Smart charge problems

[urbtree]

I run a mobile tyre company and ever since I'v had my mk8 I've had problems running the inverter in it.

If I have smart charge plugged in it keeps overpowering my inverter and it goes into over volt protection mode and cuts power to my machines.

If I unplug the small single wire plug, Battery light illuminates and I don't get enough power through to the inverter (around 13v and drops to -10v underload)

as you can imagine this is causing real problems for me.

I'm going to try swapping the marine battery I have with a silver one as recommended by ford and see if this helps.
I suspect the single wire plug may just be cutting out the sensor and not the smart charge system itself

I've read about the 3 pin plug but can't find it and not sure if its one of the other wires to the alt (its a bit awkward to get at so I want to be sure I'm doing the right bit)

TIA
Mike

[urbtree]

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[robbie.cee]

That's possibly due to ecu controlling charge... you almost want second independent alternator just to run yer gear in back ...

[karl]

mrk 8 or mrk 7 you pic shows 7

[moley551]

If you look on the custom page, jasonx has found a possible solution to change smart charging to conventional charging it may be applicable to the MK 8