[cm048]

I use Eltek Multicharger 1500, Upto 100A/12V current.

Though on the expensive side ~800 EUR. It is one of the suggested power supply by BMW.
The important feature is soft start supply mode. It measures the actual voltage level of the vehicle at the connection point, starting power supply mode at the measured voltage level, then slowly increase the voltage to the target level, this voltage increase will take some seconds to reach target voltage.
I am quite happy with the softstart as it reduce the surge which dangerous to both electronic and car battery.

It is also suggest within BMW ISTA/P manual to use soft start mode for Multicharger 1500.

[Mr Bimmer]

I use a ' Fronius Acctiva professional flash'. It's a very nice sturdy and portable unit that's dead stable and outputs 70a

[jimmy9980]

I bought this and it works perfect got it for $325.00 went up in price

Amazon Charger

[BusyBox]

I use two DPS-600PB (google it) in parallel with a digital display, total cost of $65. It's is capable of load sharing up to ~80A@(13-13.7V max which is good for F8x series) in parallel Config. It doesn't look fancy but it does the job and it was fun to mod it.

Is there an easy and safe way to increase the rated voltage from 12.15V to lets say 13.7V?

[ruben_17non]

Approbed battery chargers by bmw AG

Approved Battery Chargers.pdf
File Type:
Downloaded:	238 times
Size:	35.04 KB

[jimmy9980]

I used mine for 4 years and it works perfect. Provides up to 70AMPS I have never seen the car draw that much 50 max. Mine is a f10 M5

[abuqutaita]

I bought this and it works perfect got it for $325.00 went up in price

Amazon Charger

I have this one too, and bought it for less than $400 "like new" from amazon marketplace.

[mipe]

Hi,

I use MAAS SPS 50 II Bench Power Supply 9-15V DC / 55 A and working good

http://www.pjbox.co.uk/maas-sps-50-ii-be...-55-a.html

MiPe

[aboulfad]

I use two DPS-600PB (google it) in parallel with a digital display, total cost of $65. It's is capable of load sharing up to ~80A@(13-13.7V max which is good for F8x series) in parallel Config. It doesn't look fancy but it does the job and it was fun to mod it.

Is there an easy and safe way to increase the rated voltage from 12.15V to lets say 13.7V?

Yep, you wire a 3k pot between sense pins 7 & 9 and adjust as follows:
Here's a few examples of connecting +S to -S via a resistor and the resulting output voltage, but you don't really need 13.7 for flashing and the closer to OVP (13.8V) it may shut down. You can google and you will find many discussions over at rcgroups.

1.8K ......... 13.8V
2.1K ......... 13.6V
2.3K ......... 13.5V
2.7K ......... 13.35V
3.3K ......... 13.2V
3.9K ......... 13.1V
4.7K ......... 13.0V
10K .......... 12.7V

[ninja_zx11]

I built mine from server power supply and can do 14.4 Volts at 120 Amps @110v input.Sorry for the large size pics.