ELM70:
I should have mention that both EVBatMon and WatchDog works only with a small selection of ODB2 adapters
Its OK, I saw that and tried ploughing through them but the links were everywhere but the UK so I assumed the principle of avoid the cheap clones - but that didn't work. The PanLong was no good so that's going back and I have now ordered an iCarSoft i620 which is what I should have done in the first place. I spent thousands on a new car then tried to save £20 on the OBD adapter - what am I like?
As Chris Miller says my GX3h doesn't have MMCS - I did save thousands there! For me the important thing was to get the PHEV and I couldn't afford the higher spec with all the gismos. I don't need satnav and I can still use the mirrors for reversing!
I have a monitor almost identical to the Bangood TS-836B you posted. The problem is that the waterproof outside plug has a flap above it so to use the monitor I need to plug in an extension lead, and apart from the fact they say don't use an extension lead, a quick shower could blow a fuse or two. The monitor on the extension lead does work fine - nothing gets hot - and so I am now doing some monitoring that way but it is not a permanent solution. In time I may well put a meter in the wire to external socket.
I don't think a clamp meter will work because the lead has currents going both ways which cancel one another out. A clamp meter is best when you can put it on one of the wires.
All said and done it is now looking as though my batteries are probably not too bad, my last trip was 19.4 miles with a guesstimate of 7 miles still left in the batteries, temperature was a balmy 25C. Replacing the charge took 6.71KwH at a cost of 73p (3.77p per mile). Our Fiesta is currently averaging 13.2p per mile fuel cost, and, of course, it is pumping loads of CO2 into the atmosphere.
So I am now waiting for the OBD adapter to test the batteries SOH and see if I still have a SOH.
Best wishes
Adrian