GregH
Well-known member
JasonA said:Just out of curiosity, what is the max AC a Leaf wants to see or will charge on? !
293V
JasonA said:Just out of curiosity, what is the max AC a Leaf wants to see or will charge on? !
Actually that's a mighty fine offer! I might take you up on it.. I could video record the failure and show the Nissan guys...Boomer23 said:davewill said:Can you get to somebody's house, preferable someone who bought the AV EVSE? Then you can at least report that it is failing at multiple residences, and on "their" EVSE.GregH said:Ugh.. this is going to be a challenge.. I talked to the service guys at Tustin Nissan and they don't seem to appreciate the difference between line voltage (208 vs 240) and the brand of EVSE. I tried to explain how the EVSE is not the issue and it's a matter of measuring line voltage but some of these guys don't seem to be aware of the difference between 208 and 240 for L2 charging. My hope is to take the car in on Wednesday and have them do a Consult Freeze Frame Data snapshot of my car charging vs one of their cars charging.. that should show a dramatic difference on the "AC Input Voltage". But I'm still left with: "Well, it charges ok here (at the dealership, on 208V) so the problem must be with at your house". sigh. ...
Greg, if you need to show that it doesn't charge on an AV EVSE on 240, you can use my AV unit. Just PM me.
Doh!! Hey I still have 61+Ah! Hmm.. I'll try to get some better measurements... and probably check to see if that's on a 15A to 20A breaker :/drees said:No, that's just what the effect of a shrinking battery does for you. Used to take me 3.5-4 hours to charge from LBW to 80%. Now it takes less than 3 hours!GregH said:Oddly it seems to be charging faster than I would have expected L1. Last night I got a 60% charge in under 8 hours. I'm surprised I didn't pop a breaker. Is it at all possible that the 2011/12 OBC does NOT measure line current?
drees said:No, electricity doesn't work that way. Your car only gets utility line voltage (~120V) no matter what. And it won't exceed the 12A dictated by the EVSE, either.GregH said:If it really thought it was getting 170V and told to charge at 12A by the pilot PWM (it does think it's on a normal charge btw.. not a trickle charge) would it charge at 2kW AC (170x12) on the line side? It seems to be putting out closer to 1500W DC to the pack rather than 1000W or 1200W.... ?
GregH said:The charger clearly knows the DC voltage and current.. and a faulty AC line voltage. But I can't tell from any of the Consult data that it's actually measuring the current into the charger. My implication was that the faulty line voltage reading might cause it to pull more than the 12A the pilot PWM is telling it to.. If it knows the DC voltage, DC current, AC voltage, and charger efficiency then it wouldn't HAVE to measure line current, it could come up with a close approximation. That would be pretty cheap on their part and unlikely I guess. But suppose it thinks it's on a normal (not 120V) charge at 170V line and the pilot PWM tells it to pull no more than 12A.. It could calculate the expected power draw for the DC side and regulate to that. BTW unlike the 2013s, the 2011/12 OBC seems to only have steps of 1A on the DC output side (not sure if that's requested or measured DC current..)
But note that the EVSEUpgrade power supply is only rated for 250VAC. That's what Phil puts on the sticker, anyway. Perhaps he can tell us if that is the actual limit or if it can take more voltage than that. Mine has probably seen around 256 VAC and it is still ticking!GregH said:293VJasonA said:Just out of curiosity, what is the max AC a Leaf wants to see or will charge on? !
It sounds like a fire hazard to me!GregH said:Last night plugged into L1 (120V) at 91 Gids.. 8 hours later the car was "full" at 252 Gids. Not sure when it finished, but that's at least 20 Gids/hr on L1!! As I noted before, the car doesn't think it's on L1, it thinks it's L2 @ 170V, 12A EVSE limit... but it must be drawing more than 12A because I know the voltage is 120V.
GregH said:Got it plugged into a standard Panasonic L1 EVSE at Tustin Nissan and on the Consult tool saw it read 173V. Actually for a few seconds it went back to 120V but then drifted back up to 173V. As best I can tell from the service manual, AC lines go right into the charger. So whatever is messed up, it's inside the box. Technician and head service manager were witness. Looks like I'll get a new OBC out of this once they've done all the paperwork to get one for me.
Oh and the L1 charging at 120V (err, seen as 173V L2) actually charges at nearly 24 Gids/hour (!!!) That's better than half what it does at 240V normal L2. The cord gets warm but the plug looks ok and its on a 20A breaker. I guess it'll do until I can get the OBC replaced and use my L2 EVSE again. Really surprised the OBC doesn't read line current.. or at least doesn't have a software feedback control loop for it. Shocking
A hand held multimeter will tend to read high when the internal battery gets low. Probably a longshot.GregH said:Perhaps some sense resistor in the OBC to measure line voltage got slightly tweaked?!?!? Very odd failure though..
Last update was over a month ago. Anything further to report?GregH said:Update.. Talked to Rick Enriquez, the head service manager at Tustin Nissan (and witness to my OBC problem measuring 173V on 120VAC) and it sounds like he's bumped it up to the main Leaf service group at Nissan. Unfortunately due to the holidays he doesn't think we'll hear back from anyone until early next week.
Yeah.. Last Thursday they had me bring in the car (again) so they could "record" the data to upload to the mother ship at Nissan in order to get permission to order a new charger.Stoaty said:Last update was over a month ago. Anything further to report?GregH said:Update.. Talked to Rick Enriquez, the head service manager at Tustin Nissan (and witness to my OBC problem measuring 173V on 120VAC) and it sounds like he's bumped it up to the main Leaf service group at Nissan. Unfortunately due to the holidays he doesn't think we'll hear back from anyone until early next week.
Thanks for teaching Nissan how to diagnose this problem! The knowledge will come in handy when it happens to other Leafs.GregH said:As of tonight.. 120V = 120V and 240V = 240V. I can now charge at 3.3kW and home!
finally..
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