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+--- Thread: 2017 740i G12 istep (/showthread.php?tid=9443)
2017 740i G12 istep - Tkhemili - 12-22-2025
I am planning to update my i-step version of my 2017 G12 7 series with E-sys. I have a battery maintainer. Should this be sufficient?
https://www.manualslib.com/manual/523929/Schumacher-Xc75.html
RE: 2017 740i G12 istep - fliyer - 12-23-2025
the maintainer needs the supply function with 80 - 100Ah .
this is what i have
https://de.aliexpress.com/item/1005006980830319.html?spm=a2g0o.order_list.order_list_main.111.4eab5c5fkMoljz&gatewayAdapt=glo2deu
RE: 2017 740i G12 istep - ek1978 - 12-23-2025
(12-22-2025, 11:12 PM)Tkhemili Wrote: I am planning to update my i-step version of my 2017 G12 7 series with E-sys. I have a battery maintainer. Should this be sufficient?
https://www.manualslib.com/manual/523929/Schumacher-Xc75.html
This is only a 12V battery charger according to the specs.
You need a good power supply which can provide around 13.5V with nearly 100Ah like the one posted by Fliyer.
There is a big difference between battery charger and power supply. I personally built my own power supply out of 2 powerful Server power supplies , each is 60Ah @ 14V. But ready made ones are all over the internet.
RE: 2017 740i G12 istep - Tkhemili - 12-23-2025
Sounds good. Thanks guys. I will use one of those instead.