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aussieambo Profile
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X-TRAIL NEWBIE
 


Date Registered: 10-2008
TOTAL POSTS: 23
Reply | QUOTE
T32 Diesel Manual - Variable Voltage Alternator


Hi all, I have just purchased a T32 diesel X-Trail to replace my T31. I took it down to an auto electrician and asked about additional wiring to charge my Arian battery and to have the caravan fridge operating on 12 volt. He looked under the bonnet and said that I had a variable voltage alternator, which I had never heard of before. He said that I would require a DC - DC charger as the alternator would stop charging when my caravan battery got to 100 % charged, at the expense of the vehicle battery, which would continue to drain while using the car's A/C, lights etc. Has anyone experienced a similar problem and are there other (cheaper) options available?
Thanking you all in anticipation.
 Cheers
Graem

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Cheers

Graem X-1020

Previously 2008 T31 TS Diesel Manual

Now T32 TS Diesel Manual
22/Jun/2017, 12:01 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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X-TRAIL HOLIC
 


Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5406
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Re: T32 Diesel Manual - Variable Voltage Alternator


Here is an article about it from REDARC
REDARC BCDC for ECU controlled Variable Voltage Alternators

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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22/Jun/2017, 6:29 pm Link to this post Send Email PM   Send Private Message Blog
 
CaptK Profile
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X-TRAIL NEWBIE
 


Date Registered: 03-2017
Location: Sydney, Northern Beaches
TOTAL POSTS: 60
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Re: T32 Diesel Manual - Variable Voltage Alternator


Variable Voltage Alternators have been used in Pajeros for a while now (Our other vehicle is a Pajero) and yes, a BC-DC charge is the best option.

In the early days - blokes would try and "trick" the alternators to continue charge by running headlights on all the time, but they quickly worked out that you basically need to run Headlights on High beam, along with the Rear demister on, seat heaters on and the HVAC fan at full to be able to draw enough current to continually draw from the battery when driving at about 2000rpm as the alternators were so efficient...

So BC-DC is the best option.... emoticon



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Be Yourself... Everyone else is already taken.
X-5047
2005 Auto Ti-L (Sunroof)
24/Jun/2017, 4:13 pm Link to this post Send Email PM   Send Private Message Blog
 
ahto42 Profile
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Date Registered: 06-2012
Location: Estonia
TOTAL POSTS: 44
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Re:


Revome the connector from the sensor, then is is all time 14v. Later T31 have them too. in a long term the system ruins the battery, because when you drive, the voltage is only 12,7-13,2v. Maybe in warm regions it is enough, but with start/stop systems, the battery is undercarged.

http://www.nissantechnicianinfo.mobi/htmlversions/2016_Feb_March_Issue_6/VoltageControl.html

*It keeps the load as low as possible to maximize fuel economy.
*It makes sure the alternator supplies enough power for all of the systems that are operating.



https://www.qashqaiforums.co.uk/viewtopic.php?f=29&t=3214

The QQ forum has a good discussion and a solution at the end.

Mine is plugged off now.

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Member id X-2451
Name: Ahto
Location: Estona, Tartu

Model: T31 II 2012 Diesel Auto, LE
13/Jul/2017, 11:34 pm Link to this post Send Email PM   Send Private Message Blog
 


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