Victron Energy Autotransformer – 32A and 100A Models

Flexible Voltage Conversion • Split-Phase Balancing • Marine, RV, and Off-Grid Ready

The Victron Energy Autotransformer is a compact, high-efficiency single-phase transformer designed to give you total flexibility when configuring AC power systems. Whether you need to step voltage up or down, create a 120/240V split-phase supply, or balance uneven loads across two legs, this transformer is engineered to deliver reliable performance in demanding marine, RV, and off-grid environments.

Built around a toroidal core for low noise and high efficiency, the unit supports a wide variety of AC configurations without requiring multiple inverters or complicated rewiring. Over-temperature protection and a built-in circuit breaker provide enhanced safety and ease of installation.

Key Features

• Step-Up / Step-Down Functionality
  Convert 120V → 240V or 240V → 120V depending on your system requirements.

• Split-Phase 120/240V Capability
  Generate a full split-phase output from a single-phase source — ideal for equipment that requires 240V while still supporting standard 120V loads.

• Load Balancing Across AC Legs
  In split-phase systems, the autotransformer helps correct imbalance between L1 and L2, maximizing usable inverter or generator capacity.

• Neutral-to-Ground Bonding Option
  Compatible with Victron inverter/chargers that require internal or system-level bonding.

• Thermal and Overload Protection
  Automatic temperature-sensing shutdown and manual-reset breaker protect the system under fault conditions.

• Compact, Durable Construction
  Aluminum enclosure with screw-terminal wiring simplifies installation while ensuring longevity.

Model Variants:

Autotransformer 32A (120/240V – 32A)

This variant is designed for smaller systems where loads remain within a 32-amp envelope. It provides all the functionality of the Victron autotransformer — voltage conversion, split-phase creation, and load balancing — in a smaller, lighter unit suited for modest AC demand.

Best for:

• Small air-conditioning loads

• Household appliances

• RV or marine AC distribution panels

• Small generators or a single 120V inverter

Autotransformer 100A (120/240V – 100A)

The 100A version is built to handle significantly higher feed-through current, making it ideal for large boats, whole-RV systems, generator installations, and off-grid home power setups. It ensures stable performance under heavier loads while providing the same flexible configuration options.

Best for:

• High-demand 240V appliances

• Multiple AC circuits with mixed voltage

• Larger inverter/charger systems

• Installations requiring future growth capacity

Technical Specifications (Both Models):

Typical Applications

• Creating a split-phase system from a single-phase inverter or generator

• Balancing AC leg loads to improve inverter/generator efficiency

• Voltage adaptation when shore power or generator output doesn’t match equipment requirements

• Marine and RV systems encountering varying AC sources

• Off-grid homes using mixed 120V and 240V appliances