Voltage Boosting Diode

[peter69_56 Lurker Find all posts View Profile Close peter69_56]

If the ambient temperature is that low that the alternator will charge at 14.9V the
higher voltage is unlikely to hurt the battery you'll need the extra voltage to get some
charge into the battery, battery freezing might be more of a concern!

Cheers

Battery freezing is not an issue. We are talking 10-20C ambient. At that temperature my system charges 14.2v standard. So with the diode in place it would seem reasonable to see 14.9v. That to me seems too high.

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

Peter,

Where talking the standard high compensation OEM alternators, these alternators charge at around 13.8V - 14V with the ambient around 20C. If your getting 14.2V@20C then you should be able to get away without the need to fit a booster.

I would expect to see that sort of voltage with a standard alternator, not the OEM high compensation type used in the 150.

If your getting that sort of voltage with an OEM alternator then it would appear it has a faulty regulator but as it is working to your benefit I wouldn't worry about it providing the voltage does reduce in higher ambient temperatures.

Cheers