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by alohart
Sat Nov 29, 2014 5:12 pm
Forum: General / Main i3 Owners Forum
Topic: How do you charge your i3
Replies: 26
Views: 10617

Re: How do you charge your i3

Domestic service is more likely 100 amps @ 240 volts, not 208 volts. The service in our apartment is 120Y/208 v. which is common in commercial establishments and in many apartments here in Honolulu. As you say, free-standing houses typically have 120/240 v. split phase power. A downside to 120Y/208...
by alohart
Sat Nov 29, 2014 5:01 pm
Forum: General / Main i3 Owners Forum
Topic: Driver-Side Door Will Not Open
Replies: 10
Views: 8474

Re: Driver-Side Door Will Not Open

It's under warranty. Take it to your BMW dealer for a repair. If it won't open now, it likely won't open at some time in the future, even if you are able to eventually open it now. Something's broken that needs to be fixed.
by alohart
Sat Nov 29, 2014 2:39 pm
Forum: General / Main i3 Owners Forum
Topic: How do you charge your i3
Replies: 26
Views: 10617

Re: How do you charge your i3

Our apartment has 100 amp service. Please correct me if I'm wrong, but I believe that the 100 amp rating is at 120 v., so it would be 50 amps at 208/240 v. I charged our i-MiEV using a small L2 EVSE (208 v. at 13 amps). I have been charging our i3 with its L1 EVSE which has been sufficient so far, b...
by alohart
Sat Nov 29, 2014 2:21 pm
Forum: Technical BMW i3 Discussions
Topic: Where does the headlight power come from?
Replies: 42
Views: 19977

Re: Where does the headlight power come from?

The i3 doesn`t work this way. The DC-DC is working continuously, delivering all the 12V power simulaneously as needed and leaving very little for the 12V battery. That is surprising. You provide good evidence to support your theory. Conclusive proof would be provided by monitoring the voltage of th...
by alohart
Sat Nov 29, 2014 2:10 pm
Forum: General / Main i3 Owners Forum
Topic: How to lock doors from tailgate with comfort access?
Replies: 2
Views: 2008

Re: How to lock doors from tailgate with comfort access?

I haven't found a way to lock the doors from the tailgate other than pulling out my fob and pressing the lock button. However, if one locks the doors by touching the lock area on a door handle, then unlocks the tailgate, and then shuts the tailgate, the doors and tailgate will be locked. You can ver...
by alohart
Sat Nov 29, 2014 12:04 pm
Forum: Technical BMW i3 Discussions
Topic: Where does the headlight power come from?
Replies: 42
Views: 19977

Re: Where does the headlight power come from?

The converter is far more complicated than "being turned on and off as necessary" or operating like an ICE car with a simple regulator circuit. There's a bunch of SW running in a controller in there, it'll be far more complex than you've described. Of course, but since none of us has the source cod...
by alohart
Sat Nov 29, 2014 2:34 am
Forum: Technical BMW i3 Discussions
Topic: Where does the headlight power come from?
Replies: 42
Views: 19977

Re: Where does the headlight power come from?

I think however that far more than 90% of 12V power comes directly from the DC-DC without touching the 12V battery. I would be surprised if this is true. Without a wiring diagram, I'm guessing that the 12 v. battery is always connected to the 12 v. circuit as in all cars. The DC-DC converter serves...
by alohart
Sat Nov 29, 2014 2:17 am
Forum: Technical BMW i3 Discussions
Topic: Where does the headlight power come from?
Replies: 42
Views: 19977

Re: Where does the headlight power come from?

The converter requires nothing on the low voltage side to operate. If true, then the connection from high voltage circuit through the DC-DC converter to the 12 v. circuit must be always exist which I doubt. If it works like my Honda hybrid, a 12 v. relay closes when the Start/Stop button is pressed...
by alohart
Fri Nov 28, 2014 7:27 pm
Forum: Technical BMW i3 Discussions
Topic: Where does the headlight power come from?
Replies: 42
Views: 19977

Re: Where does the headlight power come from?

The 12V battery is tiny in an i3, only 20 Ah AFAIK, much smaller than in an ICE. It would in principle be possible to eliminate the 12V battery altogether, but this is needed for some tasks like backup for emergency lighting in case of a 360V failure. In practice, it's probably not possible to elim...
by alohart
Thu Nov 27, 2014 2:03 pm
Forum: General / Main i3 Owners Forum
Topic: Pathetic charging of i3 compared to B Class Electric
Replies: 50
Views: 18661

Re: Pathetic charging of i3 compared to B Class Electric

I hope BMW will give us an option soon in the car and the app so we can do something like "charge to 80%", "only charge during these hours" and maybe more than one range of allowed charging times. Yes!! It will get old walking 200 feet and down 2 floors to reach our parking space so that I can begi...

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