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[Jarrett]

Update:

Six day old 2019 FX had to be returned to the dealer to have the battery replaced due to a safety/power issue with it.

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Original Post:

Ok, another newbie question.

I go for a 30 mile ride today at 39 mph average. I started at 100% and return to the house with 16% showing.

I get off the bike and open the garage, walk back and now it says 24%.

I go inside and change clothes and come back, its at 33%

I turn it off and leave it for 2 hours, come back and turn it back on, still 33%

While I stand there for 5 minutes watching it, the gauge goes 34%, 35% and finally 36%.

I waited a bit longer, but it didn't climb any higher.  I turned it off and plugged it in.

So what happened?

Was it really at 16%?  Or was it at 36% the whole time and showed lower initially?  Is there some sort of 20% buffer in there?

[Curt]

There are rumors that the percent charge meter is self-calibrating and will get more accurate over time, especially if you ride the battery near empty. I have run it all the way down a couple of times (which internally is not completely empty).

My meter has always been optimistic by about 4%, but is otherwise precise and predictable. It doesn't jump around. Yours ought to settle down quickly.

[NoMoreIdeas]

FWIW I've ridden mine since October, and had alot of days at first above ~60F. I've found that the SOC is most consistent first above ~55, and second above ~35% SOC. If you get below both I found it varied quite a bit. Below 30% at 65F seemed fairly okay, but below 30% at 45F, the last 30% should have been 10% it went that fast.

Lithium batteries are tricky to measure SOC of, I know iphones actually use coulomb counters (count the electrons that pass from the battery to the circuit) to determine a more accurate amount of how much battery is left, but i'm sure this is more tricky / expensive with high amperage circuits. I'd imagine Zero just measures battery voltage which varies a lot with SOC and temperature.

[Jarrett]

The average temp on this ride was 46 degrees if that makes a difference.

[Richard230]

My 2014 S battery pack SOC-counter used to jump around by one or two percent when turned off and then back on.  However, my 2018 S has been very accurate, even when run down to "00". No jumping around when being ridden or being recharged and it doesn't change when the ignition is turned off and then back on.  I really have no complaints regarding the system.  It is a lot more accurate than any ICE motorcycle fuel gauge that I have seen. 

[Jarrett]

I'll call Zero today and see what they say.

I'd really like to know if I was at 16% or 36%.  That certainly makes a difference in the length of the ride.

[NEW2elec]

Check your bike's voltage with the app.  The big boys swear it's the best indicator of SOC.  There is also an app called "Zero Voltage" that isn't the company app but a few guys on here have it and like it.  It costs $5 and I haven't gotten it myself yet but I do plan to when spring hits.
Mostly just relax and enjoy your new bike. 

[Jarrett]

Getting a grip on the range anxiety (AKA what the battery is doing) will go along way to adding enjoyment to the ride, for sure.

[Jarrett]

Called Zero, they had no idea. 

They said to email them and they would get it routed to someone that hopefully knows.

[Crilly]

I have the same problem on a new 19 SR with power pack.  The % meter went from 19 to 26 while I was having lunch today.  When I get home it well charge 20% the first hour.  35 degrees today.

[Crilly]

19 SR with power pack.  Wind light, temp 32 degrees today.  100% to 0+ 4 miles.  95 miles total.  10.53 kWhs used.  110.5 watts per mile.  Full electrics worn.

Do these numbers seem right for a bike with 18 kWhs?

[DonTom]

19 SR with power pack.  Wind light, temp 32 degrees today.  100% to 0+ 4 miles.  95 miles total.  10.53 kWhs used.  110.5 watts per mile.  Full electrics worn.

Do these numbers seem right for a bike with 18 kWhs?

You left out the most important detail. How fast were you riding?

-Don-  Reno, NV

[Crilly]

How fast was riding.  It was a mixture.  About 40 mph to 45mph average.  The 110 watts per mile should be the tell.

[DonTom]

How fast was riding.  It was a mixture.  About 40 mph to 45mph average.  The 110 watts per mile should be the tell.

Considering the temp, I would say it probably is normal.

It would be interesting if you can do the same ride on a warm or hot day.

-Don-  Reno, NV

[Crilly]

Thanks