Alex1985
Established Member
- Joined
- Jan 6, 2023
- Messages
- 79
- Reaction score
- 138
- Points
- 50
- Location
- Bournmouth
- Driving
- MG4 Trophy LR
Just got back from a week away to a completely dead car.
Waiting for the AA man.
Waiting for the AA man.

I would think there must be some sort of problem here. I've mentioned before that we left our car parked for six and a half weeks and it was fine when we got back. I was half expecting a problem as the manual mentions disconnecting the 12v battery if you are leaving it for a longish time (4+ weeks from memory) and I had left ours with the battery connected. As it was, the car unlocked from the key fob and came to life as normal.That's scary. I hope it turns out to be a fault, because if we can't leave our cars parked up for a week without them dying on us, we're all in trouble.
Hos much charge was left in your HV battery? Its discussed on another thread that it will not charge 12v battery if HV battery is below certain level of charge.Just got back from a week away to a completely dead car.
Waiting for the AA man.![]()
If I have understod it right that's when one have turned off auto lights and forget to turn of the lights when leaving the car after shuting it down. Then it eventually will empty the 12v.Sorry didn't realise the car was awake...I assumed the car was off but the lights were left on when you went to the shops in which case the hv batteries would not be topping up the 12v battery. There seems to be a few cases where apparent 12v intelligent charging may not have kicked in and the battery has went flat.
The car was left to charge itself on the solar controller and had reached it’s cut off of 90% after 4 days, so at which point the 12v system was working ok so I did not need to check it after that.Hos much charge was left in your HV battery? Its discussed on another thread that it will not charge 12v battery if HV battery is below certain level of charge.
Bear in mind each time you connect to the app to view the car it wakes the car up and consumes the 12v battery.The car was left to charge itself on the solar controller and had reached it’s cut off of 90% after 4 days, so at which point the 12v system was working ok so I did not need to check it after that.
In future I shall keep an eye on the 12v battery voltage on the app whilst I am away.
Yes I appreciate that, but twice in 7 days should not I think flatten the battery. I believe the battery has a dead short in it which has rendered it unserviceable.Bear in mind each time you connect to the app to view the car it wakes the car up and consumes the 12v battery.
Yes I appreciate that, but twice in 7 days should not I think flatten the battery. I believe the battery has a dead short in it which has rendered it unserviceable.
I could not recharge it as it drew too much current and was causing the charger to trip, the AA man had the same problem and in my experience that is generally caused by a shorted cell or cells.
He had a spare battery which he installed, then followed me to the garage. The warning lights were on and messages flashing the whole time which I guess just need resetting once the fault is rectified.