Working out range from KW per mile

Working out range from KW per mile

Author
Discussion

Quattr04.

Original Poster:

540 posts

4 months

Friday 25th April
quotequote all
Looking to make a switch to a EV company car, the only one on offer is a enyaq 60 with a range of 240 mile

From my own experience of winter driving and looking online, I would expect somewhere between 1.5-2 miles per KWh,

How do I actually work that out? If the car has a 58kwh usable battery?

I want to know my absolute worst case scenario to see if works for me, without recharging, the max I ever do in one trip is 100 miles each way and more likely to be 50-75 on a normal day.

A typical trip to a site I go to very often is 52 miles, 35 of motorway and the rest a road.


And then - if my work pay 9p per mile to charge at home and I have a EV tariff, will the bik savings which is currently £200 a month offset the extra costs of the occasional public charge

Edited by Quattr04. on Friday 25th April 17:13

otolith

60,974 posts

217 months

Friday 25th April
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If you have 58kWh and you can go 1.5 to 2 miles on each of them, you multiply 58 by 1.5 or by 2. Giving you 87 to 116 miles.

1.5-2 miles per kWh sounds extremely low.

Some real world estimates on here.

https://ev-database.org/car/1279/Skoda-Enyaq-iV-60

Mr E

22,415 posts

272 months

Friday 25th April
quotequote all
1.5-2KW per mile is broken with any form of normal driving.
I assumed 2.7 in winter, 3.5 in summer.

Quattr04.

Original Poster:

540 posts

4 months

Friday 25th April
quotequote all
Yes I wanted to over estimate as occasionally I have to carry a set of step ladders on the roof and I would assume that would knock the range by 10-15% in the same way a roof box would

Mr E

22,415 posts

272 months

Friday 25th April
quotequote all
Sensible. Still think it would comfortably be over 2?

kambites

69,277 posts

234 months

Friday 25th April
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Mr E said:
Sensible. Still think it would comfortably be over 2?
I suspect that would depend hugely on speed. A ladder on the roof is pretty terrible for drag (far worse than a smooth roof-box); I suspect efficiency at 80 would be way lower than efficiency at 60. Could you put the ladders in a roof box or some other sort of fairing?

Or just accept that you'll have to charge when carrying ladders.

Edited by kambites on Friday 25th April 18:21

SWoll

20,181 posts

271 months

Friday 25th April
quotequote all
Mr E said:
Sensible. Still think it would comfortably be over 2?
Lots of factors to consider with winter driving including pre-conditioning, weather conditions as well as temp etc.

I don't blame him assuming worst case scenario as at least he's likely to be pleasantly surprised rather than stuck looking for a charger.

smile

Quattr04.

Original Poster:

540 posts

4 months

Friday 25th April
quotequote all
kambites said:
I suspect that would depend hugely on speed. A ladder on the roof is pretty terrible for drag (far worse than a smooth roof-box); I suspect efficiency at 80 would be way lower than efficiency at 60. Could you put the ladders in a roof box or some other sort of fairing?

Or just accept that you'll have to charge when carrying ladders.

Edited by kambites on Friday 25th April 18:21
Yes public charging isn’t really a issue anyway but I would still like to avoid it as the extra costs would eat into the BIK savings each month and I can just imagine a bleak January day where I’ve had a longer trip than usual and just want to get home and can’t find a charger

I’m most likely overthinking it anyway! £200 is a lot of public charging every month

plfrench

3,421 posts

281 months

Friday 25th April
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Any chance of folding the seats and carrying the ladders inside?

OutInTheShed

10,936 posts

39 months

Friday 25th April
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Quattr04. said:
Yes I wanted to over estimate as occasionally I have to carry a set of step ladders on the roof and I would assume that would knock the range by 10-15% in the same way a roof box would
At speed, the drag of a ladder can be monstrous!

Quattr04.

Original Poster:

540 posts

4 months

Friday 25th April
quotequote all
OutInTheShed said:
Quattr04. said:
Yes I wanted to over estimate as occasionally I have to carry a set of step ladders on the roof and I would assume that would knock the range by 10-15% in the same way a roof box would
At speed, the drag of a ladder can be monstrous!
It’s step ladders as apposed to triples but you’re right, I did speak to a engineer st another company who had steps on a mg5 and it did kill it quite badly, but he covered a much bigger area than I do. Talking 250 miles a day easily where as I do about 60-120

Discombobulate

5,481 posts

199 months

Friday 25th April
quotequote all
I drive an iPace (not very efficient) fast on motorways and haven’t gone below 2.5 miles /kWh over the last 5 (colder) months and 5000 miles. No ladders though …

quinny100

990 posts

199 months

Friday 25th April
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We use an Enyaq 80 as a pool service vehicle. Long term average is 3.1 miles per kWh, there’s about 30 people who drive it.

Sustained higher motorway speeds will push it in to high 2’s. On a 200 mile trip I reckon you’d do it quicker cruising at 65mph than trying to run af 80mph and having to charge.

It’s an early one without a heat pump, so the heater has a significant impact when the ambient temperature is low. I did about a 140 mile round trip with a bit of waiting around in the depths of winter and got back with a couple of percent.

It carries a bit of weight in tools, but we use telesteps rather than carrying stuff on the roof. It’s a decent enough work tool and a good family car - plenty of room, good comfort and the ride is good. The infotainment system is annoying although once you’ve paired up CarPlay or AA that’s less of an issue. The lane departure warning is way too intrusive and needs to be turned off every time - if it was my personal car I’d pay to get it coded permanently off. Travel Assist adaptive cruise and lane keeping system is excellent - it’s particularly smooth in very stop start traffic on congested motorways and easily matches Mercedes Distronic which is the best I’d used, and it’s way better than Tesla Autopilot. It’s all just a bit white goods - there’s no rapid acceleration and it’s no fun to push on. It’s on its third charge port cover latch - they’ve carried over the hardware from a normal fuel door but it’s used far more often.

We have an MG 5 LR as the other EV pool car and with a 64kWh battery we find people are far more reluctant to use it for anything over 100 miles because people unfamiliar with EV’s seem to get twitchy below 20% battery when in reality running into low single figures isn’t really a problem.

The 80 charges reasonably quickly so an extra 50 miles on a motorway rapid charger is easily achieved in about 10 minutes but cost about £8-£12. Finding a charger isn’t really in issue these days if you’re not too concerned about the cost. That’s OK if you only need it infrequently but it would be a bit annoying if it was regular. We provide an Allstar card for public charging or people can expense if they charge at home.

Edited by quinny100 on Friday 25th April 22:00

SWoll

20,181 posts

271 months

Saturday 26th April
quotequote all
plfrench said:
Any chance of folding the seats and carrying the ladders inside?
Or a set of these in the boot?


ZesPak

25,362 posts

209 months

Monday 5th May
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Even having the ladder in some sort of box/cover would be a massive improvement instead of having every individual step act as an air brake.

My FiL used to have a ladder with him on his camper and always had it covered that way, I think mainly to protect the ladder from the elements, not have it snag on tree branches and such and avoid pile up of dirt, but it could make a huge difference in aero and worth the try for minimal outlay.

Quattr04.

Original Poster:

540 posts

4 months

Monday 5th May
quotequote all
ZesPak said:
Even having the ladder in some sort of box/cover would be a massive improvement instead of having every individual step act as an air brake.

My FiL used to have a ladder with him on his camper and always had it covered that way, I think mainly to protect the ladder from the elements, not have it snag on tree branches and such and avoid pile up of dirt, but it could make a huge difference in aero and worth the try for minimal outlay.
That’s intresting and is something I could look into. Would stop the fibreglass from dulling in the sun too

OutInTheShed

10,936 posts

39 months

Monday 5th May
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From towing sailing dinghies, I think covers have to be drum tight to avoid adding drag.

The telescopic ladder looks like a good idea.

drgoatboy

1,850 posts

220 months

Monday 5th May
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In my enyaq vrs I think I would assume 2.5 winter and 3.5 summer from my experience so far.
Driven like a saint up to 3 and 4.
Driven like a nutter 2-3.

So 2.5 x 58 = 145 miles
3.5 x 58 = 203 miles
A 60 should be much more efficient (and are from what I have read) but as you say laddes will hit the range.

I ran with a towbar mounted bike rack with 4 bikes on today and I got 3.1m where I think I would have normally got closer to 3.5+ so 10-15% hit.

Quattr04.

Original Poster:

540 posts

4 months

Tuesday 6th May
quotequote all
Thanks guys

I’ve actually looked today and the scenic e tech is on rhe list now and the range on those is 370 miles which is think will be much better suited to me

Back2theFuji

280 posts

36 months

Tuesday 6th May
quotequote all
Quattr04. said:
Thanks guys

I’ve actually looked today and the scenic e tech is on rhe list now and the range on those is 370 miles which is think will be much better suited to me
Well that's a significant bump in range. Both are great cars, obviously the Scenic has a smaller boot, but sounds like range is more important here👍