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[Specter]

So it's July / August and the temps are in the 90s.
Lets say your Energica bike gets 100 miles per charge.

So it's December and the temps are in the 40's or maybe a bit lower.
About how much range loss is to be expected from the battery due to the cold?

Thank  you
Aaron

[Apollo]

I am not sure about the Energica's, but I rode home with my new Lightning and it was 37 degrees outside.  Also, some kids stole my gloves.  Grrrrr.....
The bike seemed to run fine, but I was so cold my Range was to the nearest hotel for the night.  When it gets that cold, I don't ride very far.

[Pard]

So it's July / August and the temps are in the 90s.
Lets say your Energica bike gets 100 miles per charge.

So it's December and the temps are in the 40's or maybe a bit lower.
About how much range loss is to be expected from the battery due to the cold?

Thank  you
Aaron

Riding near 30F around here I lose around 15% of the range.

[princec]

A good rule of thumb I worked out that matches most batteries is every 1 degree C under 20, you lose about 1% of its capacity.

Cas

[Specter]

Thank you Pard and Princec

So at highway speeds ..well, Florida highway speeds ... in the winter, I probably should expect 80 miles or so on a charge.  I'll have to keep this in mind when I plan trips.

I wonder if one had a battery heater, if the power used to heat the battery to say 35C would be less than the power you get out of the extra range, ie would it be worth it?

Aaron

[DonTom]

A good rule of thumb I worked out that matches most batteries is every 1 degree C under 20, you lose about 1% of its capacity.

Cas

Which is 1.8° F.

Those used to °F. should round off to two 2 degrees to make it simple.   

IOW, 1% of loss of range for every 2 degrees F. temperature drop when below 68°F.

-Don-  Reno, NV

[Pard]

I tend to ride more conservatively in the cold, since the grip is down, so I end up getting better than 80 miles per full charge. 

[jotjotde]

A good rule of thumb I worked out that matches most batteries is every 1 degree C under 20, you lose about 1% of its capacity.

Cas

I can support that! Rode the last two days at 9-10 °C and have about 10 % less range.

[Specter]

Well, up here, or maybe down  here, depending on your viewpoint   Traffic generally is running about 80 MPH.  75 to 80.  If traffic is heavy, I try to stay with the crowd, I don't want to be slowing people down, and it'd be absolutely stupid to start playing games and cuttin it up real bad  if traffic is that heavy.  So with that being said, 80 is probably a safe number to work around for expected miles.

If we  were running in the 60's then yes, 100 is not a problem at all, or the middle of summer when it's 95 out.  One trip I make a few times a month, is about 85  miles baseline riding, and give or take 10 to 20 more depending on how many extra visits I do.  This lets me know if I should do a trickle up or not when I am sitting for an hour or two chatting and having a beer.  Those extra 15 miles of range the dryer outlet put in might make all the difference in the world! 

Thanks everyone.
Aaron