Victron Isolation Transformer 4500W Auto 115/230V
Victron Isolation Transformer 4500W Auto 115/230V
Auto-Sensing 115/230V, Soft Start, Toroidal, 21.7kg
Highlights:Recessed Handle: Integrated side handles for safe lifting and positioning of the unit,Power Rating: High-capacity 3600W continuous rating for heavy marine and industrial loads,Voltage Indicators: Dual voltage markings for 115V or 230V system configuration,Cable Glands: Bottom-entry compression glands for secure, strain-relieved wiring connections.
Highlights:Automatic Voltage Detection: Automatically switches between 115V and 230V AC input for universal compatibility,Aluminium Enclosure: IP21-rated corrosion-resistant aluminium housing finished in RAL 5012 blue,Secure Cable Glands: Heavy-duty bottom-entry glands for secure and weather-protected wiring.

DESCRIPTION
Victron 4500W Auto Isolation Transformer: Automatic Voltage Switching and Shore Power Protection
Automatic 115/230V Switching with Soft Start and Toroidal Core
The Victron Energy 4500W Auto Isolation Transformer provides complete electrical separation between shore power and a vessel's onboard AC system. By eliminating electrical continuity between the shore-side supply and the vessel, it helps prevent galvanic corrosion while supporting the correct operation of safety equipment such as GFCIs and circuit breakers.
This automatic model detects the incoming shore power voltage and switches between the 115V and 230V input ranges without requiring manual input reconfiguration. This makes it particularly suitable for vessels travelling internationally or connecting to marinas with different shore power standards.
Automatic 115V and 230V Input Detection
The transformer automatically selects the appropriate input range based on the incoming shore power voltage:
- 88V to 130V input: automatically selects the 115V input range
- 185V to 250V input: automatically selects the 230V input range
This automatic switching removes the need to manually reconfigure the transformer when connecting to a different shore power voltage. The AC output can be configured for either 120V or 240V to suit the vessel's onboard electrical system.
Why Galvanic Isolation Matters
Connecting a vessel directly to shore power can create an electrical path between the shore earth and underwater metal components such as propellers, shafts and through-hull fittings. This can accelerate galvanic corrosion, rapidly deplete sacrificial anodes and cause premature damage to valuable underwater equipment.
The Victron Isolation Transformer prevents this by transferring power magnetically between separate primary and secondary windings. Shore power is connected to the primary side, while the vessel's electrical system is supplied from the secondary side, electrically isolating the vessel from the shore earth.
This protection is important for fibreglass vessels as well as aluminium and steel hulls, as galvanic corrosion can occur whenever electrically connected metal components are exposed to water.
Flexible Voltage Conversion
In addition to electrical isolation, the transformer can support different input and output voltage combinations:
- 115V to 120V for isolation within a nominal 115V system
- 230V to 240V for isolation within a nominal 230V system
- 115V to 240V for powering a 240V onboard system from a 115V shore supply
- 230V to 120V for powering a 120V onboard system from a 230V shore supply
The transformer supports both 50Hz and 60Hz AC systems. It does not convert frequency, so the output frequency remains the same as the incoming shore power frequency.
5% Voltage Boost
The transformer's 1:1.05 winding ratio increases the output voltage by approximately 5%. This helps compensate for voltage drops commonly experienced across long shore power cables and marina electrical infrastructure. A nominal 115V input provides approximately 120V output, while a nominal 230V input provides approximately 240V output.
Key Features
- 4500W power rating for demanding onboard AC systems
- Automatic 115/230V input detection for use with different shore power supplies
- 120V or 240V output options for isolation or voltage conversion
- Galvanic isolation between shore power and the vessel's electrical system
- Soft-start technology to reduce inrush current and help prevent upstream circuit breakers from tripping
- 1:1.05 transformer ratio to compensate for common shore power voltage drops
- Toroidal transformer design for reduced weight and low operating noise
- Aluminium enclosure finished in Victron blue RAL 5012
- IP21 protection rating
- EN 60076 safety compliance
Soft Start for Reliable Shore Power Connection
High-power transformers can draw significant inrush current when first connected to shore power. The integrated soft-start system limits this initial current, helping prevent the upstream shore-side circuit breaker from tripping when the transformer is switched on.
The soft-start function operates automatically and does not require additional external components.
Correct Operation of Onboard Safety Devices
The isolation transformer allows the vessel to establish a separate onboard neutral-to-earth connection. When correctly installed with the required GFCI and protective devices, this ensures that the onboard safety system can respond properly to current leakage or a short circuit involving a metal component.
When the vessel is out of the water for maintenance or winter storage, it is recommended that the shore earth is connected to the vessel earth. Installation and grounding arrangements must follow the Victron installation instructions and applicable local electrical regulations.
Durable Marine Installation
The transformer is housed in a durable aluminium enclosure with an IP21 protection rating. Its toroidal design helps reduce weight, audible noise and stray magnetic fields, making it suitable for installation within marine electrical systems.
The automatic model measures approximately 362mm high x 258mm wide x 243mm deep and weighs approximately 21.8kg. It should be installed in a dry, well-ventilated location with sufficient clearance for cooling.
Professional Installation Required
The Victron 4500W Auto Isolation Transformer is a Safety Class I electrical product and must be installed by a suitably qualified person. The output voltage configuration, cable sizes, protective earthing, GFCI protection and circuit breakers must comply with the installation manual and applicable local electrical regulations.
International Shore Power Made Easier
Suitable for cruising yachts, motorboats and commercial vessels, the Victron 4500W Auto Isolation Transformer combines galvanic isolation, automatic shore voltage detection and voltage conversion in one robust unit. It is an ideal solution for vessels that regularly connect to both 115V and 230V shore power systems.
Order the Victron 4500W Auto 115/230V Isolation Transformer today for dependable shore power protection across different marina electrical systems.
SKU: VIC-ITR050452042
SPECIFICATIONS
Specifications
| Power Rating | 3600 W |
|---|---|
| AC Input Voltage | 115 or 230 V, automatic detection |
| AC Output Voltage | 120 or 240 V |
| Frequency | 50/60 Hz |
| Output Current Rating | 32 A (115 V); 16 A (230 V) |
| Can Be Used As | 115 V to 120 V isolation transformer; 230 V to 240 V isolation transformer; 115 V to 240 V isolation transformer; 230 V to 120 V isolation transformer |
| Soft Start | Yes |
| Operating Temperature Range | -20 °C to 40 °C |
| Humidity | Max 95%, non-condensing |
| Transformer Type | Toroidal (low noise, low weight), 1:1.05 ratio |
| Enclosure | Aluminium (blue RAL 5012) |
| Protection Category | IP21 |
| Safety | EN 60076 |
| Weight | 21.7 kg |
| Dimensions (H x W x D) | 362 x 258 x 221 mm |
| SKU: | VIC-ITR050452042 |
| Barcode: | 8719076022565 |
| Model #: | ITR050452042 |
| MPN: | ITR050452042 |
| HS code: | 85043200 |
| Country of origin: | IN |
| Package weight: | 25.0 kg |
| Package length: | 0.44 m |
| Package width: | 0.3 m |
| Package height: | 0.34 m |
WARRANTY
Victron Energy Limited Warranty Policy
Direct Customers
Victron Energy provides the following warranty to any direct customer (OEM, distributor or dealer) in relation to any products that Victron Energy has directly sold to the direct customer. This warranty is not an end-user warranty between Victron Energy and an end-user, and end-users shall not have any rights or remedies under this limited warranty towards Victron Energy directly. The direct customer shall, in turn, ensure that the end-user is provided with a warranty identical to this warranty, subject to applicable local mandatory law.
End-Users
Victron Energy may also provide a warranty directly to end-users, in which case the below warranty conditions equally apply to such warranty. In that case, end-users shall claim their warranty at their place of purchase or through the original direct customer of Victron, which can be found through the support section on Victron’s website. Hence, the direct customer shall on behalf of Victron Energy deal with any warranty claims made under any warranty that Victron Energy may provide directly to end-users. This support section on Victron’s website will provide further guidance on the procedure for end-users to make a claim under this limited warranty.
If the end-user is a consumer – a natural person who is acting for purposes which are outside that person's trade, business, craft or profession – the following applies. The rights and remedies granted to the consumer under this limited warranty are without prejudice to the consumer’s statutory rights. Furthermore, the consumer is entitled by law to remedies from the seller free of charge in the event of a lack of conformity of the goods (such as repair, replacement, price reduction or rescission), which remedies are not affected by this limited warranty.
Warranty
Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the original end-user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead-acid batteries: 2 years from date of purchase by the original end-user, with a maximum of 30 months from the Victron Energy invoice date, Lithium batteries: 3 years from date of purchase by the original end-user, with a maximum of 42 months from the Victron Energy invoice date. In addition to this, proof of correct battery usage is required when making a battery warranty claim.
For a 10% surcharge on the current net price for products that came with a 5-year warranty, an additional 5 years of warranty can be purchased by Victron’s direct customers, bringing the total warranty to 10 years. Warranty extensions need to be applied for ultimately one year before the expiration of the original term. Victron may ask proof that the product was still functional at the time of purchase of the extended warranty.
During the warranty period, Victron Energy will, at its discretion, repair, replace or (partly) credit the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation, and re‐installation.
This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:
- Reversed battery polarity.
- Inadequate connection.
- Mechanical shock or deformation.
- Contact with liquid or oxidation by condensation.
- Use in an inappropriate environment (dust, corrosive vapour, humidity, high temperature, biological infestation, etc.).
- Breakage or damage due to lightning.
- Connection terminals and screws destroyed or other damages, like overheating, due to insufficient tightening.
- For any electronic breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state of the internal control diode and/or the input/output X and Y capacitors determine the warranty.
This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone other than Victron Energy or one of its authorized Repair Centres. In order to qualify for the warranty, the product must not be disassembled or modified.
This warranty and our warranty obligations thereunder (repair, replacement or credit) are the direct customer’s and, if applicable, the end-user’s sole rights and remedies and our sole obligations with respect to any defective and/or non-conforming product or breach of warranty and is subject to and without prejudice to the limitations of liability in this warranty.
Victron Energy shall not be liable for damages, whether direct, incidental, special, or consequential, even caused by negligence or fault.
As a product requires service, it must be brought back to the place of purchase. In case no contact can be made with the merchant, or if he is either unable or not allowed to provide service, direct contact should be made with Victron Energy through the support section on Victron’s website.
In case Victron Energy replaces a product, it will own the replaced product. Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers when performing warranty repairs or building replacement products.
If Victron Energy repairs or replaces a part of a product, its warranty term is not extended: the warranty will apply for the remaining term of the original warranty term. For example, if Victron Energy replaces a product with a 5-year warranty after 3 years, the warranty of this product will apply for another 2 years, with a minimum of 6 months.
All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent or special damages, even if having been advised of the probability of such damages.
The foregoing limited warranty provided by Victron Energy is in lieu of any other warranties, express or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, of any kind whatsoever including, without limitation, warranties of merchantability or fitness for a particular purpose, with respect to any product. The above is without prejudice to the arrangement for consumers detailed above.
Life Support Policy
As a general policy, Victron Energy does not recommend the use of any of its products in life support applications where failure or malfunction of Victron Energy's product can be reasonably expected to cause the failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the liability of Victron Energy is adequately protected under the circumstances.
Warranty on repairs for products outside their warranty period
The warranty period on products that are outside their warranty period and have been repaired by Victron Energy or one of the Victron Energy Repair centres is six (6) months from delivery. The same applies to spare parts and circuit boards that have been supplied or repaired by Victron Energy.
Transport
It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.
Severability
If a part of the terms and conditions of this warranty is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions of this warranty.
Applicable law
This warranty is exclusively governed by the laws of the Netherlands, to the exclusion of the UN Convention on Contracts for the International Sale of Goods.


