Low battery issue...

hhuhuh · Aug 16, 2023

My 2021 V4s showed 'Low Battery' alarm while I was riding.
After 2-3 min, DES alarm, ABS alarm, and others came on dash and the bike was dead.

I took out battery and charged using a battery tender/charger for Li battery then put it back on.
It was fine for about 20 min and the same alarm came out.

I guess it's time to replace a battery. Hope it's not a stator issue...

rikkie07 · Aug 17, 2023

Looks like a charging issue. Can you measure the charging voltage? Should be around 14,3V.

hhuhuh · Aug 26, 2023

rikkie07 said:
Looks like a charging issue. Can you measure the charging voltage? Should be around 14,3V.

The dealership suggested me to replace a battery but still it causes the same issue.
As you pointed out, there seems to be a charging problem.
Thank you!

Mr V4 · Aug 31, 2023

hhuhuh said:
My 2021 V4s showed 'Low Battery' alarm while I was riding.
After 2-3 min, DES alarm, ABS alarm, and others came on dash and the bike was dead.

I took out battery and charged using a battery tender/charger for Li battery then put it back on.
It was fine for about 20 min and the same alarm came out.

I guess it's time to replace a battery. Hope it's not a stator issue...

I hate to tell you this....But it is the stator. I have the same bike (21 V4s). Battery low warning light came on, then DES light, then bike died. Battery is not being charged. Check your regulator/rectifier. If it is not that then probably the stator. My bike only has 11k km I am hoping this is a once off issue...

Mr V4 · Aug 31, 2023

hhuhuh said:
The dealership suggested me to replace a battery but still it causes the same issue.
As you pointed out, there seems to be a charging problem.
Thank you!

You can check the output with a multimeter. Warm the bike up and hold the RPM at 5k as this should be where the stator/generator pushes out the most current. Should get around 14v. Anything higher than 14v means your regulator is gone and over-charging your battery. But if the battery hovers around 12.8 and starts to drop then it is more than likely your stator

Mr V4 · Sep 6, 2023

hhuhuh said:
My 2021 V4s showed 'Low Battery' alarm while I was riding.
After 2-3 min, DES alarm, ABS alarm, and others came on dash and the bike was dead.

I took out battery and charged using a battery tender/charger for Li battery then put it back on.
It was fine for about 20 min and the same alarm came out.

I guess it's time to replace a battery. Hope it's not a stator issue...

Did you get your bike sorted? Was the issue resolved?

hhuhuh · Sep 6, 2023

Mr V4 said:
Did you get your bike sorted? Was the issue resolved?

Thank you for your comments!

I talked to the dealership today and the manager noticed the alternator (or stator) was totally fried... As you mentioned, I think I have the same issue that you had.
When this happened on the road, I got the same error messages on my dash just like your case.
The manager told me that there were some cases where the bikes with Li batteries have a charging issue.
Hopefully, I can pick up my Panigale this weekend and will ask more details about the problem (plus, the cost can be enormous...).

Thank you again for your input!

Mr V4 · Sep 6, 2023

hhuhuh said:
Thank you for your comments!

I talked to the dealership today and the manager noticed the alternator (or stator) was totally fried... As you mentioned, I think I have the same issue that you had.
When this happened on the road, I got the same error messages on my dash just like your case.
The manager told me that there were some cases where the bikes with Li batteries have a charging issue.
Hopefully, I can pick up my Panigale this weekend and will ask more details about the problem (plus, the cost can be enormous...).

Thank you again for your input!

Awesome well I am glad that you are making progress on this! I still need to get mine fixed. I really hope this is a once off issue as previous gens do not seem to have this issue. How many KM's on your bike? My bike is going in next week to get the stator/magneto checked. Bike is still under warranty so glad it happened whilst still under warranty.

hhuhuh · Sep 7, 2023

Mr V4 said:
Awesome well I am glad that you are making progress on this! I still need to get mine fixed. I really hope this is a once off issue as previous gens do not seem to have this issue. How many KM's on your bike? My bike is going in next week to get the stator/magneto checked. Bike is still under warranty so glad it happened whilst still under warranty.

It's always better to get checked just in case. Also, your warranty is still valid, why not? Yeah, when I had 1199s, I bought it too early to have lots of other issues but got covered with warranty, not for V4s. I put 9000 miles in 2 years and have gotten annual service every year. Maybe, this problem is beneficial so long as the dealership is checking everything haha.

Mr V4 · Sep 7, 2023

hhuhuh said:
It's always better to get checked just in case. Also, your warranty is still valid, why not? Yeah, when I had 1199s, I bought it too early to have lots of other issues but got covered with warranty, not for V4s. I put 9000 miles in 2 years and have gotten annual service every year. Maybe, this problem is beneficial so long as the dealership is checking everything haha.

For sure. I am pretty confident it is the stator coil (same as yours). But if you could share what feedback the dealer gives you after getting it back will be great. I am more worried about the root cause as I do not want this happening again. I put just over 6500 miles on mine, annual services and extra oil change in between just to keep it even more tip top. Sorry to hear about the 1199 problems but at least it was covered in the warranty. But yeah make sure they check your V4 thoroughly and can give you the root cause of the issue to mitigate it happening again in the next 9000 miles.

Mr V4 · Sep 8, 2023

Also came across this post. Something to check with your local ducati mechanic/dealership to make sure your bike is not involved in this recall. It appears this recall was with regards to shattering flywheels it is good just make sure.

2021 Ducati Streetfighter V4 & V4s recalled for faulty Flywheel (Generator Rotor)

Ducati North America has issued a recall on the 2021 Ducati Streetfighter V4 and the Ducati Streetfighter V4s which includes 156 potentially involved units that might be affected by the recall. The

motoridersuniverse.com

hhuhuh · Sep 9, 2023

Mr V4 said:
Also came across this post. Something to check with your local ducati mechanic/dealership to make sure your bike is not involved in this recall. It appears this recall was with regards to shattering flywheels it is good just make sure.

2021 Ducati Streetfighter V4 & V4s recalled for faulty Flywheel (Generator Rotor)

Ducati North America has issued a recall on the 2021 Ducati Streetfighter V4 and the Ducati Streetfighter V4s which includes 156 potentially involved units that might be affected by the recall. The

motoridersuniverse.com

Oh, this recall note is helpful but I have not received any recall notification mail. I will stop by today and bring this up. Yeah, I don't know whether the stator coil is involved with Li battery or just a bad luck faulty coil set. Ether case, this will be solved since I just replaced a lead-acid battery instead of Li battery and a new stator will be installed.
If I have a chance, I will take some photos of the engine and the stator so that I can post them.
Hopefully, I can pick it up soon so that I can enjoy both riding and autumn colors in this New England area!

Mr V4 · Sep 10, 2023

hhuhuh said:
Oh, this recall note is helpful but I have not received any recall notification mail. I will stop by today and bring this up. Yeah, I don't know whether the stator coil is involved with Li battery or just a bad luck faulty coil set. Ether case, this will be solved since I just replaced a lead-acid battery instead of Li battery and a new stator will be installed.
If I have a chance, I will take some photos of the engine and the stator so that I can post them.
Hopefully, I can pick it up soon so that I can enjoy both riding and autumn colors in this New England area!

That would be great if you could share pictures and feedback from the dealer. I highly doubt that changing the battery from Li-Fe to a normal Lead battery is going to make a difference (if that indeed was the cause). Li-Fe batteries are far more resilient and have a lower discharge rate than a Lead battery. Your stator doesn't modulate its output. At a certain RPM it will emit a certain voltage due to the increase speed of the fly wheel. The regulator/rectifier is was modulates the output (not only to change from AC to DC) which charges your battery. I would question with your mechanic as to if they can determine the root cause. But researching on the web it seems it is not a common thing to happen so maybe our bikes got a 'bad batch'. Our bikes were designed to run with Li-Fe batteries and so many previous Gen models are still running with Li-Fe batteries without issue. Good luck and hope you get your bike back soon. I am dying to ride!

hhuhuh · Sep 10, 2023

Mr V4 said:
That would be great if you could share pictures and feedback from the dealer. I highly doubt that changing the battery from Li-Fe to a normal Lead battery is going to make a difference (if that indeed was the cause). Li-Fe batteries are far more resilient and have a lower discharge rate than a Lead battery. Your stator doesn't modulate its output. At a certain RPM it will emit a certain voltage due to the increase speed of the fly wheel. The regulator/rectifier is was modulates the output (not only to change from AC to DC) which charges your battery. I would question with your mechanic as to if they can determine the root cause. But researching on the web it seems it is not a common thing to happen so maybe our bikes got a 'bad batch'. Our bikes were designed to run with Li-Fe batteries and so many previous Gen models are still running with Li-Fe batteries without issue. Good luck and hope you get your bike back soon. I am dying to ride!

Thank you for your thought!
When I saw the error messages on dash, it was running about 2-5 min and dead. This happened with Li battery. When I switched to a regular lead-acid battery based on the dealer recommendation, it only showed 'Low Battery' while it's running but not shutting down. That's the difference that I observed. I heard that the Ducati Service Rep also suggested the dealers that Li battery is still questionable and it's better to use a lead-acid one. Maybe that's why the stock Li battery (Skyrich) is not available nowadays. Still, I don't think Li battery causes a burnt stator but do think a lead-acid battery doesn't shutdown the engine even at low voltage.

Anyways, here is the picture of the generator/stator set. It's darkened and I could take some black chunks out (bottom of the picture) from the coil. Seemingly, oil or something burnt and covered coils possibly due to the short circuit. I asked the tech whether there was an oil-leak from the engine since I saw burnt solid around the coils. The tech said everything was ok including flywheel (Thank you for sharing the info!), oil-leak, fuses, etc. The tech also checked the short circuit and thankfully no issue. As you said, I guess we got a 'bad batch'.

I will keep you updated in this chain!

bp_SFV4 · Sep 10, 2023

I'm very reasonably sure Li battery technology is pretty well sorted in 2023 despite the opinion of that service rep.

The issue is the way voltage falls off with Li batteries. It drops off a cliff. You go from having a useable voltage to non-useable with little warning.

Mr V4 · Sep 11, 2023

hhuhuh said:
View attachment 51274
Thank you for your thought!
When I saw the error messages on dash, it was running about 2-5 min and dead. This happened with Li battery. When I switched to a regular lead-acid battery based on the dealer recommendation, it only showed 'Low Battery' while it's running but not shutting down. That's the difference that I observed. I heard that the Ducati Service Rep also suggested the dealers that Li battery is still questionable and it's better to use a lead-acid one. Maybe that's why the stock Li battery (Skyrich) is not available nowadays. Still, I don't think Li battery causes a burnt stator but do think a lead-acid battery doesn't shutdown the engine even at low voltage.

Anyways, here is the picture of the generator/stator set. It's darkened and I could take some black chunks out (bottom of the picture) from the coil. Seemingly, oil or something burnt and covered coils possibly due to the short circuit. I asked the tech whether there was an oil-leak from the engine since I saw burnt solid around the coils. The tech said everything was ok including flywheel (Thank you for sharing the info!), oil-leak, fuses, etc. The tech also checked the short circuit and thankfully no issue. As you said, I guess we got a 'bad batch'.

I will keep you updated in this chain!

Thanks for sharing this! That coil is definitely toast! Do you have a battery tender/charger that you keep the bike on when not riding? Would be great to determine the root cause for this failure but with electronical components it it hard to isolate exactly. Only thing I can think of is the battery was too low and over time the stator needed to over-work to charge the battery up each time (although Li-Fe have quick charging times). I may get my battery load tested to see if it is causing any extra strain on the charging system. But thank you for sharing and fingers crossed this doesn't happen again in the near future.

hhuhuh · Sep 11, 2023

Mr V4 said:
Thanks for sharing this! That coil is definitely toast! Do you have a battery tender/charger that you keep the bike on when not riding? Would be great to determine the root cause for this failure but with electronical components it it hard to isolate exactly. Only thing I can think of is the battery was too low and over time the stator needed to over-work to charge the battery up each time (although Li-Fe have quick charging times). I may get my battery load tested to see if it is causing any extra strain on the charging system. But thank you for sharing and fingers crossed this doesn't happen again in the near future.

bp_SFV4 said:
I'm very reasonably sure Li battery technology is pretty well sorted in 2023 despite the opinion of that service rep.

The issue is the way voltage falls off with Li batteries. It drops off a cliff. You go from having a useable voltage to non-useable with little warning.

I agree. Li battery technology has been improved well enough but the low voltage issue seems to be a problematic. Considering my Pain (2021), this problem is probably from the faulty generator rather than a Li battery. Hopefully, a new generator clear out any further issue. Thank you!!

hhuhuh · Sep 11, 2023

Mr V4 said:
Thanks for sharing this! That coil is definitely toast! Do you have a battery tender/charger that you keep the bike on when not riding? Would be great to determine the root cause for this failure but with electronical components it it hard to isolate exactly. Only thing I can think of is the battery was too low and over time the stator needed to over-work to charge the battery up each time (although Li-Fe have quick charging times). I may get my battery load tested to see if it is causing any extra strain on the charging system. But thank you for sharing and fingers crossed this doesn't happen again in the near future.

It was so ridiculous!! I couldn't say anything but laughed. I have not used a battery tender even though I have one for Li battery. The tender I have is a Deltran. When I had this issue for the first time, I took out the battery from my Panigale and charged. I also checked the voltage after charging and it was 12-13 V. When the 'Low Battery' alarm was on the dash, I took it out and measured the voltage. It was 8 V or below and I thought it was a battery issue. Well, now I know it was a charging issue.

I would check the battery with charge/discharge, just in case. During idling, the voltage on the dash typically shows 14.0-14.3 V as I recall (even in winter).

I will keep you updated.

Mr V4 · Sep 11, 2023

hhuhuh said:
It was so ridiculous!! I couldn't say anything but laughed. I have not used a battery tender even though I have one for Li battery. The tender I have is a Deltran. When I had this issue for the first time, I took out the battery from my Panigale and charged. I also checked the voltage after charging and it was 12-13 V. When the 'Low Battery' alarm was on the dash, I took it out and measured the voltage. It was 8 V or below and I thought it was a battery issue. Well, now I know it was a charging issue.

I would check the battery with charge/discharge, just in case. During idling, the voltage on the dash typically shows 14.0-14.3 V as I recall (even in winter).

I will keep you updated.

For sure! Yeah with everything running properly (stator and rectifier you get 14.0 - 14.3V direct to the battery which is normal. Anything above that rectifier is gone and typically anything less than that stator is gone. Will keep an eye out for your updates. Hope you get to ride soon!

hhuhuh · Sep 16, 2023

Mr V4 said:
For sure! Yeah with everything running properly (stator and rectifier you get 14.0 - 14.3V direct to the battery which is normal. Anything above that rectifier is gone and typically anything less than that stator is gone. Will keep an eye out for your updates. Hope you get to ride soon!

Hello sir!
I brought back my V4s haha! Unfortunately, the weather is not helpful but tomorrow would be great!
Enjoy your riding!

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