My car battery is only 40 miles away - 2018 Honda Clarity Forum
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post #1 of 16 (permalink) Old 10-28-2020, 02:02 AM Thread Starter
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My car battery is only 40 miles away

My clarity trip in 2018 is already 46,000 miles. I now find that his battery mileage is only 40 miles. Is this normal? Do I need to go to Honda Service to test whether there is a problem with the battery.
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post #2 of 16 (permalink) Old 10-28-2020, 12:34 PM
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Mine went from 50 to 40 when outside temp dropped from 70-80 to 40-50.

From what I understand that is normal for lithium batteries?
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post #3 of 16 (permalink) Old 10-28-2020, 03:06 PM
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LiOn batteries are temperature sensitive. When the temps drop below about 50F you can expect to see up to a 20% drop in actual EV range.
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post #4 of 16 (permalink) Old 10-31-2020, 11:16 AM
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I am still seeing 50+ miles per charge in the hot desert southwest complete with wildfires all over the place.
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post #5 of 16 (permalink) Old 10-31-2020, 01:07 PM
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Quote:
Originally Posted by 4sallypat View Post
I am still seeing 50+ miles per charge in the hot desert southwest complete with wildfires all over the place.
My brand new 2020 has less than 1,000 miles on it but each time I charge it up the calculated range increases. I'm up to 57 miles now. Mostly driving around town.
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post #6 of 16 (permalink) Old 10-31-2020, 03:43 PM
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We are now getting into freezing nights and 40s day high, wonder if anyone knows how the distance play out when we hit 10 below nights and 10 high day in January upstate NY?
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post #7 of 16 (permalink) Old 10-31-2020, 05:39 PM
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Last winter was my first with my 2018 Touring and temps of 10 below at night and 10 above during the day would leave me with may 32 EV miles on the Guess-O-Meter.
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post #8 of 16 (permalink) Old 10-31-2020, 07:51 PM
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Thanks, that is not too bad I was afraid it kept declining to a very low figure
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post #9 of 16 (permalink) Old 11-01-2020, 04:23 PM
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For those who don't always charge to full but still want to monitor how their EV range is doing, there is a fairly quick calculation you can do to estimate how many EV miles you would have if you were fully charged. And even if you will be fully charging it allows you to get a pretty accurate estimate of what your EV range will be prior to charging without having to wait until your charging is complete. The calculation is:

90 (SOC-10) X Current EV

You can get the SOC using the HondaLink app even if you aren't using it for scheduled charging.

For example I recently arrived home with the HondaLink app showing 42 miles remaining and SOC of 79. So the calculation was:

90 (79-10) x 42 = 55 miles (rounded to nearest mile)

After I charged to full my EV range was 55 miles just as predicted. It is usually either exact or very close. The only time it doesn't work is if your EV range is 0 or close to it.

I do the calculation in a spreadsheet but you can do it just as easily with a calculator. When using a calculator it helps if you do the SOC - 10 in your head, then the rest is just a few button presses. Using the same example this is what you enter into the calculator:

90 69 x 42 = 55

If you do it often enough it's easy to remember how to do it.
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post #10 of 16 (permalink) Old 11-04-2020, 02:00 PM
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Just an update. At less than 700 miles on the speedometer, after charging my new Clarity last night I had a big grin on my face this morning as the display projected a range of 61 miles in EV mode.
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