation, MasterBus compatibility, and professional-grade wiring terminals, making it ideal for modern marine AC installations.
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€ 1.570,80
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1-2 weeks delivery time The Mastervolt Mass GI 7 kW (88000705) is a high-performance galvanic isolation transformer engineered for safe and corrosion-free connection between shore power and onboard AC systems. With an output capacity of 7000 VA (32 A at 230 V), it operates over a broad input range (90–255 V, 45–65 Hz) and achieves >93% efficiency through high-frequency switching technology. Featuring Soft Start, MasterBus compatibility, and compact aluminum housing, this unit is ideal for high-load marine installations. Its compact form factor (340 x 261 x 250 mm) and silent operation ensure flexible mounting and long-term system protection.
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€ 2.805
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1-2 weeks delivery time The Mastervolt Transfer System 120/230V – 6kW (55010600) is an automatic AC power transfer switch designed to seamlessly adapt incoming grid voltages for onboard systems. Rated at 6,000 W, it enables safe operation of 230 V/50 Hz electrical systems on 120 V/60 Hz shore power, such as in North America or the Caribbean. Used in combination with an IVET transformer and optional Soft Start, it suppresses inrush currents and ensures uninterrupted operation of sensitive onboard electronics.
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€ 1.997,16
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1-2 weeks delivery time The Mastervolt IVET 4.5kW Isolation Transformer (85000450) is a high-performance, heavy-duty E-core unit designed for professional marine electrical installations. Supplied without casing for direct integration, this multi-tap transformer supports input and output voltages of 120 V, 230 V, or 240 V, offering flexible deployment across international shore power systems. Measuring approximately 260 x 230 x 210 mm and rated for 4.5 kW, it ensures galvanic isolation between onboard and shore systems to prevent electrolysis and corrosion. Compatible with optional Soft Start modules to reduce inrush current and avoid fuse trips.
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€ 2.161,50
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1-2 weeks delivery time The Mastervolt IVET 6kW (85000600) is a high-performance E-core galvanic isolation transformer engineered for safe marine installations. Designed without casing for direct integration, it provides electrical isolation between shore power and onboard systems to prevent galvanic corrosion. Supporting 120/230/240 V multi-tap configurations, this transformer offers 6000 W of power capacity and is compatible with optional Soft Start modules to prevent power surges. Dimensions and detailed specs make it ideal for custom installations in demanding environments.
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€ 2.523,87
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How does an isolation transformer protect against galvanic corrosion in a marine environment?
An isolation transformer protects against galvanic corrosion in a marine environment by electrically isolating the onboard AC system from the shore power. This separation prevents stray current from flowing between the vessel and the marina's dock, which can cause electrolytic corrosion of metal hulls, underwater fittings, and thru-hulls. By using a toroidal transformer, the system ensures safe and uninterrupted AC power, providing peace of mind for boat owners.
How does shore power connect to a boat using a marine isolation transformer?
Shore power connects to a boat using a marine isolation transformer by plugging the shore AC power into the boat's power inlet, which is then routed through the isolation transformer. This transformer, such as those from Victron Energy, safely transfers electricity while preventing electrolytic corrosion and ensuring correct polarity, thereby creating a safe and stable AC system on board. The isolation transformer’s soft start circuitry and ability to handle shore ground interruptions ensure that the circuit breaker will not trip, maintaining continuous power for onboard systems like TVs and refrigerators.
How does a galvanic isolator work in conjunction with a 120V marine isolation transformer?
A galvanic isolator works in conjunction with a 120V marine isolation transformer by interrupting low voltage galvanic currents that can cause corrosion on your boat’s metal parts, such as outdrives and aluminum hulls. During the installation, the galvanic isolator is placed between the shore power connection and the boat’s AC electrical system, providing a safe electric system by ensuring that harmful currents do not bond with the boat’s metal components. This setup prevents the shore circuit breaker from tripping when plugged in at the marina, maintaining a stable and protected power supply for your vessel.