Step down transformer/converter

ebike11

1 MW
Joined
Nov 16, 2013
Messages
2,004
Location
far away
Hi guys
I have a 220V charger that was sent to me by mistake from aliexpress. They sent the wrong voltage even after telling them to send 110v.
Anyway since we use 110V in north america, and since my charger is 20s (84v) 9A output...would I just need a 220v down to 110v and around 1000W transformer??
If I went larger, say 3000w in case of larger chargers that are more powerful that I may get in the future, would it make any difference?
Thanks!
 
RunForTheHills said:
Many chargers have an input range of 100-240V, so it may work on 110V and you just need a plug adapter.

the seller said this charger is 220V only
 
Why wouldnt one of these work?
https://www.amazon.com/travel-converter-220v-110v/s?k=travel+converter+220v+to+110v

I see 220 to 110v in 2000w for curling iron, hair dryer.
https://www.amazon.com/TryAce-Voltage-Converter-Worldwide-Adapter/dp/B01NBMQIX8/ref=sr_1_8?keywords=travel%2Bconverter%2B220v%2Bto%2B110v&qid=1656826148&sr=8-8&th=1

Whats your chargers input amp rating?
Whats the plug on there, from what country?


84v times 9a is only 756 watts
I do not know if this correlates at all using travel adapters.
Meanwells using 110v input, start jumping from 110v to 220v inputs at about 1200-1400w output charge rate.

Are you a traveling man?
https://community.ricksteves.com/travel-forum/tech-tips/110v-to-220v-converter-recommendations
Its "adapters". You need a different adapter for the UK than mainland europe.

This is the prong layout, I always thought there were more different plug prong layouts in the world.
https://www.electronicproducts.com/why-doesnt-the-us-use-220v-like-everyone-else-in-the-world/
Some good history in that link.
plug.jpg
 
ebike11 said:
Hi guys
I have a 220V charger that was sent to me by mistake from aliexpress. They sent the wrong voltage even after telling them to send 110v.
Anyway since we use 110V in north america, and since my charger is 20s (84v) 9A output...would I just need a 220v down to 110v and around 1000W transformer??
If I went larger, say 3000w in case of larger chargers that are more powerful that I may get in the future, would it make any difference?
Thanks!
These are pretty large and heavy, and not really cheap. Looks like $60-$100 and 10-20lbs. (the lighter it is, the lesser it's transformer, and the more likely to overheat under load).
https://www.google.com/search?q=1000w+step+up+transformer+converter+110v+to+220v

Probably better off buying a new charger from a different seller if they won't exchange it for you (and make sure to avoid the seller that you already got screwed by).


If you want 3000w instead of 1000w, prices and weights at least double, sometimes triple.
 
calab said:
Why wouldnt one of these work?
https://www.amazon.com/travel-converter-220v-110v/s?k=travel+converter+220v+to+110v
What I see in that search are generally just adapters for the plug types, and step-down converters, where what is needed is a step-up converter (from 110v from the wall, to the 220v the wrong charger he has will need). Some of them that are actual converters are pretty low wattage, vs what's needed here.

Regarding the transformer wattage needed, remember that even if the output of the charger is only about 750w, it's also probably only 50-80% efficient, so the input to the charger (output of the transformer) needs to be proportionally higher to compensate for the losses.
 
amberwolf said:
calab said:
Why wouldnt one of these work?
https://www.amazon.com/travel-converter-220v-110v/s?k=travel+converter+220v+to+110v
What I see in that search are generally just adapters for the plug types, and step-down converters, where what is needed is a step-up converter (from 110v from the wall, to the 220v the wrong charger he has will need). Some of them that are actual converters are pretty low wattage, vs what's needed here.

Regarding the transformer wattage needed, remember that even if the output of the charger is only about 750w, it's also probably only 50-80% efficient, so the input to the charger (output of the transformer) needs to be proportionally higher to compensate for the losses.

Ah i would need a step up not step down
 
110Vto220V.jpg
I use one of these to run a Chinese drill press that the seller 'claimed' would run on 110 Volts AC.
It would actually rotate the chuck on 110 Volts but only at about half speed and with no torque.
With the "UMI Step UP 110 Volts to 220 Volts Converter" it runs normally.

https://www.amazon.com/dp/product/B0725T41RW
 
amberwolf said:
calab said:
Why wouldnt one of these work?
https://www.amazon.com/travel-converter-220v-110v/s?k=travel+converter+220v+to+110v
What I see in that search are generally just adapters for the plug types, and step-down converters, where what is needed is a step-up converter (from 110v from the wall, to the 220v the wrong charger he has will need). Some of them that are actual converters are pretty low wattage, vs what's needed here.

Regarding the transformer wattage needed, remember that even if the output of the charger is only about 750w, it's also probably only 50-80% efficient, so the input to the charger (output of the transformer) needs to be proportionally higher to compensate for the losses.

Quick question..if I purchased a 5000w unit, would it damage electronic devices/products that for example only require 500~1500watts?
 
The 5000W design means that is the maximum output it is capable of. It will provide up to whatever the load is drawing, so if you plug it into a 1000W charger, the transformer output will only be 1000W.
 
I would just wire it to the 220 on your panel. We certainly have 220v going into our homes, we are not only 110v.

Less heat. Reap benefit. Better power. Faster charge.

You got 220v leg on your panel. You do. Just wire in a pair of breakers on the panel between hots and run a line to a box and put an outlet in it.

Whoolah 220v outlet. Cost like 20$ and then.. you can even run your clothes dryer off it if you want to. Lol.


This would provide future-proofing too. For when / if you ever want to get into larger chargers ( 3-5kW from the wall chargers).. you would already have the 220v on an outlet. If you cannot do it yourself a good electrician can do it. Install a outlet. 220v outlet.
 
ebike11 said:
the seller said this charger is 220V only

I would not treat what some Chinese email tech support person told you as authoritative. They are almost certainly young, inexperienced, don't know a volt from an amp, and don't get paid extra for being correct. :lol:

Just plug it in into 110v and see what happens. Worst case it doesn't charge your battery. You are not trying to see if a 110v appliance works on 220v. That's different.
 
If you end up just buying another charger, I bought one of these last night. Seemed like an OK deal compared to another 8A that I was looking at so I decided to take a chance:

https://www.ebay.com/itm/234168569503?hash=item368588ce9f:g:nSMAAOSweaJisr1H
 
Comrade said:
ebike11 said:
the seller said this charger is 220V only

I would not treat what some Chinese email tech support person told you as authoritative. They are almost certainly young, inexperienced, don't know a volt from an amp, and don't get paid extra for being correct. :lol:

Just plug it in into 110v and see what happens. Worst case it doesn't charge your battery. You are not trying to see if a 110v appliance works on 220v. That's different.

Good point
 
E-HP said:
If you end up just buying another charger, I bought one of these last night. Seemed like an OK deal compared to another 8A that I was looking at so I decided to take a chance:

https://www.ebay.com/itm/234168569503?hash=item368588ce9f:g:nSMAAOSweaJisr1H

Haha thats the one i have but its 220v 9A model
 
I see the mistake I made there in the step up step down area.
The link I threw up for the travel charger only, which converts 110v wall outlet to use 220v appliances and devices, hence STEP UP. I was tired.

We make mistakes when we are tired, when there is willingly added shit added to the mix then please be careful, maybe only use that setup for the work bench in the garage next to the ebike. You gotta do what you gotta do. We all do.
 
ebike11 said:
Hi guys
I have a 220V charger that was sent to me by mistake from aliexpress. They sent the wrong voltage even after telling them to send 110v.
Anyway since we use 110V in north america, and since my charger is 20s (84v) 9A output...would I just need a 220v down to 110v and around 1000W transformer??
If I went larger, say 3000w in case of larger chargers that are more powerful that I may get in the future, would it make any difference?
Thanks!

OP, maybe reach out to your credit card co to address the merchant's error?

Also, if you going the route of a step up converter, pls add a switch between them.
 
gobi said:
ebike11 said:
Hi guys
I have a 220V charger that was sent to me by mistake from aliexpress. They sent the wrong voltage even after telling them to send 110v.
Anyway since we use 110V in north america, and since my charger is 20s (84v) 9A output...would I just need a 220v down to 110v and around 1000W transformer??
If I went larger, say 3000w in case of larger chargers that are more powerful that I may get in the future, would it make any difference?
Thanks!

OP, maybe reach out to your credit card co to address the merchant's error?

Also, if you going the route of a step up converter, pls add a switch between them.

Thanks for the advice! What type of switch do you mean?
 
Any electrical switch will suffice, you won't be drawing more than 15 amps, you could use a compatible switched power extension

Aliexpress/Alibaba - sellers are known to pull fast ones on us buyers and then have a astounding sob stories when you ask them to make you whole.

Reach out to CC and they will probably side with you, just buy the correct one from a different vendor.
 
Back
Top