nikalex
Posts: 32
Joined: Mon Apr 20, 2015 11:03 am
Location: Vancouver, BC, Canada

My winter driving range has dropped a lot!

Mon Jan 16, 2017 3:03 pm

My Guess-o-meter usually only shows between 80 and 85 kms RR these days (50 - 53 miles RR) first thing in the morning after a full 16 bar charge. My drive is 60% highway and 40% secondary 40mph roads.
It has been cold here lately (at least cold by Vancouver standards ) at below zero °C (-5°C to -10°C which is 23°F - 14°F)- sorry in advance to those folks in the real cold!
This RR is cutting it way too close for my commute.
I am preheating the car in the Morning using my remote while it is still plugged in. But I am also using the heater and heated seats during the commute.

To make matters worse when I did an odometer check my odometer and speedometer is reading 3 - 4% high using my original OEM size Dunlop tires.
I assume this is also penalizing me in terms of actual range.

Is anyone else seeing a drop in range like this?

My I-MiEV is a 2014 SE edition and I am running winter tires as well.
Bridgestone Blizzak WS60 tires. My rear tires are a little tiny bit smaller than OEM, fronts are identical.

I can not plug in at my place of work.
I could ask some neighbouring businesses though.

Cheers,
Roman
2014 i-MiEV

Don
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Re: My winter driving range has dropped a lot!

Mon Jan 16, 2017 3:30 pm

I would bet that driving in snow with snow tires is costing you a good bit of range . . . . but, if I use the heater much, my RR will drop from it's normal reading of 75 miles or so to around 50, so no doubt the heater is responsible for a good bit of your loss

If you intend to keep the car long term and it's your principal vehicle, a diesel heater upgrade would probably be a wise move

Don
2012 iMiEV SE Premium, White
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nikalex
Posts: 32
Joined: Mon Apr 20, 2015 11:03 am
Location: Vancouver, BC, Canada

Re: My winter driving range has dropped a lot!

Mon Jan 16, 2017 4:47 pm

Thanks a lot for this info.
Makes me feel a bit better that there is nothing really wrong with my little I-MiEV.

The only thing wrong is that I like the heat on in the winter!

My summer range is much better - about 50% more than my winter range roughly. I go from an average of 80kms RR to about 120kms RR.

Still not stellar but much better.

I love the I-MiEV and wouldn't trade it. Have to make it work. Don't know much about the little diesel heaters. Must be similar to what I had in our previous sailboat. It had an Espar diesel heater with exhaust coming out through the deck.
2014 i-MiEV

fjpod
Posts: 529
Joined: Tue Apr 17, 2012 2:31 am
Location: NYC

Re: My winter driving range has dropped a lot!

Tue Jan 17, 2017 9:14 am

I can only give you my own personal estimates based on my 2012 imiev that I have owned for 4 years or so.

In cold weather, I lose at least 10% of range. No snow, no heat, no snow tires,... just the same driving. The batteries just lose range, which comes back in the spring.

If I use the heat or defroster, the loss is much greater. At least another 25%, and sometimes more if I get stuck in traffic.

magicnote
Posts: 12
Joined: Sun Feb 05, 2012 10:04 am
Location: Seattle

Re: My winter driving range has dropped a lot!

Fri Jan 20, 2017 12:54 pm

I have noticed a huge drop in range in the cold weather as well. We are just coming off a cold spell in Seattle, and the battery was barely making it though the day when I had the heat going. In the summer months, we rarely went below 75% charge at the end of the day for our typical routine. So that's a pretty big change during cold weather - and this was the coldest weather that our i-Miev has ever experienced. Our car is 5 years old now, so there might be some battery degradation as well. It may be time to upgrade to a car with a bigger battery. I wish there was an upgraded i-Miev in the works.
-Magicnote

2012 i-Miev SE, since 29Jan2012

Don
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Location: Biloxi MS

Re: My winter driving range has dropped a lot!

Fri Jan 20, 2017 1:10 pm

If you have no summer range problems, then maybe you will want to look into a better way to heat the car, rather than upgrading to a significantly more expensive car? A diesel heater install might solve all your winter problems

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE Premium, Raspberry Metallic
2012 iMiEV SE, White
2017 Chevy Volt Premier
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jray3
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Re: My winter driving range has dropped a lot!

Fri Jan 20, 2017 4:41 pm

magicnote wrote:I have noticed a huge drop in range in the cold weather as well.

Hi Magicnote, it looks like you're realizing about a 25% range loss with use of the heater. As another Seattleite, I'd say that's right on the money. If you have the heated driver's seat, that can offset a lot of heater use, and all it takes is lukewarm or even air-conditioned flow across the windshield to keep it fog-free. Heating these cars electrically is a great luxury with the remote (pre-departure), but keeping one nice n toasty while driving is a recipe for 40 miles of practical range.
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blackheart
Posts: 143
Joined: Sun Mar 13, 2016 9:41 am
Location: Portland Or

Re: My winter driving range has dropped a lot!

Mon Jan 23, 2017 8:04 am

magicnote wrote:I wish there was an upgraded i-Miev in the works.


I bought my 2012 as a 4 year old lease return with 1170 miles on it. I was banking on someone making a replacement battery pack for it someday ;-)

I have been using a 12v blanket to keep the heater use to a minimum. I got it for $7 on clearance. It doesn't get really hot (like the seat seams to at times) but it does well enough to take the edge off - especially since we have had one of the coldest winters here in a long time.
I did have to break out the 4x4 Dino-monster for about a week due to the snow and ice we had. Today tho, it was a balmy 34°F on my drive in and I decided to not use my blanket. Pre-heated the care on the 120v plug (never gets really warm using that plug - I should have used my 220v...). Sure enough, I kept the heat on and saw my RR going down.
Normally, when I get to work when it has been colder like this, I would have between 42 and 45 miles left on the meter. Today was 36. I am tossing that up to 1) cold weather, 2) insufficient pre-heat before unplugging, and 3) not using my 12v blanket and using my heater more.

Still, plenty of range to get home - but no real wiggle room. My commute home is mostly uphill so my power use on my commute is more like 35% going to work and 65% going home.
Long term - I am going to be looking into the diesel heater - but short term, try the 12v blanket - it helps - ALOT!!
'Is treading water actually swimming - or just prolonged drowning"

-2012 MItsubishi I-Miev - BlackJack
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PV1
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Re: My winter driving range has dropped a lot!

Mon Jan 23, 2017 8:41 am

The cold itself doesn't have any major affects on range until you get below 10 F, causing a noticeable drop. But below 0 F is when range really starts to fall off, even without heat (45-50 miles max). Running the heat will easily take another 10 miles off of that. The heated seat alone makes quite a difference, as do insulated driving gloves.

It's been rather easy to make the comparison this winter, as temperatures would dive into single digits for 3 days at a time, then rocket up to the mid-50s F on day 4 :roll: . I bailed on January 8 and took the C-Max to Pittsburgh instead due to the cold, but rode the eBike this weekend when it was 65 F.

I agree with others, if winter range is tight due to heating, a fuel heater would be a major game changer.
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magicnote
Posts: 12
Joined: Sun Feb 05, 2012 10:04 am
Location: Seattle

Re: My winter driving range has dropped a lot!

Mon Jan 23, 2017 3:12 pm

Don, I'm hoping the upgrade isn't that expensive. We seem to be on the cusp of 200 mile range EVs that are quite affordable. The Tesla Model 3 looks like a fantastic car for the money if Elon Musk can keep it to the price that he promised. We have had a great experience with our i-Miev and will keep it around as a workhorse. Ours has always had two car seats in the back that are a pain to get in and out, so I never really got to take advantage of the hauling space with the seats folded down. If our new car becomes the family car, then we can finally take advantage of all the cargo space in the i-Miev.

jray3, I haven't been tracking the range closely, but it feels like more than a 25% drop. But we also have to run the heat a lot more than most since we have two young kids in the back seat. That heated driver's seat is all I use when it's just me in the car, but it won't do anything for them in the back.

blackheart, I like the idea of the heated blanket, but we would need at least three blankets going when my wife and kids are in the car.

I'm also not sure how much an external heater would help with our situation. We would only be able to use it in the morning and the car is kept in a garage overnight. The garage isn't heated, but it's mostly below-grade and the entrance is shielded from the wind. I wasn't checking the morning temperature that closely, but I don't think it went below 50 even on the cold days. The big drain for us is heating the car after it has been sitting outside in a parking lot or on the street.

Thanks for all the suggestions!
-Magicnote

2012 i-Miev SE, since 29Jan2012

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