The charge cable isnt the standard one. I had at one stage relocated the battery to the boot (and back again). The auto elec hadnt seen the car (was a phone convo) and he said some just had a larger charge cable.
I had an elec issue a few weeks back which had me inspecting all wiring, connections and a new bosch 85 amp alt. So i can confirm the terminals are in good nick. As are the earth's and the body earths are more than adequate size.
I have a Fluke 325 MM which has been assisting me in my fault finding.
This afternoon after work i checked battery voltage before starting. 12.4v.
I started the car with the dash in test mode and the voltage showed 14v. A mate was using the mm across the battery which showed 14.5 at idle.
Lights, blower fan, engine fan on and the voltage dropped down to 11.8 at battery at worst.
11.6 on the dash.
Turn the engine fan and blower off and things looked normal again, about 13.6 on the dash.
So standard accessories dont hurt it. If the idle was brought up to about 1500 we saw the voltage come back up over 12.5.
There was about 200milli volt loss between battery and dash readout. I see that as not bad.
So we think the issue is just an underprovisioned charge system.
My question now is, would a 120amp push enough juice at idle compared to an 85amp? Im aware they dont put out their potential at idle and thats where the magic needs to happen to get things good.
Cheers for all the replies guys