---
product_id: 1444424
title: "ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty]"
brand: "rockstone power"
price: "€ 447.75"
currency: EUR
in_stock: true
reviews_count: 13
category: "Rockstone Power"
url: https://www.desertcart.gr/products/1444424-rockstone-power-3000-watt-voltage-converter-transformer-heavy-duty-step
store_origin: GR
region: Greece
---

# 3000W heavy-duty power Step up/down 110-240V Full circuit breaker protection ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty]

**Brand:** rockstone power
**Price:** € 447.75
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your global lifestyle with confidence — never miss a beat!

## Quick Answers

- **What is this?** ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] by rockstone power
- **How much does it cost?** € 447.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/1444424-rockstone-power-3000-watt-voltage-converter-transformer-heavy-duty-step)

## Best For

- rockstone power enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Built-in full range fuse and overcurrent protection ensures your devices stay safe.
- • **Smart Multi-Output:** Patented 3-mode output with 5V USB, 120V USA socket, and 220V universal socket for versatile connectivity.
- • **Trusted Durability:** Rugged metal casing with CE certification and a 3-year warranty for peace of mind.
- • **Powerhouse Performance:** Handles up to 3000 watts for heavy-duty appliances and industrial use.
- • **Global Voltage Flexibility:** Seamlessly steps voltage up or down between 110-120V and 220-240V for worldwide compatibility.

## Overview

The ROCKSTONE POWER 3000 Watt Voltage Converter is a heavy-duty step up/down transformer designed for professional and industrial use. It converts voltages between 110-120V and 220-240V, supports up to 3000 watts, and features patented multi-output sockets including a USB port. With full circuit breaker protection, a durable metal casing, CE certification, and a 3-year warranty, it ensures safe, reliable power conversion for international appliances and equipment.

## Description

ROCKSTONE POWER? takes pride in being an industry leader in Quality, Technology and Innovation, our factory is the global leader and one of the largest manufacturers in the industry. Product Features 3000 Watts Heavy Duty Step Up/Down Voltage Transformer Converter. Step Up Voltage from 110-120 Volts to 220-240 Volts. Or Step Down Voltage from 220-240 Volts to 110-120 Volts. Patented Simultaneous 3-Mode Output: 5V USB Port / 120V USA Output Socket / 220V Universal Output Socket. Metal Casing. ON/OFF Switch with LED indicator light. Hardwired heavy-duty insulated power cord with USA Grounded 3-Prong Plug. CE Certified. Full Range Fuse Protection. Full Range Over Current Protection. Purchase Guide ROCKSTONE POWER? Heavy Duty Step Up/Down Transformers aka Voltage Converters, Voltage Transformers, Power Converters, Step Up Converters, Step Down Converters, Dual Voltage Transformers, are meant for worldwide use for all electronics, heavy duty machines, or household & industrial applications. For safety reasons, it?s recommended to use a Voltage Converter / Transformer that's max watts is at least 50% higher than your appliance. For example, if your appliance is rated at 1000 watts, you need to buy a Transformer with a max power of at least 1500 watts or greater. Some appliances, such as heating appliances, power tools, motors, laser printers and TVs, require 2-4 times more watts at start up than the printed rated wattage. What's in the Box - ROCKSTONE POWER? 3000 Watt Heavy Duty Step Up/Down Voltage Transformer Converter - American to European Grounded Schuko Wall Outlet Plug Adapter - 2 PCS Spare Fuses - Instruction Manual Warranty Manufacturer 3-year limited warranty. Please contact us via email if you have any questions.

Review: Functions well under constant load - Ordered this 500 Watt transformer to use an appliance from Korea in the U.S.A. Per the manufacturer, I computed the amount of wattage needed for the appliance and then doubled it. So for example, I computed that my appliance required 210 watts, so I doubled to 420 and rounded up. The appliance I have (from Korea) didn't specify the wattage using "Watt" or "W", but instead said "VA". I believe this is the same or equivalent, but you should check with a qualified electrician if this is the case with your appliance. If your unit shows just Amp or Voltage, you can multiply the two to arrive at Wattage. Again, check with someone who is qualified before using the appliance or ordering a unit so you can ensure you get the correct wattage. My calculations worked well and the appliance has functioned without problems under constant load the entire time without issues at the selected wattage. My understanding is that you'll want to double the wattage due to changes in the flow of electricity and the appliance's peak demands that could exceed the normal wattage used or identified on the back of the appliance. Be careful for laser printers or microwaves (and other high wattage appliances), I believe that can have peak watt use of much greater than their rated wattage. I believe the rule of thumb is to multiply by 3 instead of 2 to arrive at the wattage of transformer you will need. If you live in a country that has inconsistent power delivery, you may consider purchasing a separate unit that regulates the voltage. Some transformers have this built in, but this one does not. If you will be using this transformer in the U.S.A. on a modern electrical circuit, you probably do not need a regulator. I did not purchase one and have had no trouble in the month of so that I've used the unit. The transformer does get warm to the touch, but does not get hot. I expect to unplug and turn off this transformer during vacations and while away from the home for a long period of time, but I believe that this should function well under constant load indefinitely. When you plug in, make sure you select the correct voltage on the back as the removable plug should represent the SOURCE voltage of the electricity that you will be plugging the transformer INTO. In my case, I was using a 220V appliance in the U.S.A. (110V) so I selected 110V on the back and plugged the appliance into the 220V plug on the front. For some reason, I found this a bit confusing so make sure you read the instructions included with the unit. This transformer comes with a quality plug converted for U.S. style plugs (110V) to the European/Asian style (220V) which is useful if you travel internationally and have a dual 110/220V appliance (like cell phones, laptops, etc.). It may come in helpful if you need to convert plugs for the appliance you'll be using with the transformer. In general, the unit feels like it's well made and will be able to withstand a long period of consistent use. The transformer I received was cosmetically damaged during shipment (one corner bent and a few scratches). However I'm hiding this transformer behind some kitchen items so it's not a beauty contest. The unit held up well to shipment and I didn't think the scratches and bent corner warranted a return. As far as the value of the unit is concerned, I'm very pleased with the purchase. This unit appears to be quality and will last quite a while. It was less expensive than similar units and was available for delivery with desertcart Prime. The unit includes a 3-year warranty. With this transformer being used under a constant load 24/7 almost every day, I'm comfortable that all the quality issues with the unit should come out in the first 3 years. Overall: good value, quality unit, and fast free delivery with desertcart Prime. Recommended!
Review: Good product, but ONLY transforms the voltage, NOT frequency (50/60Hz) - This is a really good product that worked well to transform my camera lighting equipment (from the USA) to the appropriate voltage when I was in the netherlands. The netherlands calls for 230V, so I set the pin on the back of the unit to 240V. Now, a SUPER important thing to note about this unit is that IT ONLY TRANSFORMS THE VOLTAGE. You must read the device you plan on plugging into the converter to make sure that it will transform to either 50 or 60 Hz. If the device says that it only works with 110V/60Hz (as is how it is in the USA), then you MUST buy an appropriate power strip that will also convert the Hz to the appropriate one for the country you visit, as well as handle the wattage that your appliance uses. Most appliances now-a-days (at least most that I've encountered) will have either a built in transformer and/or inverter that will convert to 110-240v + 50/60hz. You do not need this device if all of the devices you use have this written on the product (you can usually read/find this information close to or near where you plug in your device). If your device ONLY states that it takes 110V/60hz (or whatever country you purchased your device in and their power specifications), again you will need to purchase a power strip that will also convert the Hz to the appropriate Hz that you will be visiting. I learned this information the hard way when I had purchased this device and had plugged in a cheap north american power strip that only handled 110v/60hz, and blew a fuse and destroyed the power strip.

## Features

- Package Contents: Rockstone Power® 3000 Watt Heavy Duty Voltage Transformer Converter, American to European Grounded Schuko Wall Outlet Plug Adapter, 2 PCS Spare Fuses, and Instruction Manual.
- 3000 Watts Heavy Duty Step Up/Down Voltage Transformer Converter. Step Up Voltage from 110-120 Volts to 220-240 Volts. Step Down Voltage from 220-240 Volts to 110-120 Volts.
- CE Certified. 3-Year Manufacturer's Limited Warranty. Metal Casing. Full Range Fuse Protection. Full Range Over Current Protection.
- RockStone Power® proudly supports the United States Military since 2001. Shipping is available to all Overseas Military APO/FPO/DPO addresses.
- 3-Year Manufacturer's Limited Warranty. CE Certified. Full Range Fuse Protection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00CLYMMCC |
| Best Sellers Rank | #106,058 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #436 in Power Converters |
| Brand | ROCKSTONE POWER |
| Brand Name | ROCKSTONE POWER |
| Customer Reviews | 4.2 out of 5 stars 3,410 Reviews |
| Global Trade Identification Number | 00617529014618 |
| Included Components | Power Converter;American to European Grounded Schuko Wall Outlet Plug Adapter;2 PCS Spare Fuses;Instruction Manual |
| Item Weight | 26 pounds |
| Manufacturer | E Depot Express |
| Minimum Frequency | 50 hertz |
| Model | 3000 Watt |
| Mounting Type | Surface Mount |
| Number of Items | 1 |
| Part Number | 3000 Watt |
| Power Source | Corded Electric |
| Specification Met | CE |
| UPC | 617529014618 |
| Unit Count | 1 Count |
| Warranty Description | 3 year manufacturer |

## Product Details

- **Brand:** ROCKSTONE POWER
- **Item Weight:** 26 Pounds
- **Mounting Type:** Surface Mount
- **Power Source:** Corded Electric
- **Specification Met:** CE

## Images

![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 1](https://m.media-amazon.com/images/I/71naoKv9TdL.jpg)
![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 2](https://m.media-amazon.com/images/I/71OEniQJ6cL.jpg)
![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 3](https://m.media-amazon.com/images/I/71fgs0+ZzIL.jpg)
![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 4](https://m.media-amazon.com/images/I/614V6x5NRQL.jpg)
![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 5](https://m.media-amazon.com/images/I/710FsqUP-+L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Functions well under constant load
*by C***S on November 29, 2014*

Ordered this 500 Watt transformer to use an appliance from Korea in the U.S.A. Per the manufacturer, I computed the amount of wattage needed for the appliance and then doubled it. So for example, I computed that my appliance required 210 watts, so I doubled to 420 and rounded up. The appliance I have (from Korea) didn't specify the wattage using "Watt" or "W", but instead said "VA". I believe this is the same or equivalent, but you should check with a qualified electrician if this is the case with your appliance. If your unit shows just Amp or Voltage, you can multiply the two to arrive at Wattage. Again, check with someone who is qualified before using the appliance or ordering a unit so you can ensure you get the correct wattage. My calculations worked well and the appliance has functioned without problems under constant load the entire time without issues at the selected wattage. My understanding is that you'll want to double the wattage due to changes in the flow of electricity and the appliance's peak demands that could exceed the normal wattage used or identified on the back of the appliance. Be careful for laser printers or microwaves (and other high wattage appliances), I believe that can have peak watt use of much greater than their rated wattage. I believe the rule of thumb is to multiply by 3 instead of 2 to arrive at the wattage of transformer you will need. If you live in a country that has inconsistent power delivery, you may consider purchasing a separate unit that regulates the voltage. Some transformers have this built in, but this one does not. If you will be using this transformer in the U.S.A. on a modern electrical circuit, you probably do not need a regulator. I did not purchase one and have had no trouble in the month of so that I've used the unit. The transformer does get warm to the touch, but does not get hot. I expect to unplug and turn off this transformer during vacations and while away from the home for a long period of time, but I believe that this should function well under constant load indefinitely. When you plug in, make sure you select the correct voltage on the back as the removable plug should represent the SOURCE voltage of the electricity that you will be plugging the transformer INTO. In my case, I was using a 220V appliance in the U.S.A. (110V) so I selected 110V on the back and plugged the appliance into the 220V plug on the front. For some reason, I found this a bit confusing so make sure you read the instructions included with the unit. This transformer comes with a quality plug converted for U.S. style plugs (110V) to the European/Asian style (220V) which is useful if you travel internationally and have a dual 110/220V appliance (like cell phones, laptops, etc.). It may come in helpful if you need to convert plugs for the appliance you'll be using with the transformer. In general, the unit feels like it's well made and will be able to withstand a long period of consistent use. The transformer I received was cosmetically damaged during shipment (one corner bent and a few scratches). However I'm hiding this transformer behind some kitchen items so it's not a beauty contest. The unit held up well to shipment and I didn't think the scratches and bent corner warranted a return. As far as the value of the unit is concerned, I'm very pleased with the purchase. This unit appears to be quality and will last quite a while. It was less expensive than similar units and was available for delivery with Amazon Prime. The unit includes a 3-year warranty. With this transformer being used under a constant load 24/7 almost every day, I'm comfortable that all the quality issues with the unit should come out in the first 3 years. Overall: good value, quality unit, and fast free delivery with Amazon Prime. Recommended!

### ⭐⭐⭐⭐⭐ Good product, but ONLY transforms the voltage, NOT frequency (50/60Hz)
*by G***G on May 11, 2017*

This is a really good product that worked well to transform my camera lighting equipment (from the USA) to the appropriate voltage when I was in the netherlands. The netherlands calls for 230V, so I set the pin on the back of the unit to 240V. Now, a SUPER important thing to note about this unit is that IT ONLY TRANSFORMS THE VOLTAGE. You must read the device you plan on plugging into the converter to make sure that it will transform to either 50 or 60 Hz. If the device says that it only works with 110V/60Hz (as is how it is in the USA), then you MUST buy an appropriate power strip that will also convert the Hz to the appropriate one for the country you visit, as well as handle the wattage that your appliance uses. Most appliances now-a-days (at least most that I've encountered) will have either a built in transformer and/or inverter that will convert to 110-240v + 50/60hz. You do not need this device if all of the devices you use have this written on the product (you can usually read/find this information close to or near where you plug in your device). If your device ONLY states that it takes 110V/60hz (or whatever country you purchased your device in and their power specifications), again you will need to purchase a power strip that will also convert the Hz to the appropriate Hz that you will be visiting. I learned this information the hard way when I had purchased this device and had plugged in a cheap north american power strip that only handled 110v/60hz, and blew a fuse and destroyed the power strip.

### ⭐⭐⭐⭐⭐ Excellent converter — works perfectly with our European coffee machine!
*by A***L on November 19, 2025*

This converter has been a lifesaver for us. We brought our coffee machine from Europe to the U.S. a few years ago, and thanks to this transformer, we’ve been able to use it every day without any issues. The quality has been great so far, and it hasn’t let us down at all. We’re still enjoying our machine just like back home. Highly recommend!

## Frequently Bought Together

- ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty]
- 8 Pack Universal Adapter, UK to US Adapter, Europe to US Plug Adapter, Travel Adapters, European to USA General Adapter, American Outlet Plug Adapter (White)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-08-02*