Yinleader Voltage Converter 800W Step Up/Down Transformer 110V to 220V

This product did not work from the beginning. When I plugged it into the wall, it would not come on even though I selected the right voltage. I was very disappointed.

Defective and electrically dangerous! For the 120 volt outlet the Hot and Neutral sides are reversed. (Another reviewer reported the same thing so probably it is defective design rather than a drunk factory worker.) Also, for the 240 volt outlet one Hot side is 240 volts w.r.t. ground; it should be only 120 volts w.r.t. ground. The other “Hot” side is grounded rather than being 120 volts w.r.t. ground opposite from the first Hot side.

This is an awesome toroidal autotransformer that can produce 120/240V split phase from an isolated 240V input. Just set the switch to 220 and use the transformer’s center tap as the load neutral, which can be bonded to ground potential. You will need to determine which output socket prong is connected to the center tap. On my unit it was the ‘hot’ side of the 120V outlet, so that’s my neutral. It could have been either side. I’m not using that outlet as a 120V outlet in this application, just connecting that one lead as the neutral in my output and having L1-L2 connected to the input of this unit and connected to the 240V load in parallel. I do that because I’m drawing enough current with this load to pop the (5A?) input breaker on this unit if I use the 240V universal outlet for that instead of paralleling on the input. My application is to use a $150 12VDC to 230VAC inverter as a generator input to a hybrid solar battery system I had installed for my house. In this system the main inverter keeps the split phase load balanced, so all this unit needs to do is bias (center tap) the backup inverter output to the system neutral so it is a valid generator input. This autotransformer can do that since the 230 from the inverter is isolated and would normally just float if not center-tapped to a neutral. The main inverter protects the generator input from active power imbalance in the split phase but it doesn’t provide reactive (Q) support, so this unit must cover the reactive load imbalance from things like a microwave oven. I don’t try to run the washing machine, dryer or sewer pump while on generator, and certainly not the air conditioning, but the microwave, refrigerator and dishwasher are handled fine by this. With this inverter supplying the generator input we can use either our Prius Prime or our Rav4 Prime to provide backup power in an extended grid outage. The Prius especially is a nice backup generator because the engine is so quiet and efficient, and only turns on for about one minute out of 15, using the traction battery in between. Also if we started the outage with a full battery the engine doesn’t turn on at all for the first 8 hours. My unit arrived with a loose central mounting bolt allowing the transformer to flop around in the case, so I opened it up and tightened the bolt. Minus one star. While I had the case open I verified that the wiring connections matched schematically what I expected. I bought this low rated unit because I want to minimize the size, weight and losses in the transformer and this can handle the max 330 VA of unbalanced 120V reactive power when our house is on generator. If you want to have flexibility in your 120V loads, get the transformer that is rated for the highest 120V load you want to support. Update: This setup worked well in twelve hours of testing, but then the inverter blew its input ripple cap. I haven’t found a 12V to 240V inverter that can support this application, with the inductive loads.

This voltage converter works perfectly with my European appliances in the US. It is easy to use, reliable, and feels well-made. Very satisfied with my purchase!

I have not learned how to use it yet. I tried, and it blew all the fuses in my apartment. I need help to figure it out.

Purchased this so my girlfriend could use her dyson air wrap when she visits the US... Shocker, it doesn't work for more than 10 seconds at a time. We have to repetitively turn it off, reset the breaker, then turn it back on. Either purchase a greater step up over the the required 220 or just buy a better quality one.

Great voltage converter for international‑spec electronics. 500W capacity meets my daily needs. The unit is well‑built and portable. Reminds others please do not exceed its rated power limit. Overall satisfied with the purchase.

This is not an isolated converter, all the neutrals are tied together between the input and outputs. As such you'll want to make sure it has a good cable and is plugged into a properly wired outlet, otherwise you might wind up with the output floating at an unexpected voltage with respect to ground. I have to knock off a star because it came with a power cord where line and neutral are reversed, so plan to replace that. But, one thing I really like about this is that is uses a standard C-13/C-14 power inlet. So the cord is easy to replace, and it will be easy to source cords for any countries traveled to. The unit appears well built, the wiring is a bit thin but it's only rated for 300W continuous so that's not a surprise. I couldn't find a rating on the circuit breaker so I don't know what that will be like to live with. It's in a nice metal enclosure and the transformer appears to be good quality. It is a bit heavy but it's a power transformer so that's to be expected. It came with readable instructions. Overall a good value for the money.

Works perfectly!!!

Excelente

Fantastic machine, highly recommend it!

Muy bueno disipador calor

This one is so sturdy and solid. Doesnt make any noise compared to the older versions and does a pretty good job. Three sockets and is built with quality. One thing is that this wont be helpful for travel unless you are ok with carrying a heavy unit. But overall this is an awesome buy!!