i3 charging with regular 120 outlet Jul 18, 2018 20:26:57 GMT -5
Post by afadeev on Jul 18, 2018 20:26:57 GMT -5
I swear I saw a 12 - 14 hour L1 charging time on the official BMW web site at one point while researching the car. It now states "3 - 4 miles per hour of charging". I also remember other web sites quoting similar charge time (see below). I clearly remember the BMW sales people saying 12 - 14 hours as well, and maybe I saw it on some printed brochure. Maybe I'm nuts, or saw what I wanted to see. Still, I think I'm not getting a good charge time.
3-4 miles per hour, assuming ~4 kWh consumption, would imply ~0.75 to 1 kW charge per hour. BMW NA claims 1.2 kW for L1 charging, so we are close.
With a 33 kWh battery, only ~27.2 kWh are usable, so your full L1 charge time will be 27.2 / 1.2 == 22.67 hours ;-).
For the old 22 kWh battery, ~18.2 kWh were usable, so you full L1 charge time would be ... 15.17 hours!
Someone may find above times acceptable (and yes, you will never be charging from 0%, so in real life, it will be a little shorter), but that won't be me !
I used mine exactly once ... on the first i3 we had a few years ago.
It worked, slowly. I never measured how slowly, since the L2 charger was delivered the next day, and I installed it within 45 mins of unpacking.
On the 2nd i3, the L1 charger is still sitting in the plastic bag, and will likely go back to BMW during lease return, unopened.
I'm L2/L3 charing 100% of the time !
But if I'm going to call in an electrician to check out my circuit breakers on my house, I might as well have the L2 charger installed. It seems I have a 240v circuit, but the outlet is old, and would need changing. I'd rather not spend money on the L2 charger + electrician and waste all that gasoline savings for a year if I don't have to.
Just because outlet is "old", doesn't mean that it needs changing. What exactly is old about it?
What plug does our perspective L2 charger require?
This one says 13 - 16 hours (ya, I know, third party web site, but they didn't pull the numbers out of the air):
That may very well be true ... for the old 22 kWh battery!