#103 in Battery chargers & accessories
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Reddit mentions of Rockstone Power 2000 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]
Sentiment score: 3
Reddit mentions: 5
We found 5 Reddit mentions of Rockstone Power 2000 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]. Here are the top ones.
![Rockstone Power 2000 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]](https://m.media-amazon.com/images/I/41GeKdZjAoL._SL300_.jpg)
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2000 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.Patented Simultaneous 3-Mode Output: 5V USB Port / 120V USA Output Socket / 220V Universal Output Socket. 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, and have became a proud supplier for Tesla Inc. since 2018. Shipping is available to all Overseas Military APO/FPO/DPO addresses.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; 2,000 Watt transformer can be only be used with an appliance that uses up to 1,300 Watts that is to prevent damage from the transformer itself and the appliance being used.Package Contents: Rockstone Power 2000 Watt Heavy Duty Voltage Transformer Converter, Hardwired Heavy Duty Insulated Power Cord with USA Grounded 3-Prong Plug, American to European Grounded Schuko Wall Outlet Plug Adapter, 2 PCS Spare Fuses, and Instruction Manual.
Specs:
| Height | 5.75 Inches |
| Length | 10 Inches |
| Size | 2000 Watt |
| Weight | 20 Pounds |
| Width | 7 Inches |
https://www.amazon.com/Rockstone-Power-Voltage-Transformer-Converter/dp/B00CLYFNU0/
This thing. There's a few different brands but as near as I can tell they're exactly the same. Heavy thing too. I don't know what it would be on Korean Amazon but you're looking for a 'step down voltage converter' in English. There's smaller profile ones too but given the resistors involved in making the magic happen, I'm not sure how reliable they are.
You would need an AC power converter that can handle at least 1500W to be on the safe side. Something like this.
All you need is a transformer to step down voltage.
Something like this
http://www.amazon.com/Bright-VC500W-Voltage-Transformer-converter/dp/B000MX1QXA
or this http://www.amazon.com/Rockstone-Power-Voltage-Transformer-Converter/dp/B00CLYFNU0/ref=sr_1_5?ie=UTF8&qid=1416943374&sr=8-5&keywords=240v+to+120v
Only for devices that are rated for 120V-only and that you can't do without. Make sure it's an actual step-down transformer like this one, not one of those suspiciously small cheapo 'converters' like this one. The cheapo ones don't work for most devices.
Given that step-down transformers are pretty large, heavy and expensive, it only makes sense to use one for more expensive devices. For something like a clothes iron, you're probably better off buying one locally.
A voltage converter should work, maybe your volt converter is just cheap or bad or doesn't support the required wattage of your coffee machine? A lot of the converters I'm seeing on market supports up to 200W.
You can search for a volt converter online that has high ratings and supports high wattage. There are cheap ones ($25-40 or so) where reviews aren't so great and then there are a bit more pricey ($70-100) ones that have solid reviews. I found this https://www.amazon.com/Rockstone-Power-Voltage-Transformer-Converter/dp/B00CLYFNU0/ref=sr_1_1?ie=UTF8&qid=1473095912&sr=8-1-spons&keywords=volt+converter&psc=1
Anyways, I think asking a group of engineers or more specifically electrical engineers would be better lol. They should be able to give you more relevant answers with confidence.