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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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CTEK Battery MonitorViews : 610 Replies : 7Users Viewing This Thread : |
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May 19th, 2019, 01:48 | #1 |
Volvo Driver
Last Online: Yesterday 18:47
Join Date: Mar 2016
Location: Basingstoke
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CTEK Battery Monitor
I got one - anybody know how to download the voltage graph??
Cheers Dave |
May 19th, 2019, 06:38 | #2 |
Premier Member
Last Online: Mar 20th, 2024 18:26
Join Date: Jan 2016
Location: Cross Country
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I have one too.
No download of data exists, only thing you can do is screenshot it. PS: do you also suffer the following problems: 1. Date is shown in wrong format, does not use the same format as your iPhone 2. Vertical intervals on the graph are totally weird time intervals 3. Voltage and Temperature do not display when not connected to the car I've sent CTEK feedback asking them to fix these issues
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
May 19th, 2019, 08:18 | #3 |
Premier Member
Last Online: Mar 20th, 2024 18:26
Join Date: Jan 2016
Location: Cross Country
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Here's a long term view of my battery voltage:
The two negative spikes were from leaving the parking heater running, and forgetting to turn the lights off. The general decay from 100% to 80% is caused by not using the car, every blip going positive is when I used the car. The sharp sudden rises to 100% are when I connect the battery charger. The long periods at 100% are caused by initially charger connected and then a fair amount of driving.
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
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May 19th, 2019, 23:54 | #4 |
Volvo Driver
Last Online: Yesterday 18:47
Join Date: Mar 2016
Location: Basingstoke
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Thanks Swiss - As I anticipated - you have provided more info than I have.
I also get the steady decline overnight - down to 80% - a colleague of mine suggests this is due to cooler conditions at night having a negative impact on terminal voltage?? I also get a small "charge" showing with a couple of hours driving at 50 mph/80 kph but a big charge when I leave the battery tender connected. I'm not sure if I know how to "screen shot" on my Android One+2 phone but I'll look into it. Be back later with more data but feeling a bit more secure now - Thanks. Cheers Dave |
May 20th, 2019, 00:17 | #5 |
Volvo Driver
Last Online: Yesterday 18:47
Join Date: Mar 2016
Location: Basingstoke
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And google is my friend (again)
Here's a screen shot of my results The big/long drop was when I was parked up on traffic survey duties; it was raining and I had to keep switching on to operate the wipers. The upward curve after is overnight battery tender connected I need to start logging exactly what's happening Parked - Driving - Charger connected - etc etc My concern is that the terminal voltage falls away overnight down to 80% ish on a frequent basis - (in steps it looks like) - what causes this? (obviously alarm etc contributes...) but why the steps... Cheers Dave |
May 20th, 2019, 08:09 | #6 | |
Premier Member
Last Online: Mar 20th, 2024 18:26
Join Date: Jan 2016
Location: Cross Country
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Quote:
The charge slowly drops because a) constant power drain from the car: clock, alarm, central locking, Volvo OnCall, and any other device using a memory: all use power all the time b) self discharge in the battery, which increases at lower temperatures c) chemical age of the battery: older batteries are less capable of holding a charge than newer batteries, due to the chemistry involved The CTEK Battery Sense takes some time to properly reflect the battery's state of charge. However you have had the CTEK Battery Sense connected for over a month, and me now for also about 2 months. So our CTEK Battery Senses should both have "learned" the charge cycles and be accurate (as can be). The fact that the battery drops about 1% state of charge a day was something I was not aware of, and never noticed, until I connected the Battery Sense. With measurements comes knowledge and insight. The Battery Sense does a great job of informing you as to the current state of charge, and when you should make the decision to connect a battery charger. As you can see, the battery sense estimates the time taken to recharge the battery (this is based on battery size which you configure in the app, as well as current temperature and charge voltage.). The time to fully charge the battery is actually much longer than you think! We used to say "drive for 30 min after starting a car from a flat battery to charge it up enough" but that would never have brought a 100% charge. It simple brings "enough" charge to keep you going. I saw my battery was at 80% on Friday night, so I put my 5A battery charger on the car at 21:30 The Battery Sense reported that the battery was fully charged at around 05:00, which is a charge time of 7.5 hours At 5A charger capacity, 5 x 7.5 = 37.5Ah added to my 90Ah battery. But the calculation is not that simple because the charge current and voltage is regulated, it is not a constant 5A. The CTEK charger reduces the charge current as the voltage increases. Assuming it is on average about 50%, that means the charger loaded about 18.75Ah to my 90Ah battery. Battery Sense reported the battery as being 80% before charging, which would be 72Ah (90 x 0.8 = 72) 72Ah + 18.75Ah = 90.75 Ah At which point I must congratulate myself on my math and my assumptions, because the results are perfect And as for the steps: you are simply seeing the charge time (engine running, charge state increasing) vs discharge time (engine not running). You should be able to correlate the data to your drive cycles. If you can, put the charger on for 24hrs to bring the battery back to 100% charge. Then monitor how it holds it's charge.
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
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