minis2003
Posts: 5
Joined: Fri Dec 28, 2018 7:21 am

REX output

Fri Jan 18, 2019 7:18 am

Does anyone know if there is a processure on how to test the output of the REX without taking it to the dealership?

rtanov
Posts: 169
Joined: Mon Oct 20, 2014 10:55 am
Location: Cincinnati, OH, USA

Re: REX output

Fri Jan 18, 2019 7:29 am

If by output you mean test the operation of the REx engine you can turn on the emissions testing mode by following these instructions:
https://www.youtube.com/watch?v=-umDh9pRCYk
2014 BMW i3 REx
2014 BMW i3 BEV - retired

minis2003
Posts: 5
Joined: Fri Dec 28, 2018 7:21 am

Re: REX output

Fri Jan 18, 2019 7:59 am

output as in Volts and Amps, not checking if it runs

TheMK
Posts: 140
Joined: Tue Sep 18, 2018 8:57 pm

Re: REX output

Fri Jan 18, 2019 10:03 am

You can use ISTA to view the electrical output of the generator. It'll also show you RPM and the like. You'll have to take the car for a test drive with REx running to get accurate results.

Joff
Posts: 15
Joined: Wed Jan 02, 2019 2:44 am

Re: REX output

Tue Apr 23, 2019 7:59 pm

I am curious what the output of the rex generator is. AC? DC? Does it match the voltage of the battery or is it converted somewhere else?

alohart
Posts: 1674
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: REX output

Wed Apr 24, 2019 12:26 am

Joff wrote:
Tue Apr 23, 2019 7:59 pm
I am curious what the output of the rex generator is. AC? DC? Does it match the voltage of the battery or is it converted somewhere else?
The I01 High-voltage Components manual describes the REx operation and its specs.
Aloha,
Art

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

AndrewDebbie
Posts: 171
Joined: Sun Aug 04, 2013 10:37 am
Location: Anglesey, Wales, UK

Re: REX output

Wed Apr 24, 2019 4:19 am

Joff wrote:
Tue Apr 23, 2019 7:59 pm
I am curious what the output of the rex generator is. AC? DC? Does it match the voltage of the battery or is it converted somewhere else?
The rex electric machine outputs 3-phase AC. The REME converts this to DC.
2014 LEAF 24 (gone)
2017 LEAF 30 (gone)
2018 Mazda 2 (Debbie's)
2018 i3s 94Ah Rex

jadnashuanh
Posts: 4483
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: REX output

Wed Apr 24, 2019 2:29 pm

On many of the REx models (newer ones may be larger), the engine is a 34-Hp device. Being overly simplistic that all of that Hp is converted to power, 34-Hp = 25.35Kw. Now, if you're lucky, the conversion efficiency is in the order of 95% or about 24Kw. But, the REx doesn't always run at maximum, especially when first warming up or under light loads.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

Joff
Posts: 15
Joined: Wed Jan 02, 2019 2:44 am

Re: REX output

Wed Apr 24, 2019 5:50 pm

alohart wrote:
Wed Apr 24, 2019 12:26 am
Joff wrote:
Tue Apr 23, 2019 7:59 pm
I am curious what the output of the rex generator is. AC? DC? Does it match the voltage of the battery or is it converted somewhere else?
The I01 High-voltage Components manual describes the REx operation and its specs.
Wow! What a huge in depth source of info, That will keep me learning for a long time, thank you!

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