[PackPride85]

Originally Posted by Matt Devo

what I used: https://www.amazon.com/dp/B000NPT4TK

mainly use it for bench testing head units etc

This is probably OK but bare minimum. 13.8V at 30A is under the BMW recommended current minimum.

If you are handy with DIY electronics this is probably the best value solution:

https://f80.bimmerpost.com/forums/sh....php?t=1262137