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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT 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 Price incl. 19% VAT The Mastervolt 88000355 Mass GI Isolation Transformer is a reliable electrical component designed for efficient power distribution in marine and recreational vehicle applications. With a robust 3.5kW power rating, this transformer ensures a safe and secure electrical system on board.
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€ 1.570,80
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1-2 weeks delivery time Price incl. 19% VAT The Mastervolt 88000705 Mass GI Isolation Transformer 7kW is a high-performance, high-frequency isolation transformer that provides safe and reliable power transfer between shore installations and vessels. Its galvanic isolation technology protects onboard metal components from electrical corrosion, ensuring durability and safety in marine environments. Engineered with advanced high-frequency switching, this transformer is 75% lighter and 60% more compact than traditional low-frequency units, making it easy to install in tight spaces. Equipped with Soft Start functionality, it minimizes inrush currents, ensuring smooth connection to shore power and extending the lifespan of connected equipment. With a wide input voltage range from 90 to 255V and efficiency over 93%, the Mass GI operates with minimal heat and energy loss.
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€ 2.805
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1-2 weeks delivery time Price incl. 19% VAT The Mastervolt 55010600 Transfer System is an automatic switching solution designed for 6kW capacities. When combined with an IVET transformer, it seamlessly adjusts grid power to the onboard system, allowing a 230V/50Hz system to operate smoothly with American or Caribbean AC connections.
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€ 1.997,16
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1-2 weeks delivery time Price incl. 19% VAT The Mastervolt 85000450 IVET Isolation Transformer (4.5kW) ensures a secure connection between your vessel and shore installation. This vital component in your electrical system provides galvanic electrical isolation, preventing corrosion of metal parts and ensuring proper grounding.
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€ 2.161,50
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1-2 weeks delivery time Price incl. 19% VAT The Mastervolt 85000600 IVET Isolation Transformer 6kW provides a reliable and high-quality solution for safe electrical connections between your vessel and shore power. Designed for self-installation, this heavy-duty E-core transformer features multi-tap input and output capabilities, handling 120/230/240 V, and offers galvanic isolation to prevent electrical corrosion. With an efficiency of over 93% and optional Soft Start functionality, this transformer ensures smooth operation and prevents fuse blowouts. Ideal for demanding applications, the IVET Isolation Transformer is CE and ABYC certified, offering reliable performance in harsh environments while protecting sensitive onboard equipment. Perfect for recreational and semi-professional use, it guarantees safe, high-output power for all your electrical needs.
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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.