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[Lecram]

I have not used my 2015 DS (12.5 kWh + Powertank) for a few months and I had plugged my DS as written in the manual. After a few weeks, the battery was dropped until 88% (from 100% to 88% at once) and than to 70%. And yesterday, it showed 0% with only 0.049 kWh left in the battery!

I have unplugged and plugged the bike again and it started charging. But not until 14.1 kWh, like before, but now only until 11.4 kWh and 114V battery voltage.

The bike is stored in a heated garage, lowest temp is 15C

What went wrong?

[BrianTRice@gmail.com]

Definitely send logs to Zero, and get it to a dealer for diagnostics (don't wait for a response).

[nevetsyad]

Your cell imballance looks bad, 22mv? Ride it for a while, then bring it back in and charge it. Balance should be 3-5mv after charged past 100%.

[ctrlburn]

First Ride after 2 months of plugged in storage (parked end of November).

2013 S (12.5 battery) dropped 2 bars just walking it out of the garage.

2013 S @ 23 miles 54% SOC  (at work)
2013 S @ 45 miles 24% SOC  (back home)

After charging to 100% cell imbalance is 2mv (didn't get reading before) and doesn't drop after being unplugged.

Second Ride (3 days later - pretty much same temperature mid 30's F)
2013 S (12.5 battery) showed showed all  bars just walking it out of the garage.

2013 S @ 23 miles 72% SOC  (at work)
2013 S @ 45 miles 41% SOC  (back home)

[NEW2elec]

What in the world is causing this?  Maybe the chargers not turning back on and topping off?
I've always felt these bikes want to be ridden and than recharged but 2 month storage, plugged in, and only getting 45 miles before 24% SOC is a major red flag.
Keep us informed and see what Zero says.

[Low On Cash]

I'm sure Zero or someone might figure it out - If I had to guess, I would suspect the battery management itself is burning off a cell(s) in an attempt to balance the pack and since its stuck in that protocol of balancing, it never re-charges the pack.

 

[Kocho]

See my reply to this other thread

http://electricmotorcycleforum.com/boards/index.php?topic=6581.0

Not that it is going to solve your issue, which I think is not normal operation, but you might want to think about it...

[Kocho]

A reference point, FYI. As I mentioned in the other thread, my '15 SR has been sitting unplugged since early November. I left it at 100% and maybe 2.5 miles back then. A weeks ago rode it for some errands and dropped the SoC to mid-80%, with around 15 miles on the trip meter after that. Stayed at that until yesterday, when I took it out for 30+ miles or so of mixed riding. My objective was to drop the SoC to about 50% and leave it at that for the rest of the winter season. I did not notice any difference in miles per % charge yesterday vs. my normal daily usage in the warmer months (note my battery was probably around 50-60F from sitting in the garage). I was getting about 1 mile per percent drop in charge, which is about the normal average for the way I ride in mixed traffic conditions. Cell balance remained below 4mv at the end of the ride at about 50% SoC (was 3mv at about 85% SoC after having set for a couple of months).

It has been similar last winter, so I see absolutely no reason to keep my bike plugged-in for the winter. Others' situations may vary, but in my non-heated but non-freezing garage (if temperature matters at all), the bike keeps charge just fine off the grid for many months...

[Curt]

I left my 2016 FX plugged in while out of town for 1 week. When I came back, I was surprised to find it at 90%. I rode it a bit, and as long as it's used daily, it charges to 100%.

It seems that the charging system doesn't manage this case properly.

[Lecram]

I have contacted Zero and they said that the bike needs a firmware update, as the old software has a bug. I have sent the logs to them and wait for an answer

[Ndm]

Seems like it's charging the monolith only and not the power tank, the 12.5 kW  is full around 11.4 usable

[Lecram]

I received feed back from Zero after they had diagnosed the log files. They said that the powartank battery does not charge anymore as the battery voltage is too low. That means that this battery is defect and will be replaced under warranty. They will also update the firmware.

[Electric Cowboy]

I have contacted Zero and they said that the bike needs a formware update, as the old software has a bug. I have sent the logs to them and wait for an answer

Yeah older firmware was buggy for sure. Also so long as you don't forget your bike forever, I recommend leaving it between 60 and 80% charged if you're leaving it for a couple of months. But that's just my personal recommendation, I have 11391 miles on my 16 since April but it was sitting for the past two months while I was working on Chargers. It's colder out here now around 40 - 50 Fahrenheit and I don't keep the bike in a heated garage. And storing my bike this way I have never noticed a difference in the battery. And I have owned a bike each year since 2010.

Also something that you may want to pay attention to is the wind during colder months, a headwind, especially a cold headwind can dramatically affect your range because of the drag. On my latest trip I went to Mexico and I'm headed to San Francisco now and I noticed a range difference from as low as 50 miles per charge all the way up to 100 miles per charge depending on the Wind.

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