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I have a 2000 4.6 auto Petrol P38 Icelandic Blue Vogue Code 621 colour built on 30th August 2000 left the factory with 18" Hurricane wheel rims and has done 98,000 miles.

============ I have Hankook MF31-1000 and Hankook told me the fully charged battery will have OCV of 12.8 to 12.9 volts. What alternator do you have? Make and model? I am interested because I want to fit the Mobiletron VR-VW010 but not sure if it will fit my alternator.

============== kermit What alternator do you have? Can you show me a pic of it? I would like mine to be 14.7 volts too. See pic attached. I have asked Datatek for advice. I hope someone can help.

================ Datatek, I have Hankook MF31-1000 Calcium battery (I may have posted about it elsewhere). I have looked for a voltage regulator set to 14.8 volts for my Bosch alternator (see pic). Can you help me find one that will fit my alternator or can you suggest what can be done to the...

Could you please give me the name, model and if possible a pic of your alternator. Thanks

Hi all, If an alternator was made to deliver 14.8v, will it affect/deteriorate/malfunction/destroy the P48 Instrumentation and functions? An open debate. Hope to hear all reasons and suggestions.

I will have to start doing that. I believe you have mentioned somewhere that you have rigged up so you can monitor the drain with all doors closed. Could you give me an outline how you have done that. I would like to rig up and connect to a laptop and monitor for few hours.

What is low state of charge? Battery terminal voltage down to what, 12.5V,12V,11.5 or lower to what voltage before it will not recover?

So it is imperative for me to get the alternator to deliver 14.8 V? Otherwise the battery will die quite quickly?

I read somewhere "The typical lead acid charging voltage is between 2.15 volts per cell (12.9 volts for a 6 cell battery) and 2.35 volts per cell (14.1 volts for a 6 cell battery). The ideal charging voltage for a calcium battery is 14.8V for the recombination process to properly occur" What...

Datatek, I can find the regulator on ebay. Elsewhere you have said you have 2 P38s. How did you fit the regulator to the alternator? On my P38 the alternator is Bosch (see picture). Can the regulator be fitted to this?

I can find it on ebay as well as other places. My question is will it fit on the alternator I have on the P38? Alternator is 150 Bosch 0 123 520 022 NC> 14V 90-150A ERR 3434

A few readings: 28/10/21: 11.94V first in the morning (engine stopped); engine idling 14.3v, dropping to 12.61v after 7-10 min. 9/10/21: morning 11.91v; idling 14.21v; 14.1v after 7-10 min 19/10/21: morning 12.0v; idling 14.2v; 14.16v after 7-10 min. I do have some battery drain problem which I...

I am still struggling with my battery Hankook MF31-1000A which I fitted after reading on this forum. Now I read that for that battery the alternator set point should be 14.7V. My P38 setpoint is 14.2V. I also read that a voltage regulator set to 14.7V needs to be fitted. I tried the net but...

1. What charger will do the job? 2. The P38 alternator voltage is set at 12.2V but this battery needs 14.7V. How can the setpoint be set to 14.7V? 3. I read a new voltage regulator need to be fitted. I googled but cannot find any regulator. Help

This morning the voltage across terminals was 11.94V. I started the engine and voltage was 14.3V and after few seconds dropped to 13.96V. After 10 minutes it showed 12.61V. Bonnet (Hood) open all the time. With the engine running current drain was 14 to 15.07Amps, dropped to 4.19A after few...

I just fitted MF31-1000. Standing overnight on my drive and next morning it could not start the engine. I had to use GB40 NOCO Buster Plus. The battery voltage was below 12V. I am guessing this not just BECM waking up-may be some other source of drainage. Please list/mention other most likely...

So how to know if it is 16 or 18 for sure?

Hankook MF31-1000 it will be. Some points to clarify: (1) Grrrrrr says " Check setpoint on your alternator is above 13.8V if fitting a calcium battery and anything with 1000CCA". Yes it is Calcium battery. (2) I read this "Calcium batteries are the most commonly fitted battery; they also go by...