Thanks for your support.
Appears the 12v battery is flat, I presume you can charge these like traditional car battery.
Need to get car running again so can go and get battery properly replaced tomorrow once garages open
Couple of points here.
Firstly, I assume you have access to a relatively recent 12 volt battery charger ?.
Which are of the “Smart” variety, that will deal correctly with the newer types of 12 volt batteries ( gel mat etc ).
The older type lead acid wet cell, non smart batteries chargers are not suitable for modern batteries.
You can disconnect the main battery lead(s) before charging if you wish, but it not totally necessary if you have one of newer smart chargers like the CTEK units.
The smart charger ( when connected ) will firstly access the status of the battery, then charge it in the correct manner to suit its condition.
Some units have a recovery button on the charger.
CTEK actually sell a “Quick Connect” kit for a £5 that is permanently attached to the battery, making for a rapid connection set up with there units.
I have one fitted to my ZS EV.
Secondly, try and recap on recent events that COULD have caused the 12 volt battery to end up with a SOC that is that low !.
Is it simply a faulty battery or is there another user condition that could have contributed to the problem here ?.
E.G. - Sitting in the car with 12 volt items running ( radio etc ) without the car in the full READY mode ?.
In STANDBY mode, the 12 volt items are usable, but the 12 volt battery is NOT getting charged remember.
The SOC of the 12 volt battery, may have dropped SO low now, it is not recoverable even after a slow overnight charge.
If it takes a charge and you are able to boot up the car to the ready state, go into the settings and makes sure the 12 volt is now receiving a charge from the HV battery ( via the inverter ).
It’s important to try and understand what caused this situation in the arise in the first place, or it could well happen again.
IF it’s just a faulty battery, then that’s okay !.
Top Tip - Think about purchasing a 12 volt jumper pack for the future and carry it with you in the car.
It is very likely that the odd warnings you where receiving on the dash panel, where a result of the 12 volt battery being so low.
A good SOH / SOC of the 12 volt battery on an EV is equally ( if not ) more important than the condition of a battery on a ICE car.