Warmer weather, better range. - Renault Z.E. Forum
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post #1 of 11 (permalink) Old 03-16-2014, 12:07 PM Thread Starter
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Warmer weather, better range.

Did a 55 mile outing today and returned with a range remaining of 36 miles, so a total implied range of 91.

A few weeks ago with temperatures of about 6-8C I was getting about 78 on similar trips, today it was 15-16C.

So plus 8-10C > ca 15% better range. In fact, I think I would have got better than 91 as the distance covered plus range number kept on going up (I'd done a reset at the beginning of the journey). May go out and do a few more miles on the same charge just to see if I can nudge up towards 100.

Not remotely scientific but very encouraging - anyone have any observations, or similar/contrasting experiences to share?
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post #2 of 11 (permalink) Old 03-16-2014, 12:27 PM
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RE: Warmer weather, better range.

Just go on the SOC meter. The range remaining is not too bad but is always pessimistic.
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post #3 of 11 (permalink) Old 03-16-2014, 12:52 PM Thread Starter
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RE: Warmer weather, better range.

Yes - the SOC seems to imply better as it's nearer to 1/2 than 3/8.
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post #4 of 11 (permalink) Old 03-16-2014, 01:18 PM
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RE: Warmer weather, better range.

I mentally divide each octal in to 3 parts (it is easier to visualise 3 parts than anything smaller).

So that makes 24 subdivisions.

There are also an extra 1.5 subdivisions that do not appear above the 8th octal marking (at least, on my car, after extensive mileage measurements and calculations).

So if it is nearer to 1/2 than 3/8ths, I'd call that 11 'units' out of 25.5, so you have used 43%, meaning a total extrapolated range of 55/0.57 = 96.5 miles.
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post #5 of 11 (permalink) Old 03-16-2014, 02:00 PM Thread Starter
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RE: Warmer weather, better range.

Thanks - I'd never divided the scale as rigorously as that but I had noticed the extra bit above the supposed top of the scale making all my early SOC-based calculations a bit too optimistic, which is why I then started concentrating on the range figure readout.

Back to SOC, this time using the 25.5 sub-divisions approach, I think.
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post #6 of 11 (permalink) Old 03-16-2014, 02:19 PM
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RE: Warmer weather, better range.

Quote:
Originally Posted by donald
Just go on the SOC meter. The range remaining is not too bad but is always pessimistic.
When you say SOC do you refer to the large 'fuel gauge' on the left of the display?
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post #7 of 11 (permalink) Old 03-16-2014, 02:21 PM
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RE: Warmer weather, better range.

Yes, 'state of charge'.
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post #8 of 11 (permalink) Old 03-16-2014, 04:18 PM
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RE: Warmer weather, better range.

90-odd miles to the charge? I'm jealous. You got to use your car, my car went nowhere in the glorious 18 degrees we had here this afternoon and I had to spend my time cutting my neighbour's lawn! Ugh!

Over the past year I have logged my miles/charge regularly.

With my white car I covered 850 miles in 5 months.
First half average was 77
Second half average was 90
Time off the road 3 months

With my blue car I have covered 3500 miles in 8 months.
July average 101
August average 102
September average 97
October average 88
November average 72
December/January average 67
February/March average 78

Each figure is based on 8 charges

Best figure 107
Worst figure 43

Each figure is based on actual miles gone on 3/4 charge plus predicted range for last 1/4
The SOC meter is very trustworthy
Compared with the Leaf the computer prediction is also surprisingly accurate - only caught out by change of driving style
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post #9 of 11 (permalink) Old 03-16-2014, 04:47 PM Thread Starter
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RE: Warmer weather, better range.

Thanks for the numbers - on the basis of those and my experience today, I think my EV horizons should open up quite a bit as we go into the summer.

It's not just a car - it's a way of life![hr]
PS - the other thing that's surprised me is the number of miles I'm racking up. I'm on a 6,000 miles per year rental but last month I did 541 and I can see that going higher in the summer. May have to step up to a 9,000 pa rental. I still have an ICE car as well, but the Fluence is substituting to a far greater extent than I expected.
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post #10 of 11 (permalink) Old 03-16-2014, 05:54 PM
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RE: Warmer weather, better range.

Crunch the numbers - there is no reason to change your mileage band. I calculated this when I first bought the Twizy, even if you go over the stated amount, the amount you have to pay for any overuse isn't a penalty rate and will be more cost effective than paying the higher monthly fee.

What if you don't make the planned usage? There's no rebate!
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