Disappointing winter range

[dsimpkins]

Actually (@Andy pandy) I've just noticed that your profile says SE LR ... I thought it said SE SR earlier, hence my scepticism. In that case 229 miles at 100% is more reasonable at this time of year for the (supposed) 61.7kWh battery pack. (281 miles WLTP if I recall right).

281 WLTP is correct, and 229 is about right for this time of year. Mine says about the same at the moment after a full charge and balance.

 

[JIS]

Wow that's a lot worse than the 130 miles that EV Database predicts for the SE at 70mph in minus 10 degrees. That is 2.6mi/kWh.

100 mile range would mean 2mi/kWh.

And here was I thinking I could make it from South Oxfordshire to Nottingham in one charge tomorrow if we took my car.

Here in SW France where it's been -2°C overnight, and very low temps during the day. We are seeing 2.7 miles per kWh. Obviously my car shows it as 23 kWh/100km but ChatGPT has done the maths !! Yes, this is not great but, it's not a problem. It only becomes a problem if you don't expect it or haven't planned for it.

 

[Rapax]

I live in Serbia, and we had a few days of spring temperature recently. So, 0-2°C and next day 15°-19°C . That was a real good way to see how low temperatures affect my 77ER. And it's increase/decrease of ~40% in town.
Yesterday I had a trip of 120km, half was a highway 110km/h, half country roads 70km/h. Consumption was 19kWh/100km and it was -3°C. In 20°C it would be probably ~16kWh/100km.
Heat pump is a good thing on longer trips, and not so much in the town.

 

[Bam Bam]

I live in Serbia, and we had a few days of spring temperature recently. So, 0-2°C and next day 15°-19°C . That was a real good way to see how low temperatures affect my 77ER. And it's increase/decrease of ~40% in town.
Yesterday I had a trip of 120km, half was a highway 110km/h, half country roads 70km/h. Consumption was 19kw/100km and it was -3°C. In 20°C it would be probably ~16kw/100km
Heat pump is a good thing on longer trips, and not so much in the town.

Thanks for that detail.

There are indeed other factors as well as the main ones of ambient temperature and speed (air/road resistance).

For a short trip the efficiency will be low (as it is for ICE cars) because you do all that warming and then hardly drive any miles.

 

[Rapax]

For example, on the highway at 110km/h in the winter I have the same consumption as in the summer on 130km/h. I was new to ev's but now after doing some tests I know what to expect, so I don't care so much. That's why I bought 77kWh model

 

[Anon70]

I think the car industry should just state that WLTP = Would Like To Pretend, in the same way that ICE car combined MPG figures varied wildly between owners actual MPG experience.

 

[salty]

I've read and heard over the years. That the general rule of thumb is, knock 20% of the manufacturers figures. Is that that case for EVs? For example my X Power is quoted at 240 miles range
My range so far, between charges is about 170 miles. So just over the 20% rule of thumb. Don't get me wrong I'm not complaining, as what will be, will be. And that's plenty for me, anyway.

 

[Tuareg]

The range will depend on the driving style of the driver, same applicable to any ICE. When an ICE is fully filled it might display 500km of range but the will adjust based on the driving style during that tank of fuel. Same with length of service of tyres, suspension, brakes etc.

 

[salty]

The range will depend on the driving style of the driver, same applicable to any ICE. When an ICE is fully filled it might display 500km of range but the will adjust based on the driving style during that tank of fuel. Same with length of service of tyres, suspension, brakes etc.

Agreed. My range quoted in my above post, is with a heavy right foot. (Can't help it)
No doubt my range would be higher, with a lighter, right foot. But where's the fun in that. And, for me personally not what I bought the X Power, for.

 

[NLMGSAN]

I have a light foot and we are speed limited anyway..
The difference is more than 20% on a 86 km trip, of which 65 km is highway. More like 25>30%. 16 kWh/100 now jumps to close to 20. And that isn't even in very cold weather (about -2 Celsius).

 

[Alansurfer]

As far as balancing goes the pack will passive balance at any 0%, higher voltage cells will leach into lower voltage cells when the pack is inactive, active balancing happens towards the very end of the charge cycle most notably once 100% (usable) capacity is reached- this is 4-4.1v per cell, the cells that are lower (3.8-3.9v) will then pull energy from those at 4.1v until all are as close to 4.1v as possible. You will notice if the pack needed balancing as the charge will remain on but not drawing power for 20-40 minutes after an indicated 100% is reached- if it switches off quickly after hitting 100% then the BMS has checked and all cells are balanced.
As for winter range 12 years ev and this year is the worse for me, poor road surface, extra damp cold, much longer range car so not as eco drive driven now. To get 3.5mp kWh on longer motorway trips I cut my speed down to 65mph flat, 60mph up hill, 70 plus down hill coasting in neutral where possible (always have heat and air on for comfort) MG4 62kwh Trophy. I’m seeing 180 miles and 3 miles per kWh just driving at posted speed but I stop for a comfort break before 140 miles usually (top up for 15 minutes) so doesn’t impact any of my longer regular runs.