I will do my best to answer your questions as honestly as I can based on my limited winter experience of the Elroq – took delivery end of July.
If I am going out on a frosty morning I will always bring cabin up to 19c and defrost windows and mirrors – then put a/c on low to prevent any steaming up – this will use battery if not plugged in and effect range before getting in car.
If I then continue with a/c on medium the range will be lowered and I will see it in real time – rough guide -10 – 20%.
however if I were going on a long journey in below freezing temperatures – would do all defrosting etc whilst plugged in – on commencing journey would have heated seats on a/c off and fan on low – not for any mile saving masochistic reasons , but because for the first 30mins – 60mins this works – I would expect a drop of 5-10%.
My previous EV was a Kona and ticked many of the same boxes – but where the Elroq 85 differs is its speed of charging – so occasional expensive on the go charging for speed and convenience, for me is acceptable.
The Elroq for me is still a learning experience – I am in my seventies and don’t do a high mileage – shopping, gym and visiting family are my main destinations.
I am very pleased with the car – it just has kit that is practical mainly non gymicy and just works – reminds me of old Volvo’s.
Hope this gives some insight 👍