---
product_id: 327657140
title: "Autotransformer 120/240V AC"
brand: "victron energy"
price: "¥298838"
currency: JPY
in_stock: true
reviews_count: 5
category: "Victron Energy"
url: https://www.desertcart.jp/products/327657140-autotransformer-120-240v-ac
store_origin: JP
region: Japan
---

# 120/240V split phase output Step up, step down & phase balancing Temperature protection with manual reset Autotransformer 120/240V AC

**Brand:** victron energy
**Price:** ¥298838
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your space smarter, safer, and with style!

## Quick Answers

- **What is this?** Autotransformer 120/240V AC by victron energy
- **How much does it cost?** ¥298838 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/327657140-autotransformer-120-240v-ac)

## Best For

- victron energy enthusiasts

## Why This Product

- Trusted victron energy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built-in Thermal Safety:** Automatic disconnection on overheating ensures reliable, worry-free operation with manual reset control.
- • **Versatile Voltage Transformation:** Supports step up, step down, and split phase balancing to adapt to diverse power needs.
- • **Seamless 120/240V Split Phase Power:** Effortlessly convert single-phase 120V to balanced split-phase 240V for your home or workspace.
- • **Premium Build Quality by Victron Energy:** Engineered for durability and superior leg balancing, designed to outlast multiple inverter generations.
- • **Cost-Effective Alternative to Stacked Inverters:** Save money and space by replacing dual inverters with one robust autotransformer solution.

## Overview

The Victron Energy Autotransformer 120/240V AC is a high-quality, versatile transformer designed to convert single-phase 120V power into balanced split-phase 240V output. Featuring built-in thermal protection and compatibility with Victron Multiplus and Quattro inverter/chargers, it offers a cost-effective, durable alternative to stacking inverters, ideal for professional-grade power management in residential and commercial settings.

## Description

Victron Energy Autotransformer 120/240V AC : desertcart.ae: Automotive

Review: You can tell this is a quality product. I started with the 100 amp but returned for the 32 amp version for my application so I was able to test both. Both worked great and created clean power to split phase 230-240v from my 110v single phase 300 watt inverter. There is a hum at idle and under load, this is to be expected from a transformer. Since there is a power draw at idle, I wound-up adding a 120v breaker between the inverter and the transformer to minimize parasitic power draw. Buy this if you are trying to tie your single phase 110-120v inverter to your split phase 240v house system...just make sure you use the proper wire!
Review: These are great to pair up with cheap European 240v-only inverters to get a neutral and convert to US split phase. The 100a model can pass that much current through for 240v-only loads, and the transformer itself is superior at leg balancing compared to inverters with a built-in transformer. If you know what you're doing, this is a way more cost effective and resilient way of getting US split phase without having to pay a fortune for an all-in-one split phase inverter. Build quality is top notch, which is to be expected from Victron. I'm sure this transformer will outlive multiple inverters.

## Features

- Victron Energy Autotransformer can be used for step up, step down and split phase output balancing purposes
- While the step up and step down functions are fairly straightforward, split phase output balancing may require some more attention
- Temperature protected: In case of overheating, Victron Energy Autotransformer is disconnected from the supply. Reset is manual.
- An alternative to stacked inverters: The alternative to stacking two 120V inverters to provide a 120/240V split phase supply is a 240V inverter with an additional Autotransformer
- Ground relay for use with Victron Energy Multiplus or Victron Energy Quattro Inverter/Chargers included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07CV3XCM9 |
| Department | unisex-adult |
| Item model number | ITR000100101 |
| Item weight | 13474 Grams |
| Manufacturer | Victron Energy |
| Product Dimensions | 11 x 21.4 x 42.5 cm; 13.47 kg |

## Product Details

- **Brand:** Victron Energy
- **Current rating:** 100 Amps
- **Mounting type:** Foot Mount
- **Power source:** Corded Electric
- **Specification met:** CE

## Images

![Autotransformer 120/240V AC - Image 1](https://m.media-amazon.com/images/I/61bCWyfqAyL.jpg)

## Questions & Answers

**Q: I have a 3000w 12v multiplus 2 , can I use the autotransformer to produce 240v ?**
A: Yes, you can convert a 120VAC up to 120/240VAC split phase. Or to just 240VAC. 
This is the 100amp model though. You can save a couple bucks and use the 32amp model instead.

**Q: Can this be mounted Horizontally?**
A: It hangs on a bracket ... but if you built a bracket ... I guess it could be mounted horizontally.

**Q: Can the Victron Energy Autotransformer 120/240V AC and 100 amp have a 110v outlet input to energize an 240v induction cooktop of total 10800 Watts?**
A: I don’t fully understand the question. This device takes single phase 240v (L-N) and gives you split phase 240V (L-L). What is the required power you need for your induction cooktop?

**Q: Dimensions? Looking to get in-between a13”x13” wheel well.**
A: 425 x 214 x 110 mm

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***L on 22 November 2025*

You can tell this is a quality product. I started with the 100 amp but returned for the 32 amp version for my application so I was able to test both. Both worked great and created clean power to split phase 230-240v from my 110v single phase 300 watt inverter. There is a hum at idle and under load, this is to be expected from a transformer. Since there is a power draw at idle, I wound-up adding a 120v breaker between the inverter and the transformer to minimize parasitic power draw. Buy this if you are trying to tie your single phase 110-120v inverter to your split phase 240v house system...just make sure you use the proper wire!

### ⭐⭐⭐⭐⭐ Review
*by K***Z on 16 February 2025*

These are great to pair up with cheap European 240v-only inverters to get a neutral and convert to US split phase. The 100a model can pass that much current through for 240v-only loads, and the transformer itself is superior at leg balancing compared to inverters with a built-in transformer. If you know what you're doing, this is a way more cost effective and resilient way of getting US split phase without having to pay a fortune for an all-in-one split phase inverter. Build quality is top notch, which is to be expected from Victron. I'm sure this transformer will outlive multiple inverters.

### ⭐⭐⭐⭐⭐ Review
*by C***0 on 18 November 2025*

Great . Works as it should turns me 120v into 240v

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-07*