samgab
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200V AC Japanese EVSE on 230V AC NZ Power system: Any probs?

Tue Jul 01, 2014 3:41 pm

Hi. In NZ here, I am seeing a lot of Nissan Leafs being imported lately. I'm thinking of getting one. The standard Japanese market EVSE that comes packaged with them is rated "200V AC input", "200V AC output".
What most second hand import dealers here do, is get an electrician to swap the plug to a standard NZ/AU 15A plug, and use it. No internal mods at all.
I have seen inside a Japanese spec EVSE, and I can see that the internal transformer is marked "200 V AC in, 19 V AC out".
And I can't read the markings on it, but I presume the MOV is also 200V rated.

Now, I understand that in Japan, the "200V AC" would be within certain tolerances, so it may be above or below 200V by a certain percentage of fluctuation, although probably not as high as 230V.
Same with the NZ supply, it can fluctuate up and down within about a -6%/+10% range.
So there may be some overlap there between the 2 system's allowable voltage ranges.
And there are probably safety margins engineered into the EVSE, being a high quality Panasonic unit.]

All this being said, I am concerned about the long term use of a 200V AC EVSE on a 230V AC power supply.
I wonder if the EVSE would be running hotter than designed, eg the MOV might be up in the range where it starts clamping.

Any electrical engineers wanting to weigh in on this?
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mctom987
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any pr

Tue Jul 01, 2014 6:03 pm

Not the expert you're looking for, but Japan mostly runs on 110V like the US.

Also, if you're at all concerned, EVSE Upgrade will replace the internals to make it 100-240V tolerant.
2014 Green Leaf SL +PP
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samgab
Posts: 3
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any pr

Tue Jul 01, 2014 7:36 pm

mctom987 wrote:Not the expert you're looking for, but Japan mostly runs on 110V like the US.

Also, if you're at all concerned, EVSE Upgrade will replace the internals to make it 100-240V tolerant.


Thanks mctom... Actually, strangely enough, Japan uses 100V AC; different from USA and almost everywhere else in the world. Another strange anomaly with Japan is that half the country is on 50Hz and the other half is on 60Hz. -- http://en.wikipedia.org/wiki/Electricit ... r_in_Japan
-- http://www.japan-guide.com/e/e2225.html
Heavy duty devices though, such as dryers, (and Leaf EVSE's) in Japan run on 200V, as you can see in the picture of the printing marked on the outside of the Japanese EVSE.

I know of evseupgrade.com, and have contacted them. I'll probably end up buying a new Lvl2 EVSE from them as a backup in case the original one dies.
A lot of Japanese import Leaf buyers in NZ seem to be using the 200V EVSE unmodified on our 230V supply without issue, so I guess I'll do that. I'm hoping that the built in tolerances will have accounted for power fluctuations over and above the 230V which we run at.

maini
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any pr

Sat Jul 05, 2014 3:18 pm

Most electronic parts including transformers can easily handle 10-20% fluctuations on the rated voltage and work fine. You should be OK.. if others have done it and it has been working fine you should be OK too.
2014 SV Cayenne Red with LED and QC port

groversum
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any probs?

Sat Mar 10, 2018 3:48 am

Can you suggest if after the modification you were able to use this charger or not... I have a similar situation and just asking if thats possible

like2bike
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any probs?

Sat Mar 10, 2018 8:38 am

My guess is that it will be OK (I'm an EE). I see there's a fuse in there which should eliminate the fire hazard. If the the MOV is before the fuse you could carefully (one hand behind back) see if it's cooking, otherwise the fuse will tell you the story. The fact that the car dealers keep doing it is a good sign it's not a problem.
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GlennD
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any probs?

Sat Mar 10, 2018 10:31 am

220v is within 10% of 200. It will likely be OK..
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DaveinOlyWA
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any probs?

Sat Mar 10, 2018 10:35 am

The fact that everyone uses 110 or 220 simply means that ya, you will be fine. Just need to be in the ballpark
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ELT201
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Re: 200V AC Japanese EVSE on 230V AC NZ Power system: Any probs?

Sun Mar 11, 2018 8:41 pm

groversum wrote:Can you suggest if after the modification you were able to use this charger or not... I have a similar situation and just asking if thats possible

I changed this transformer rectifier unit and install new one with 230V AC output 18V DC (see foto). Everything is ok.
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