Quote Originally Posted by Shaun09 View Post
If you are plugging your charger into the BMW power outlets (AND they are not wired directly to the battery or to the battery through a fuse panel), then you will need to trick the CANbus to maintain a connection between the BMW power outlet and the battery. To do so, plug your charger into the BMW power outlet either with the bike running or before switching off the ignition and then plug your charger into your wall socket (110v).
I've seen this on forums before but it's NOT in the owners manual nor is it in the instructions for the BMW charger.

It's not required when using the BMW charger.

I simply plug my charger into my not-running motorcycle at the front power outlet, plug the charger into house electricity, and it maintains my battery just fine.