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[JaimeC]

Last night I plugged in my 2018 Zero S into my garage 110V outlet before I went to bed.  This afternoon (7/27/20) when I went into the garage to take the bike out for a lunch ride the warning light was flashing and the bike was only at a 93% charge instead of the expected 100%.  I turned the key off, waited 30 seconds and then turned it back on and it appeared to be back to normal.

I took it for a ride but I thought it might be a good idea to dump the log and see if someone here might be able to figure out what happened.  It behaved perfectly normal all afternoon but I wanted to be sure.  Thanks in advance for any information you can provide.

[TheRan]

The only error code it's throwing is low motor voltage (0x3100 and 0x45c) which is presumably because the module (battery) isn't connecting, but no mention of why that would happen. After giving that error it does then say "Battery module XX contactor closed" (where XX is a number) and then gives the pack voltage, but then gives the error again when the Sevcon turns back on. The numbers range from 36 to 242 so I'm not really sure what those could be referring to. I would guess that because it happened while the bike was stationary and charging and managed to (if only briefly) reconnect without being moved that it's not a hardware connection issue.

[JaimeC]

I saw that and it didn't make any sense.  We're having a heat wave here right now but night time temperatures are only in the low 80s so that shouldn't be outside of the proper temperature range to cause an issue.  I know people in the southwestern States routinely see much higher temperatures.  I haven't plugged it back in since this happened.  When I initially plugged it in the other night, the battery was down to 27%, so it did charge up MOST of the way before it started flaking out.  Hope someone has some ideas.  I pulled the battery log too, but didn't really see anything that looked out of the ordinary there.

[TEV]

Why don't you just try to charge to 100% ?

[DonTom]

Last night I plugged in my 2018 Zero S into my garage 110V outlet before I went to bed.  This afternoon (7/27/20) when I went into the garage to take the bike out for a lunch ride the warning light was flashing and the bike was only at a 93% charge instead of the expected 100%.  I turned the key off, waited 30 seconds and then turned it back on and it appeared to be back to normal.

I took it for a ride but I thought it might be a good idea to dump the log and see if someone here might be able to figure out what happened.  It behaved perfectly normal all afternoon but I wanted to be sure.  Thanks in advance for any information you can provide.

Your OBC could be crapping out. A common symptom is low DC output voltage so the battery never charges to full. If you have a Delta-Q charger around, it should then charge to 100%.


-Don-  Reno, NV

[JaimeC]

The bike is still under warranty so I'll try charging it up using just the onboard charger and see what happens again. If it fails again, it's off to the dealer for however long that'll take.

[JaimeC]

Plugged it in for the night.  Let's see what it looks like in the morning...

[JaimeC]

Plugged it in for the night.  Let's see what it looks like in the morning...

Everything looks good so far.  Bike was at 100% and everything was green (no flashing warning lights).  Never heard back from either Zero or my dealer...

[DonTom]

Everything looks good so far.  Bike was at 100% and everything was green (no flashing warning lights).  Never heard back from either Zero or my dealer...

I just reread your original message. Somehow, I didn't notice about that alarm last time and how key on and off fixed it.  The exact same thing has happened to me a few times with my DS when it had its old battery.

It only happened occasionally and never since the battery was replaced under warranty.

But it started to happen when I started to notice shorter charge times to full (when it didn't alarm) and much reduced range, especially at higher speeds.

I am not saying it is a symptom of a bad battery, I am only telling you my own experience with the same issue, so it makes me wonder if it's a possibility.

In my case, it could have been the way the BMS was reacting with a battery issue. But it didn't happen often but the first time I noticed it was around the same time I was expecting I had shorter range and faster charge times than usual.

And what a BIG difference the new battery made in range, especially at higher speeds,  but it's  also now a 7.2 instead of a 6.5 KWH.

-Don-  Reno, NV

[DonTom]

One more thing . .I just did the FW updates on both of my Zeros.  I noticed these updates said they were related to the BMS. Be sure you have the latest FW updates.


-Don-  Reno, NV

[JaimeC]

Yup... I'm current.  The battery log didn't show anything that appeared to be out of the ordinary.  Hey, I wouldn't mind getting a free upgrade from my 13kWh battery to a 14.4kWh one!

[DonTom]

  Hey, I wouldn't mind getting a free upgrade from my 13kWh battery to a 14.4kWh one!

Yeah, I hope my two batteries in my SR crap out in time! But so far, they are fine.

-Don-  Reno, NV

[JaimeC]

Well, it happened again so I contacted my dealer and sent him my MBB log.  They'll talk to Zero and see what they think.  I'll keep everyone posted.

[JaimeC]

Doing an experiment tonight.  Charging it up using JUST the external "Quick Charger."  It only maxes out at 10 amps instead of 12-13 like the onboard charger, but I have all night.  Let's see what it looks like in the morning.

[Crissa]

Well, aren't the Quick Charger units 1000W?

-Crissa