I’m completely running the battery down until the generator stars,I’ve been using the heaters a lot to do it while driving 42 miles to work and then home after a charge at work.
I’ve had the car 2 years so far,she’s a middle 2013 production and 2014 reg.
It was giving 9.9 kw when I first had her,now I’m getting 10.5 -10.9 but slightly less mileage with the heaters set to 24*c.
If I’m not using the heaters I’m getting 10.5 every time and 42-43 miles in temps ranging from -2 to +9 *c.
I’ve not done the battery update,I’ve serviced it every year myself,and tyres are correct LRR and 45 psi.