Victron Autotransformer 120/240VAC- 32A

Victron Autotransformer 120/240VAC- 32AVictron 32A Autotransformer: Step Up, Step Down and Split Phase Balancing The Victron Autotransformer 120 240VAC 32A is an essential component for complex power systems requiring step up, step down, or split phase output balancing. Designed to seamlessly integrate with advanced energy setups, this transformer ensures optimal utilisation of your power supply, whether you are operating from the grid, a generator, or an inverter. Master Split Phase

Victron 32A Autotransformer: Step-Up, Step-Down and Split-Phase Balancing

The Victron Autotransformer 120/240VAC 32A is an essential component for complex power systems requiring step-up, step-down, or split-phase output balancing. Designed to seamlessly integrate with advanced energy setups, this transformer ensures optimal utilisation of your power supply, whether you are operating from the grid, a generator, or an inverter.

Master Split-Phase Output Balancing

While step-up and step-down functions are straightforward, managing a split-phase power supply requires careful load balancing. Consider a 30A 120/240V split-phase supply powering both 240V and 120V loads. Because 120V loads are rarely distributed evenly across both legs, a severe current imbalance can occur. For instance, a heavy 120V load on one leg could draw 20A, while the other leg draws only 5A. This imbalance significantly restricts the overall capacity of your system, as one leg may overload while the other remains underutilised.

The Victron 32A step up transformer and balancer solves this issue. By connecting the autotransformer to create a new neutral, any load unbalance is absorbed. In the scenario of a 30A supply, the load difference flows through the neutral and the transformer's windings, allowing the system to operate at its full theoretical capacity without bottlenecking a single 120V leg.

A Smarter Alternative to Stacked Inverters

When designing a 120/240V split-phase system, using a single 240V inverter paired with a Victron autotransformer is often more efficient than stacking two 120V inverters. If you stack two 3kVA 120V inverters, each leg is strictly limited to its individual capacity (e.g., 25A). If the load on one leg is low, that spare capacity cannot be transferred to the other leg.

By contrast, pairing a single 5kVA 240V inverter with this 32A autotransformer supplies balanced load to each 120V leg while allowing spare capacity to cross over. If one leg has minimal load, the other leg can draw significantly more power, up to a maximum unbalance of 32A. This configuration is highly recommended for systems where uneven loads are expected.

Integrated Ground Relay for Seamless Integration

Safety is critical in off-grid and mobile power systems. When operating in inverter mode, the neutral output must be connected to earth to ensure the proper functioning of earth leakage devices like a GFCI or RCD. For split-phase supplies, the neutral must be explicitly grounded. To accommodate this, the Victron autotransformer features a built-in grounding relay that is directly controlled by your 230/240V Multi or Quattro inverter/charger, ensuring compliance and safety without complex external wiring.

Robust Hardware and Thermal Protection

Housed in a durable, powder-coated metal chassis with integrated rear wall-mounting brackets, this unit is built for longevity. The base features a central cooling fan for active thermal management, alongside M25 cable glands for secure, weather-resistant electrical connections. To protect your system, the unit includes temperature protection that will automatically disconnect the supply in the event of overheating, requiring a manual reset via the front-access circuit breaker once safe temperatures are restored.

Key Features

• Flexible voltage control: Reliable step-up, step-down, and split-phase balancing.
• High capacity balancing: Absorbs up to 32A of load unbalance to maximise inverter or generator output.
• Integrated ground relay: Designed for seamless use with Victron Multi and Quattro inverter/chargers.
• Thermal protection: Auto-disconnect on overheating with a simple manual reset circuit breaker.
• Clear diagnostics: Front panel status LEDs for power, ground relay state, and temperature.
• Durable construction: Robust powder-coated enclosure with M25 cable entries and a dedicated earth stud.

Maximise Your Power System Efficiency

Upgrade your electrical architecture with robust load balancing and voltage management. Integrate the Victron Autotransformer 120/240VAC 32A into your setup today to ensure stable, efficient, and safe power distribution across all your critical loads.