ajh Posted December 1, 2010 Share Posted December 1, 2010 I have two batteries fitted and I'm wondering what 'type' of Alternator is fitted to the 200TDI? Specifically does it have voltage sense cables or can I use a simple 3-pole charging isolator? Quote Link to comment Share on other sites More sharing options...
David Sparkes Posted December 1, 2010 Share Posted December 1, 2010 Personally, and I post because others may be in the same state, I don't know what you mean by a "3-pole charging isolator". It may be because we don't speak the same English. That's an observation, not a criticism. Can you find a picture from a retailing site? Even better a wiring diagram, so we can understand the functionality? I haven't Googled for you, because I may not find the kit you are familiar with. HTH Quote Link to comment Share on other sites More sharing options...
Biffo Posted December 1, 2010 Share Posted December 1, 2010 I believe the original alternator fitted to a 200TDi is a 45amp unit, these are not a problem unless you start doing a lot of winching when an upgrade to a 75amp is the preferred route. I also have no idea what you mean by "3-pole charging isolator" However, with 2 batteries it's best to have a heavy duty split charging relay wired into the system, with the alternator charging the "winch" battery up, and the "car" battery charged via the split charger. Quote Link to comment Share on other sites More sharing options...
ajh Posted December 1, 2010 Author Share Posted December 1, 2010 A charge isolator takes the alternator output and then splits it between the two batteries so that when you discharge the accessory battery disconnected from the starter battery you can re-charge it without draining the starter battery. A 3-pole means that you have one connector for the alternator and one for each battery positive post. A 4-pole isolator has 4, the same 3 plus one for a voltage-sense wire, presumably because without a sense-wire the alternator does not know how much to supply to the battery. I'll give it a try and keep a meter on things. I do hope it's at least 60A though, even just headlamps plus the stereo amp and computer will be pushing a 45. I wanted to save the AC location for an air-pump but it's looking like a 200A alternator/welding generator might be a better choice (a Xena one likely) since I could then attach that to the accessory battery and leave the stock one on the starter battery and have proper fault tolerance. Quote Link to comment Share on other sites More sharing options...
sighnbox Posted July 22, 2013 Share Posted July 22, 2013 I have a 200tdi and standard wiering ....I have 6 x 55 spots plus the biggest sterio system poss running 3 huge amps ...I had a 120amp alternator built and that copes more than fine with what I'm doing.....Sub is 3000W I have four 6x9 1000W each and front componats are 350W each pluss DVD screens etc ITS LOUD VERY LOUD and is constantly on every time I drive ........alternator copes fine I just turn it off 1/2 mile from home. Quote Link to comment Share on other sites More sharing options...
western Posted July 22, 2013 Share Posted July 22, 2013 I have two batteries fitted and I'm wondering what 'type' of Alternator is fitted to the 200TDI? Specifically does it have voltage sense cables or can I use a simple 3-pole charging isolator? factory standard was a 45amp, but a 65amp can be fitted, mine has a 100amp marrelli alt fitted. Quote Link to comment Share on other sites More sharing options...
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