So the Patrol has been parked in the garage for the last two weeks. I go to start it yesterday and nothing, not even a light on the dash came up, like I had not connected the battery. I check that, yep its connected. I grab the DMM and test it. 1 Volt!. Feck! I chuck the Ctek MXS 10 charger and nup, she won't even fire up. Hmm, so I grab my 30 year old 8amp charger and use this until some voltage was getting in, then I quickly switch over to the Ctek before the volts drop again to low for the Ctek to work. Got it going.
The Ctek has been on recond mode since around 2'ish yesterday and I check at 6am this morning and its still charging and hasn't reached the trickle stage yet.

So before I have to go get a new battery, I need to find what is draining the battery so fast.

The starter motor was playing up for a bit there, when my daughter was driving the Patrol she got caught out a few times with the Patrol not wanting to start, even when warm, in the end the Patrol would not start at all so I tapped the solenoid with a hammer and its been good ever since.

Could a sticking solenoid drain power when switched off?