lazbaz said:

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 minutes. With engine stopped after 30 minutes current is constant 0.15A Bonnet still open.
The new battery sticker says "Keep above 12.01V (50% discharged) and Warrantee (4 years) VOID 10.6V (100% discharged)"
What deductions can be made from these readings? Is 0.15A drainage still high?

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Datatek said:

Before fitting, the battery should have been fully charged as it may have been sitting on the shelf for some time and been in a low state of charge. With a small 4 amp charger it might need 24 hours or more to reach a full charge.
I have MF31-1000's in both my P38's and similar Hancook batteries in my transit and other cars, never had a problem with them.

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lazbaz said:

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

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lazbaz said:

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

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Mark Piercy said:

https://www.ebay.co.uk/itm/Alternat...d=link&campid=5337717012&toolid=20001&mkevt=1

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lazbaz said:

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

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Datatek said:

No P38 regulator has ever had a 12.2 volt set point so I suspect your regulator is duff

Linky no worky

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Datatek said:

Are you saying the voltage dropped to 12.61 with the engine running? If so the alternator is toast and may be the cause of the battery drain.
0.15A after 30 minutes is too high. Pull fuses one at a time to help identify where the drain is coming from.

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lazbaz said:

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.

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