2004 Hymer S820 alternator (1 Viewer)

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Apr 26, 2015
3,048
7,507
Ottershaw
Funster No
36,067
MH
Hymer S820
Exp
First motorhome May 2021
Hi all, does anyone know what size alternator was fitted to these, it's on a Mercedes 616 chassis, there appear to have been several different ones fitted to Sprinters in terms of AH's ranging from 90 to 150ah and I also spotted a 200ah on ebay that said it was suitable just wondering if anyone has experience of this, my current one is only throwing out 13.1 volts.
 

jumar

LIFE MEMBER
Nov 6, 2012
3,957
12,531
Spain
Funster No
23,578
MH
Hymer Tramp
Exp
Since 1994
I don't know how true this may be...but when our alternator broke I was told that Hymer upgrade them to cope with the extra required for a MH...
Ours is 2006 Based on a Renault Master chassis...
Having said that, I can now claim to know a bit more about 12v electrics, so doubt this, to be fact...or is it. My charge rate is 13.7v...
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
54,958
157,516
On the coast in West Sussex
Funster No
658
MH
Carthago Compactline
Exp
Since 2008 & many years tugging
Normally Hymer fit uprated alternators but the only way to confirm is to get the part number off the alternator.
As it looks like it's faulty you are going to have to take it out anyway.
 

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