Any risk for bike electronic from battery tenderer?

jogo

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Hi,
I was wondering if the bike electronics could be damaged when connecting a battery tenderer (not sure if that is the right term) to the battery while it is installed in the bike?

As far as I understand, these devices apply higher voltage during de-sulfating than during the charging (above 20V or so) . Any risk of blowing up the CAN-bus or some other fancy stuff?

Most likely a stupid question for most, however, I would be grateful for advice.

Thanks
Joerg
 
No.

Just check that the battery tender is suitable for use on motorcycle batteries. The Optimate brand is excellent for the job but there are several others, too.

I keep my 1200GSA permanently (24/7/365) connected to an Optimate battery tender, with no harm at all. I did the same on my ordinary GS, too.

http://www.accumate.co.uk/it010003.html
 
Optimate....

Jeorg,

Quite a few of us use Optimates here. If you connect a fused lead straight to the +ve and -ve terminals there will be no problems. Alternativley BMW make thier own charger (costs about 5times the cost of an Optimate) which will plug straight into the 12v accesory socket on the bike and will not conflict the CAN-Bus.
 
Why when does the handbook state that charging the battery, at the battery terminals while it is connected to the electronics of the bike can, cause problems? As can charging a completely flat battery.
I cannot believe that this is just put into the handbook so that one has to purchase a Canbus (BMW) charger.
Anybody had problems doing this?
SMB
 
SMB said:
Why when does the handbook state that charging the battery, at the battery terminals while it is connected to the electronics of the bike can, cause problems? As can charging a completely flat battery.
I cannot believe that this is just put into the handbook so that one has to purchase a Canbus (BMW) charger.
Anybody had problems doing this?
SMB
Click to expand...

It's put there so people can ignore it....

Much like everything else in the owner's manual it often seems..... :D
 
SMB said:
Why when does the handbook state that charging the battery, at the battery terminals while it is connected to the electronics of the bike can, cause problems? As can charging a completely flat battery.
I cannot believe that this is just put into the handbook so that one has to purchase a Canbus (BMW) charger.
Anybody had problems doing this?
SMB
Click to expand...

Theoretically if you gave it a big enough charge then you probably could knacker the system (see how confident I sound). Its much easier to say don't do it, than to list the devices that do work safely, which will be out of date when the bike is second hand, and will also look like you're favouring the few manufacturers that you mention.

TobyS

Oh and Wapping, I'm assuming you leave the cables plugged in, not the optimate when you ride. I was just being facetious.
 
No worries

SMB said:
Why when does the handbook state that charging the battery, at the battery terminals while it is connected to the electronics of the bike can, cause problems? As can charging a completely flat battery.
I cannot believe that this is just put into the handbook so that one has to purchase a Canbus (BMW) charger.
Anybody had problems doing this?
SMB
Click to expand...

Its to prevent someone attaching an unsuitable charger to a completely flat battery. If you put a high current charger onto a completely flat lead acid battery it could pull the max current for that charger at up to 14.5v (or higher).
This MIGHT do the onboard electrics damage. :blast

Its put in there as a "nah nah nee nah nah" in case you do. My Optimate was connected at 6months (just prior to its 1st winter) my dealer was aware and wasnt concerned about it effecting my warranty.
Its been on since.... No problems.
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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