Re: can squeeze 700km from a single full battery charge
I find (small Diesel car) two noticeable effects on range. One is rain. If the roads are wet - particularly the motorway - the car uses more fuel, I suppose because the rolling resistance is higher.
The other is a step-change usually sometime in November, and another one in perhaps late February. I have absolutely no evidence to back this up, but remember how Diesel always used to "freeze" in the winter? How we'd see news footage of lorry drivers lighting fires under their fuel tanks? Why does that never happen now? Is it because there's a special, slightly thinner, "winter mix" of Diesel being sold?
If there is, then that might explain at least a part of the "step change" I see in the winter, though obviously more use of lights, heaters, even air-con and (on average) wetter roads all contribute.