Autotransformer 120/240VAC-100A

The Victron Energy 120/240VAC-100A autotransformer offers a reliable solution for stepping up, stepping down, and phase balancing power systems. Its versatility makes it particularly useful in environments where different voltage standards may be encountered, such as on boats or in vehicles traveling between countries with different power standards.

Applications and flexibility

The autotransformer can operate in both 120V and 240V systems, making it ideal for adapting to different power grids. Its phase-balancing function is particularly important in two-phase systems, where voltage stabilization and even load distribution are crucial for the proper operation of electrical devices.

Space saving and high efficiency

Thanks to its compact size and low weight, this autotransformer can be easily installed in confined spaces, such as boats, campers, or mobile power systems. Its efficiency ensures stable operation and minimizes energy loss, resulting in long life and cost savings.

Safety and security

The device is equipped with an advanced safety system, including a grounding relay that allows for a neutral-to-power connection directly at the autotransformer when used with Victron Energy MultiPlus or Quattro devices. Additionally, input fuses provide overload protection and ensure safe operation in demanding conditions.

Technical specifications:

• Entry: 120/240V


• Input fuse: 32 A, bipolar


• Frequency: 50/60 Hz


• Maximum power supply (240V): 100 A


• Neutral current (30 min): 32 A (3800 VA)


• Neutral current, continuous: 28A @ 40°C / 100°F


• Transformer type: Toroidal


• Input fuse: Yes

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• Case: Aluminum


• Protection class: IP 21


• Libra: 13.5 kg


• Dimensions: 425 x 214 x 110 mm

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• Security: EN 60076

The Victron Energy 120/240VAC-100A autotransformer is an indispensable device in systems requiring voltage flexibility and phase stability, ensuring safety and long-term reliability.