Charge!

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Norwegian
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Post by Norwegian » Mon Dec 11, 2017 10:46 am

Hi!
My Z4 is in storage because of winther.
I have the oem AGM battery.
What is the max charge voltage, 14,4 or 14,7?

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ph001
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Post by ph001 » Mon Dec 11, 2017 11:01 am

14.7v would be the boost charge voltage setting for agm but for storage over winter you would either be wanting a float charge of 13.5v (constant) or pulse charge.
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Post by Norwegian » Mon Dec 11, 2017 11:22 am

I use CTEK Ready to go.
It has a Normal and a AGM mode.
AGM gives max 14,7 and Normal 14,4..
CTEK tells me to ask BMW. Bmw sends me on a trip around.... =nowbody knows.

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EssexZed
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Post by EssexZed » Mon Dec 11, 2017 11:56 am

I’ve noticed that BMW now sell a re-badged CTEK battery charger https://shop.bmw.co.uk/bmw-uk/en_GB/p/g ... PID_91584/ and out of interest I entered the VIN of my 2015 35iS to check compatibility. Was surprised to see it appears to be incompatible - anyone have any idea why?
Current: 2015 E89 35iS Valencia Orange
Previous: 2010 E89 23i Auto Space Grey

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Post by Norwegian » Mon Dec 11, 2017 12:21 pm

Dont fit mine either, incompatible..

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Ducklakeview
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Post by Ducklakeview » Mon Dec 11, 2017 12:32 pm

Just plug the ctek in on std not cold setting and it'll be fine.

Mike

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Post by Norwegian » Mon Dec 11, 2017 9:54 pm

Ducklakeview wrote:
Mon Dec 11, 2017 12:32 pm
Just plug the ctek in on std not cold setting and it'll be fine.

Mike
Ok, il try that, thanks

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