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Alternator amp'age

Discuss the problems with your X5 (E53).
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X5Sport
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Re: Alternator amp'age

Post by X5Sport » Thu Oct 18, 2012 9:24 pm

Convention is that anything for a 12V car is shown as '12V'.  Even a 12V car battery actually isn't - it's 12.6V DC
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dark_stranger
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Alternator amp'age

Post by dark_stranger » Thu Oct 18, 2012 9:55 pm

Sorry for being dim, i wont pretend to understand. so could i put a 12volt 140amp alternator on my car?  All the car part sites, when i enter my reg, bring up a range of alternators from 80amp to 150amp, with 12 and the odd 14v units. With the 140 amp ones being the dearest.

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Re: Alternator amp'age

Post by X5Sport » Thu Oct 18, 2012 10:00 pm

Personally I would expect it to be a 12V/140A unit.  I've never seen a car one listed as a 14V one......for exactly the reason you're asking, it confuses the hell out of people!

'12V' ones all produce 14.4 - 14.6V when running anyway......that what a 12V battery needs to charge it.  Those listed as '14V' are probably listing the output voltage rather than the type of vehicle it's intended for i.e. a car.

Richard
Last edited by X5Sport on Thu Oct 18, 2012 10:03 pm, edited 1 time in total.
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