2013/2014 XKR Battery/BMS Differences
#1
11-12-2021, 10:00 PM
2013/2014 XKR Battery/BMS Differences
I replaced my battery in my 2014 XKR last year with an AGM battery of same size. The old battery in my car was replaced by the previous owner in 2015. I replaced it because it was 5 years old. The battery I installed is an Interstate MTX-49/H8, an AGM battery with 900 CCA. This battery is recommended on the Interstate website to fit 2010-2013 model years. The battery Interstate recommends for a 2014-2015 XKR is MT-93/T8 which is an 800 CCA battery, non-AGM battery. Jaguar recommends the T8 size battery for my 2014 XKR. I also reset the BMS after installing the new battery.
I drove my car, without any problems, all summer without using a battery maintainer because I used it at least once a week. I used my battery maintainer, optimate 6, yesterday because the car was slow turning over when I started it the day before. The battery maintainer finished its charging cycle indicating the battery is in good (yellow/green LED), but not excellent condition (green LED).
Questions:
1. Why are the batteries different for 2010-2013 and 2014-2015? The battery for 2014-2015 seems to be a smaller battery and Interstate doesn't recommend an AGM battery. Could this be because the Battery Management System (BMS) was changed for 2014-2015 models?
2. My car never shows the voltage is above around 13.4 when driving it. At idle the voltage reads around 12.4. I believe other members have a similar experience for 2013-2015 model years. Is this because of the BMS? Most cars when running showing voltage at around 14.2.
I drove my car, without any problems, all summer without using a battery maintainer because I used it at least once a week. I used my battery maintainer, optimate 6, yesterday because the car was slow turning over when I started it the day before. The battery maintainer finished its charging cycle indicating the battery is in good (yellow/green LED), but not excellent condition (green LED).
Questions:
1. Why are the batteries different for 2010-2013 and 2014-2015? The battery for 2014-2015 seems to be a smaller battery and Interstate doesn't recommend an AGM battery. Could this be because the Battery Management System (BMS) was changed for 2014-2015 models?
2. My car never shows the voltage is above around 13.4 when driving it. At idle the voltage reads around 12.4. I believe other members have a similar experience for 2013-2015 model years. Is this because of the BMS? Most cars when running showing voltage at around 14.2.
#2
11-13-2021, 06:20 AM
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That was fun.
I found that these cars call for
2014 battery c2p24168, alternator not s/c c2c19630, alternator c2d59622 s/c
2013 batt same, alt same , alt same
2012. batt same, alt same, alt same
2007 (of interest to me) batt same, alt c2p1974, same for s/c.
The battery called for is a wet cell battery. I think meaning not AGM, as the same battery is listed for my car, a 2007.
I was unable to find a reference to the BMS, so I’ll need someone else’s help.
The AGM battery requires a unique maintenance management solution from the wet cell battery. Being that your relatively new battery shows as “good”, I can’t help but wonder if in fact your car’s charging system is not geared to this situation as its only a year old… or your maintainer is killing it. Or it was in a “good” state on purchase.
I wonder ‘where’ on the car the voltage is read from, on charging (engine running of course) and not charging. That might be interesting to know. Perhaps a reading of system voltage from different points around the car might show a different picture. ie across the alternator vs across the battery vs the cigar lighter socket.
FWIW, I do not drive my car daily. I do not use a maintainer. I don’t lock the car when its in the garage. And as I currently live in a freaking cold city in the winter, she sometimes sits for months on end. But, I have replaced the alternator once, and I have replaced the battery on occasion; like you around every 5 years. The car tells me when its time to change the battery… whenever the tell tale signs of a depleted battery present themselves. Slow to start would be one such sign to me. Another is the slow startup of the infotainment system.
I found that these cars call for
2014 battery c2p24168, alternator not s/c c2c19630, alternator c2d59622 s/c
2013 batt same, alt same , alt same
2012. batt same, alt same, alt same
2007 (of interest to me) batt same, alt c2p1974, same for s/c.
The battery called for is a wet cell battery. I think meaning not AGM, as the same battery is listed for my car, a 2007.
I was unable to find a reference to the BMS, so I’ll need someone else’s help.
The AGM battery requires a unique maintenance management solution from the wet cell battery. Being that your relatively new battery shows as “good”, I can’t help but wonder if in fact your car’s charging system is not geared to this situation as its only a year old… or your maintainer is killing it. Or it was in a “good” state on purchase.
I wonder ‘where’ on the car the voltage is read from, on charging (engine running of course) and not charging. That might be interesting to know. Perhaps a reading of system voltage from different points around the car might show a different picture. ie across the alternator vs across the battery vs the cigar lighter socket.
FWIW, I do not drive my car daily. I do not use a maintainer. I don’t lock the car when its in the garage. And as I currently live in a freaking cold city in the winter, she sometimes sits for months on end. But, I have replaced the alternator once, and I have replaced the battery on occasion; like you around every 5 years. The car tells me when its time to change the battery… whenever the tell tale signs of a depleted battery present themselves. Slow to start would be one such sign to me. Another is the slow startup of the infotainment system.
Last edited by guy; 11-13-2021 at 06:30 AM. Reason: typos and stuff.
#3
11-13-2021, 07:36 AM
Veteran Member
The conversation's been had before. Flooded batteries are the most common factory fitted though Jaguar did use AGM on some models. BMS has no issue with AGM batteries. I had AGM in the 2008 and have used AGM as replacements in anything I've had before without issue.
Voltage of 14.2 is from the alternator not the battery. By design BMS will cause battery voltage to fluctuate as it does not always keep the battery fully charged as part of its routine.
Voltage of 14.2 is from the alternator not the battery. By design BMS will cause battery voltage to fluctuate as it does not always keep the battery fully charged as part of its routine.
#4
11-13-2021, 07:56 AM
Veteran Member
#5
11-13-2021, 10:10 AM
Senior Member
2. My car never shows the voltage is above around 13.4 when driving it. At idle the voltage reads around 12.4. I believe other members have a similar experience for 2013-2015 model years. Is this because of the BMS? Most cars when running showing voltage at around 14.2.[/QUOTE]
My Subaru’s BMS works similarly. Lower voltage charge unless under a heavy load. Have you measured your voltage with the headlights on?
My Subaru’s BMS works similarly. Lower voltage charge unless under a heavy load. Have you measured your voltage with the headlights on?
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