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      04-11-2018, 10:43 PM   #1
perryy
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Level 2 Charging Time

I've had the i3 two weeks now and wanted to check out the Rex operation. So, i didn't charge it for a few days so that the Rex came on. I drove it to the office and back on the Rex and everything seems fine. In the meantime, I've received my TurboCord, had a 240 v. outlet installed, and am ready to check out Level 2 charging. I was expecting a charging time of 4 hours or so, but, instead, it's saying 9.5 hours to fully charge. I found the charge settings and it was set for maximum charge rate. Can anyone make sense of this?
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      04-12-2018, 10:25 AM   #2
tonorc
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What is the amperage of your charger? It needs to be 30 amps to charge in 4 hours. Some level 2 home chargers are 16 amp. Also check the charge level on your home charger if it is programmable.
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      04-12-2018, 11:06 PM   #3
perryy
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OK, that is helpful. I checked the specs on the TurboCord, and it delivers 16 A. to the car. At 240 V. that's 3.8 kW. If I have about 30 kWh to charge, that would take about 8 hours.
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      04-13-2018, 09:32 AM   #4
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Quote:
Originally Posted by perryy View Post
OK, that is helpful. I checked the specs on the TurboCord, and it delivers 16 A. to the car. At 240 V. that's 3.8 kW. If I have about 30 kWh to charge, that would take about 8 hours.
Return the 16Amp charger, if you can, and buy a proper 30+A L2 charger!

a
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      04-13-2018, 10:45 AM   #5
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L1 charger for the 2017+ I3 is 24-28 hours from 0%. Level 1.5 (as I call it) which is the 16A 240V turbocord and similar, are 8.5-10 hours. Level 2 30A is 4-4.5 hours. 30A is the max the I3 will charge at. If it could accept full level 2 at 40A it would charged in 2.75-3 hours.
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      04-16-2018, 08:43 PM   #6
perryy
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So, this has been informative. I kind of assumed that a charger that BMW would put it's name on would be the latest thing. But, you've let me know that I could get a 30 A. charger. Now, for any use at home, the 16 A. cord is adequate. It can recharge from zero overnight. So, the only reason I can think of for returning the BMW TurboCord and getting a 30 A. would be for when I'm traveling and find a 30 A. outlet rather than a L2 station and need to charge on the road. Anyone disagree?
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      04-19-2018, 08:24 AM   #7
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Level 1.5, I like that for the Turbo Cord 20a option. I like many was misled on how quick the Turbo Cord charges. Its fine, if I get another "e" BMW I will probably put in a full L2 30a socket, no big deal I know a lot of electricians. If I didnt have a Rex it maybe be a different story.

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Originally Posted by scott135i View Post
L1 charger for the 2017+ I3 is 24-28 hours from 0%. Level 1.5 (as I call it) which is the 16A 240V turbocord and similar, are 8.5-10 hours. Level 2 30A is 4-4.5 hours. 30A is the max the I3 will charge at. If it could accept full level 2 at 40A it would charged in 2.75-3 hours.
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      04-19-2018, 09:04 AM   #8
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Good points above. Also it's more costs to run a 40 or 50 amp circuit for the Level 2 vs 20 amp for level 1.5.


And the plugs are different:

NEMA 6-20 for the level 1.5
NEMA 14-50 for the level 2 (at least the 40amp level 2 I have). The circuit and breaker need to have 20% more capacity than the max the EVSE will pull by almost all electrical code in the USA and for good reason.
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      07-09-2018, 11:23 PM   #9
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I have a Clipper Creek 24A charger in transit now. With a 30A+ charger you'll need a 40 or 50A line to be aligned with code. For wire runs over 15' that means 8AWG Romex wire, which many don't have on typical "dryer" receptacles.
30A line/plug/breaker is fine for a 24A charger, which will easily charge my 2018's 30kw/hr (usable) battery from empty to full overnight. And it will very rarely be empty, since my commute is under 50 miles/day.
It's not a lot cheaper to go with 24 vs 30 but something to think about.
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