KrisM
Posts: 58
Joined: Sat Jul 27, 2019 5:40 am
Location: Belgium, East Flanders

Charging time household plug

Tue Aug 13, 2019 5:37 am

Hi al,

I was talking with the BMW salesman about a wallcharger I would like to buy and He claims that the 94Ah - Rex that I ordered should charge within 4 hours from 0 tot 100% with a normal 220V household plug....

Is this true ?? if so I do not need a special wallcharger that I was planning to buy.

KrisM
Posts: 58
Joined: Sat Jul 27, 2019 5:40 am
Location: Belgium, East Flanders

Re: Charging time household plug

Tue Aug 13, 2019 5:45 am

I was forgot to say that the salesman said "the car comes with a yellow charger" , I do not now what that means and if or what the difference in charger colors is. Al so want to mention that the car have 4U6 Fastcharging AC and 4U7 fastcharging DC options.

vreihen
Posts: 303
Joined: Tue Apr 30, 2019 4:55 pm
Location: Orange County, NY (FN21vm)

Re: Charging time household plug

Tue Aug 13, 2019 9:12 am

The options are the charger electronics built into the car, not what cord(s) they include.

I can't help with what cords they provide in Europe, or what your standard outlet amperage is. Our mains power on this side of the world is a wimpy 120V, and charge times are 12-16 hours on a wall outlet. I know that we can get 4-6 hours on a 230V EVSE, but they only include the 120V cord with our cars.....
2015 BMW i3 BEV, Giga World, Tech and Driving Assistant packages, 15K miles

KrisM
Posts: 58
Joined: Sat Jul 27, 2019 5:40 am
Location: Belgium, East Flanders

Re: Charging time household plug

Tue Aug 13, 2019 11:29 am

Thanks for the reply !

We have 240V and the socket that is provided by me is wired with 10mm² on a 40A / 30mA earthleak with a 32Amp fuse.

alohart
Posts: 2164
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Charging time household plug

Tue Aug 13, 2019 1:17 pm

KrisM wrote:
Tue Aug 13, 2019 5:37 am
I was talking with the BMW salesman about a wallcharger I would like to buy and He claims that the 94Ah - Rex that I ordered should charge within 4 hours from 0 tot 100% with a normal 220V household plug....

Is this true ?? if so I do not need a special wallcharger that I was planning to buy.
No production EV can be plugged into an electrical outlet with a simple cable. There must be an electronic device between the outlet and the EV that can communicate with the EV to determine the charging power that will be provided and to prevent electrocution. In North America, that device is called EVSE, electric vehicle supply equipment. BMW includes a rather low-power EVSE with every i3. For increased charging power, a more powerful EVSE must be used, frequently mounted on a wall.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

jadnashuanh
Posts: 5106
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Charging time household plug

Tue Aug 13, 2019 2:20 pm

FWIW, the acv charging on an EV depends on a few factors:
- how big the power supply in the car is
- the applied inlet voltage
- the maximum capacity of the EVSE

The EVSE is a fancy, smart, on/off switch. Part of its function is to announce to the vehicle how much current it can provide. The car's part in this is to never try to use more power than the EVSE announces it has. The EVSE also provides ground fault protection, and the car provides a signal that tells the EVSE that it's safe to turn the power on.

Belgium, I think, is one of few places where they provide the i3 with a 3-phase changing capability which could charge the car faster than in most other places. All of the other places I'm aware of utilize a single phase input, whether that's 120 or 240 vac. Well, I heard rumblings about Australia and maybe NZ as well.

In the states, the fastest charge accepted (acv) in the i3 is 7400W, or about 30A at our nominal 240vac generally available. power = volts * amps. Lower the voltage, with the same amps, and less power is available. The maximum amps is the overriding factor as that's the factor announced by the EVSE and what the circuits in the i3 can handle.

At 94Kw in four hours, that's a bit less than 24Kw/hour (note, there is some loss in converting acv to dcv) so, at 24Kw/220v = 109A...the i3 certainly cannot accept anywhere near 109A, nor, are most homes wired up to provide that. Other people have indicated that those that can use a 3-phase input can charge at higher rate (in the range of 10,000 versus 7400), but nowhere near 24,000 unless you're talking about a DC input which you almost certainly won't have in your home unless you want to spend $20K or so and upgrade your power in to industrial standards.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
Soon (hopefully!) A 2021 X5 45e will replace the above

KrisM
Posts: 58
Joined: Sat Jul 27, 2019 5:40 am
Location: Belgium, East Flanders

Re: Charging time household plug

Tue Aug 13, 2019 9:35 pm

Thanks all for the information,

I'm going to wait for the car next week to arrive and then when it is "empty" I will see how long it takes to charge on my provided household connection with the BMW "yellow" charger (what ever that means :) ) This connection I'm using is normal in use for a electric stove or cooking but then on 6mm² wire instead of mine 10mm² wire.

I have in my home 3 fase 240V but it is not connected to the fusebox since we need to pay extra ( a lot ) if we want that and had no need for it before, now I have only 240V monofase. On my lathe on the other hand I have a device, I do not know how it is calling and that makes 3 fases out of the monofase so my lathe could turn left or right.

KrisM
Posts: 58
Joined: Sat Jul 27, 2019 5:40 am
Location: Belgium, East Flanders

Re: Charging time household plug

Sat Aug 24, 2019 10:26 pm

In the meanwhile I have the i3 and had to charge them. It took like forever on the household plug so I ordered a wallcharger taht will arrive monday or tuesday ... I hope :)

Boxbrownie
Posts: 87
Joined: Sat Sep 06, 2014 10:21 am
Location: Pastyland, UK

Re: Charging time household plug

Fri Oct 04, 2019 6:44 am

We use the supplied “brick” a Kopp made one (the good adjustable load one) and have done every night for over three years now, no issues at all, it takes roughly 9-10 hours to charge from almost empty as I recall, although the car is never really near empty so it normally charges to full in just three to five hours.

We were going to get a 7kw wall EVSE installed but frankly it’s just not worth it now.
Best regards........David

If anything in my post offends you please let me know, I may wish to offend you again. ;)

KrisM
Posts: 58
Joined: Sat Jul 27, 2019 5:40 am
Location: Belgium, East Flanders

Re: Charging time household plug

Fri Oct 04, 2019 6:49 am

I have the Webasto pure black now and I'm happy with it. Did just some changes to the load cable, I replaced
it with a longer one since the one that was installed was way to short for me.

Return to “BMW i3 Rex Specific Discussions”