[Trogster]

Originally Posted by Tag

You can just lay some towels over that area.

Indeed.

I have rubber sheets that can be located in the engine bay to minimize risk. Plus I can insulate my tools with heat shrink tubing.

However if removing the battery negative terminal alleviates all risk with little to no impact to vehicle memory settings, that seems the sensible approach.

[///M TOWN]

Originally Posted by Tag

Registration is only required for a new battery, you don't need to (nor should you) do that when reconnecting your battery.

I always hardwire mine

Makes it easy to plug and unplug on the fly

[RockCrusher]

Originally Posted by Trogster

That's certainly an option.

As I would hardwire a tender, I would still prefer to disconnect the battery during the installation.

Again, any issues to anticipate when reconnecting the car battery?

I've not had a chance to observe this at the BMW dealer but it was SOP at the Porsche dealer when a vehicle was in and the battery needed to be disconnected the tech would connect 12V shop power to the vehicle to ensure no upset to any of the vehicle's electronics.

My advice would be to stop in at the local BMW dealer service department and ask if the car would need shop power while the battery was disconnected.

[Tag]

Originally Posted by ///M TOWN

I always hardwire mine

Makes it easy to plug and unplug on the fly

Same here, got tired of having to pop open the hood every time. Hardwired the CTEK and never looked back.

[Trogster]

All charged up!

[KC87ZB]

Originally Posted by Trogster

Indeed.

I have rubber sheets ...

I use a DIN connection on my motorcycle for my tender so it is a quick park and plug, but that's because the MC has a DIN socket that's always on. I'm going to hardwire in an SAE connector for the M2 and just zip tie the end where I can reach it without popping the hood.

Trogster, you'll be fine disconnecting the battery for that duration but also with care you can do it live. That said, you should use a method you are comfortable with.

[Trogster]

Originally Posted by KC87ZB

I use a DIN connection on my motorcycle for my tender so it is a quick park and plug, but that's because the MC has a DIN socket that's always on. I'm going to hardwire in an SAE connector for the M2 and just zip tie the end where I can reach it without popping the hood.

Trogster, you'll be fine disconnecting the battery for that duration but also with care you can do it live. That said, you should use a method you are comfortable with.

I elected to wire the CTEK connector live.

I took numerous (perhaps excessive) precautions to ensure no ground path:

1- Wrapped rubber sheet around engine bay cross brace
2- Wrapped my ratchet/extension/Torx fitting with duct tape
3- Wore rubber gloves
4- Wore sweat pants/sweater with no zippers
5- Wore trainers with rubber soles

No issues to report. The entire process took perhaps 5-minutes.

[Tag]

Originally Posted by Trogster

I elected to wired the CTEK connector live.

I took numerous (perhaps excessive) precautions to ensure no ground path:

1- Wrapped rubber sheet around engine bay cross brace
2- Wrapped my ratchet/extension/Torx fitting with duct tape
3- Wore rubber gloves
4- Wore sweat pants/sweater with no zippers
5- Wore trainers with rubber soles

No issues to report. The entire process took perhaps 5-minutes.

That's beyond excessive.

Understandable you shielded the area around the leads, but it was unnecessary to wear gloves, rubber soled shoes, etc. Car batteries have too low of a voltage and can't electrocute or pass current through you. If you grab both positive and negative terminals with your bare hands nothing will happen. If you grabbed the positive terminal and were standing barefoot on the ground which had a metal sheet on it nothing would happen.

You would however make an excellent BEVs tech!

[Trogster]

Originally Posted by Tag

That's beyond excessive.

Understandable you shielded the area around the leads, but it was unnecessary to wear gloves, rubber soled shoes, etc. Car batteries have too low of a voltage and can't electrocute or pass current through you. If you grab both positive and negative terminals with your bare hands nothing will happen. If you grabbed the positive terminal and were standing barefoot on the ground which had a metal sheet on it nothing would happen.

You would however make an excellent BEVs tech!

I have a pacemaker.

[Tag]

Originally Posted by Trogster

I have a pacemaker.

Sorry, it all makes sense now.

[aerobod]

The CTEK 0.8 is working well for me to keep the battery in good shape, suspended above the car for easy access, plus a piece of shop towel on the door handle to remind me the car is plugged in:

[TjGill]

Originally Posted by Tag

Same here, got tired of having to pop open the hood every time. Hardwired the CTEK and never looked back.

Tag Where does the connector come out from under the hood? Are you able to share a pic. Thanks

[JABCAT]

My Z06 gets less than 1k mi/year. It sits for months at a time & is always on a CTEK tender. No issues.