J11 Battery charging system problem

ICE, Equipment, Options
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duncho
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Post by duncho »

Connect was showing incorrect voltage reading before update, which was 0.4 - 0.5V higher than in reality. I mentioned this somewhere on the forum in the past.
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alans220
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Post by alans220 »

I have been keeping a check on the voltage for a while it is steadily decreasing. I do lots of decent trips, 100 miles, but the charging system never seems to boost the voltage at the end of the day.
The voltage this morning was 11.6v.
I managed to read the thread on the Nissanclub.cz site (after translation) and read that if you start the car with the bonnet open the charging system is by-passed. So I tried that this afternoon and it does work, only been for a short drive, 20ish miles, stayed charging at 14.5v all the way.
Just put my car in the garage at a healthy (ish) 12.3v, much better that before.
At least this is a work-around which I will use again when necessary to boost the battery voltage.
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alans220
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Post by alans220 »

So my car is back today after 13 days at the dealers due to a non starting flat battery problem, again.
A new battery was fitted 3 months ago, (which made no difference) the car is 6 months old.
Apparently a software update should have been done a while back, and a 'brand new' software update was also installed.
This will put right the previously under charging that was affecting my car.

We will see..........

To be continued.........
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Weasel
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Post by Weasel »

Each morning after the car has been sat on drive all night the Connect system is showing about 12.5v with the engine turned off, is this a healthy reading or should it be higher?

Also, can anyone tell me if the new Varta batteries on the 2019 cars are of the AGM variety? then I know what setting to put the C-TEK charger on Normal or AGM.

Thanks

Andy...
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calnorth
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Post by calnorth »

Weasel wrote: Sat Jul 13, 2019 8:01 am Each morning after the car has been sat on drive all night the Connect system is showing about 12.5v with the engine turned off, is this a healthy reading or should it be higher?

Also, can anyone tell me if the new Varta batteries on the 2019 cars are of the AGM variety? then I know what setting to put the C-TEK charger on Normal or AGM.

Thanks

Andy...
12v is the minimal level and should not fall lower overnight. In practice I get drops to 11v and still get a start but that demonstrates pretty much the 10% game in electrics as regards precise specification figures. Below 11v indicates likely cell problems/fail




Colin
Last edited by calnorth on Sat Jul 13, 2019 9:00 am, edited 1 time in total.
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Pandjh
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Post by Pandjh »

20190407_102758.jpg

In my experience, an AGM battery would state it quite clearly.
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duncho
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Post by duncho »

It’s printed on the label, stating that it is EFB.
Last edited by duncho on Sat Jul 13, 2019 3:29 pm, edited 1 time in total.
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Weasel
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Post by Weasel »

Thanks guys...so is EFB an equivalent to AGM?
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Post by Pandjh »

EFB is halfway between a normal battery and AGM one.

I'd play it safe and charge as per a normal battery.
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Weasel
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Post by Weasel »

Thanks Pandjh...I'll see how it goes.
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