gudy
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Location: Mountain View, CA

AV EVSE ... not silent anymore

Tue Jan 11, 2011 9:25 pm

Yesterday night, I noticed a sound in my home (some kind of rumbling buzz, similar to what you hear bellow high voltage lines), while my car was charging. It was late so I didn't want to get outside and see if it was the EVSE, but tonight, after coming home and plugging the car, before the timer stops the charging, the car charges for a few seconds, and I heard the same noise. I had never heard that noise before, and therefore I'm wondering if something could be wrong with my AV unit.
The car charged fine last night, but I'm not a big fan of this noise, and it's certainly not reassuring.
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Boomer23
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Re: AV EVSE ... not silent anymore

Tue Jan 11, 2011 10:07 pm

Gudy, you have a warranty on that AV EVSE and mwalsh posted that he'd been told that one of their EVSEs caught fire a while back. I'd call AV immediately. As I recall, you didn't have AV install it, but they are still on the hook for the proper and safe function of the product.

Especially given the early phase we are in both with Nissan and AV being concerned about this roll-out, and also given your high public profile, I'd bet serious money that they'll be on your doorstep within the day.
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johnr
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Re: AV EVSE ... not silent anymore

Tue Jan 11, 2011 11:19 pm

Boomer23 wrote:Gudy, you have a warranty on that AV EVSE and mwalsh posted that he'd been told that one of their EVSEs caught fire a while back.
And I thought the EVSEs were supposed to make things *safer* :shock:
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EVDRIVER
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Re: AV EVSE ... not silent anymore

Tue Jan 11, 2011 11:32 pm

johnr wrote:
Boomer23 wrote:Gudy, you have a warranty on that AV EVSE and mwalsh posted that he'd been told that one of their EVSEs caught fire a while back.
And I thought the EVSEs were supposed to make things *safer* :shock:

Properly built ones. EVER seen inside an AV EVSE?

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LEAFer
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Re: AV EVSE ... not silent anymore

Wed Jan 12, 2011 12:13 am

Switch to L1 immediately and turn off circuit breaker to AV until resolved. Do you notice the noise using L1 ?
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garygid
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Re: AV EVSE ... not silent anymore

Wed Jan 12, 2011 12:19 am

In your opinion, what is "improperly" done, please?

Is it anything specific, such that there might be a recall on these AV EVSEs?

Or, just the jumble of small wires possibly touching the probably-hot relay?

Or, something else?

Thanks for any helpful insight and education. My experience is more with very low-power digital circuits, not with this kind of stuff.
Again, Thanks. PM if necessary.
See SOC/GID-Meter and CAN-Do Info
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garygid
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Re: AV EVSE ... not silent anymore

Wed Jan 12, 2011 12:26 am

Yes, check these:
1. is the noise a low hum or buzz,
2. coming from the AV unit, and NOT from the LEAF
3. does the noise stop when you unplug the e-hose from the car?

And turn off the breaker (power TO) the EVSE, and keep it disconnected from the CAR.

Do try the L1 EVSE and verify that the LEAF is charging properly with the L1 EVSE.
See SOC/GID-Meter and CAN-Do Info
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GroundLoop
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Re: AV EVSE ... not silent anymore

Wed Jan 12, 2011 12:31 am

I'm not a doctor, but..

If the sound coming from the EVSE is a 'hum' and fairly quiet in a quiet garage, then it might be normal. There are a number of torroid chokes, transformers, low-current DC converters, and other inductive parts in the EVSE that will vibrate with the alternating current.

If you put your ear to your laptop power supply, you can hear a hiss, buzz, or hum. When the room gets quiet enough, just about every electrical device makes some kind of noise.

My solar inverter, for example, is called "silent" with no fans or moving parts, but on a hot day in the quiet garage, you can hear the inverter working feverishly and sizzling away with high-current switching action.

Anyway, if the EVSE sound is louder than quiet, or 'raspy', I would be concerned. Get your nose near it too.. if you smell anything "hot" or baking, be concerned.

And yeah, if it's significant enough to post about, I'd call AV and ask them to come check it out regardless.

kolmstead
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Re: AV EVSE ... not silent anymore

Wed Jan 12, 2011 8:02 am

Contactor humming? The big relay that switches power on and off to the car. Especially noticeable if the EVSE happens to be mounted to the wall adjoining your bedroom. It that's the cause, it is annoying, but not a serious problem.

-Karl

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mwalsh
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Re: AV EVSE ... not silent anymore

Wed Jan 12, 2011 8:30 am

Boomer23 wrote:Gudy, you have a warranty on that AV EVSE and mwalsh posted that he'd been told that one of their EVSEs caught fire a while back.
Oh gosh, no....not caught fire....I was told that one melted down some.

Don't want AV's lawyers calling me to find out why I'm making libelous statements about their products! :?
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