That’s interesting. Can I ask why you chose not to just engage ready for your wait in the car?
Yes of course - This is my first full EV - I had a PHEV for four years before this.
So, I was trying to figure out the differences.
When you have your very first EV - you tend to treat it like any other car you have ever owned.
Quickly you start to grasp that they are a completely different beast in many respects.
I have learned a lot, but still have a LOT more to learn.
Unfortunately, so are some of the people we trust with fixing or cars it appears.
This was the point when I found out about the need to have the car in READY mode if you intend to sit for a long time while parked up.
I tend to boot up to READY mode now regardless.
In the summer time it can be a little more forgiving because a lot less equipment is running and therefore less likely to pull on the 12 volt system.
But in the winter, sitting in the car with everything turned OFF is no joke at all.
Many EV drivers of different makes and models have been caught out with under powered 12 volt batteries.
A lot of EV's have larger info units that rely on a computer to run them, look at the size of the unit in a Tesla for example.
The power these things can pull can not be compared to juice needed to keep your normal run of the mill radio found in older type cars powered.
They could fit larger 12 volt batteries of course, but this add's cost and weight.
Therefore, they install a battery that is just about large enough in normal day to day situations.
Ask more demand from this 12 volt battery, without it receiving a charge from the traction battery ( in ready mode ) and it is likely to drain more quickly than you would like or expect.