65% - that is just generally low and voltage drop would be in play there (did you get a chance to see what voltage was available?). It would be interesting to see how the battery goes in future use or an extended no-drive period (if you get the chance of course).
I had the same problem. Battery dropped 10 to 12% a day. After 3 day's, not possible to start anymore. Had to use several times the jumpstarted. Seems to be a fault battery. Battery replaced under warranty by the dealer, since then, no problem anymore.
Yeah, but this was after 2hrs of highway driving. I’ve not noticed any significant drop in battery level when stopped for a few days, just no charging beyond about 65%. It’s good to hear your new battery sorted everything so I hope Ineos can swap mine out too.
That was the same for me, driving whole afternoon on highway and secondary roads, the battery hardly loaded with 1 amp. That was another proof to give my dealer a reminder that something definitely was wrong.
Just for the information of the forum, next image is the voltage of my battery during a day of rest (14 November). I didn’t check the % in the Grenadier, but according to my Chinese monitor this should be close to 100%, if you compare to a snapshot four days later.
The latest thoughts on our failure are that maybe the dealer disconnected and reconnected the battery and didn’t tighten the terminals enough. After 2+ hours driving something might have worked loose. When the roadside assist guy jump-started it, he commented that his power pack should then start taking charge from the vehicle but was not. He got under the back seat and popped off one of the terminals then reconnected it and did another start. His power pack then started to receive charge as expected.
The problem was certainly terminal... in more ways than one..
Probably correct re. undercharging -depends on how you define "under charged" - but it should get to 90+% charge. However I don't think it's an AGM, rather a Moll "EFB" "enhanced flooded (wet cell) battery", optimised for Stop/Start equipped engines.
Tks for the update and sorry to hear about your woes. Seems very time consuming. Hopefully new battery will sort it once and for all.
I didn't need to as I was still able to jump start it using a power bank to drive it up on to the truck. But the fall back was just to put the transfer box in neutral as it's all mechanical.
I accidentally ran mine down to <31% ( wrong setting on the dashcam sensitivity while it's parked in the street
).
