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120v operation with the current 40a Advanced Kit

I think I know the answer to this, but I wanted to double check before ordering.  

Will I be able to use this kit with a regular 110v nema 5-15 household outlet for the time being until I get 220v installed in my garage later this year or next year?  I'd like to buy one charger now and upgrade it to fit my needs.

Sorry if this is a newb question.  I have some wiring experience from building guitar amps and various automotive projects, but no experience with circuits like these.


Yes. the Advanced series will take whatever voltage you provide to it from 90 up to 264. 120v, 208v and 240v all work great.

OpenEVSE Support


I just bought an Advanced OpenEVSE kit.

Am going to make the unit portable with a 14-50 plug.

For a 14-50 connector to 5-15 plug, exactly how is an adapter cable wired?

Thanks and good health,  Weogo

NEMA 14- 50 Ground to NEMA 5-15 Ground

NEMA 14-50 Hot 1 to NEMA 5-15 Hot 1

NEMA 14-50 Hot 2 to NEMA 5-15 Neutral


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That's what I figured, just wanted to make sure.

Good health,  Weogo

 If you're feeling more wealthy than handy, it looks like you can buy these:

 Hi Tony,
That's a nice looking assembly.
I do live audio production and build a lot of cabling.

The reason I originally asked the question is one video showed
tying the ground and neutral wires, which I understood to be a no go.
I've searched but can't find the video to post a correction.

Thanks and good health,  Weogo

@OpenEVSE Support, thanks for the 14-50 to 5-15 wiring info. I am in a similar situation. I plan to use 220V at home for faster charging, but there is only 110V at work. Can I simply solder one 14-50 cable and one 5-15 cable at the input end of the openEVSE charger? Will the openEVSE charger auto detect the input voltage? Thanks a lot.

Hi George,

Please clarify, are you talking about having a 'Y' cable, with one leg having a 120V plug, and the other a 240V plug?

This would not pass code, as you would have a live connector exposed.

I suggest putting a 14-50 on the end of the cord.

Then make a short adapter cord with a 14-50 receptacle going to a 5-15 plug.

Additionally, a solid screw connection can be more durable than soldered.

Soldering can create a stress point where the wire can break.

Most aircraft wire connections are high quality crimps or other mechanical fasteners.

Yes, OpenEVSE will auto-detect the input voltage.

Thanks and good health,  Weogo

Yes, I was thinking about a 'Y' cable. Thank you for the explanation. I will make an adapter cord then.

Can anyone help me...I bought this one and my new openevse is not working.

Any ideas?


The RV adapters will not work they are wired differently than EV adapters.

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Thank you so much for that information and for responding to me I really appreciate it I was not aware of that.

Hi, I know this is an old topic that I'm bumping, but it's a top result in search engines, including on the help forums here.
Is it still true that the Advanced series supports 120v operation?
The stations page specifically calls out that level 1 charging isn't supported, but I can't find any info on the switch being made. is it specifically a plug issue where an (ev specific) adapter can be used still, or was this a hardware revision?
If the former, may I suggest an edit to the page to maybe note "(adaptor required)" or even "unsupported" (given that there's plenty of people who would take that as a green light to try to pull 48A from a 15A socket...)
If the latter, can the first response on here be edited to reflect this change so there's not conflicting info as the first 2 results on search engines?

The current 2024 48A Advanced kit includes a Packard C240C contactor with a 208-240v coil. It will not activate at 120v. So, that makes the kit Level 2 only.

The for Level 1 only operation the contactor can be replaced with a Packard C240B with a 120v coil.

For Both Level 1 and Level 2 operation the contactor would need to be replaced with a 12v relay such as the Struthers Dunn relay. It actuates from 12v DC power from the AC/DC power supply.

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