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Trickle charging not allowed direct to battery ????


bimmers

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bimmers

I read that we are not supposed to charge the battery by connecting direct to it. We are supposed to use one of the accessory ports. Does anyone know what this is all about. I have always had my bikes wired with a pigtail from battery for charging.

just back after a month in Europe and now it seems too hot to ride here in FL. Battery is ok but would like to have a simple connection not one with the propriary 

lighter connection.

h

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dirtrider
10 minutes ago, bimmers said:

I read that we are not supposed to charge the battery by connecting direct to it. We are supposed to use one of the accessory ports. Does anyone know what this is all about. I have always had my bikes wired with a pigtail from battery for charging.

just back after a month in Europe and now it seems too hot to ride here in FL. Battery is ok but would like to have a simple connection not one with the propriary 

lighter connection.

h

 

10 minutes ago, bimmers said:

I read that we are not supposed to charge the battery by connecting direct to it. We are supposed to use one of the accessory ports. Does anyone know what this is all about. I have always had my bikes wired with a pigtail from battery for charging.

just back after a month in Europe and now it seems too hot to ride here in FL. Battery is ok but would like to have a simple connection not one with the propriary 

lighter connection.

h

Evening  bimmers

 

It is basically a BMW caution so you don't ever exceed 15 volts during the charging cycle. (supposedly to protect the bike's electronics).

 

You can hook up battery direct with a pigtail direct to the battery but you need to make sure that your battery charger is never able to exceed 15 volts dc. Some chargers have de-sulfation cycles, or other custom cycles that could exceed 15 volts.   

 

I haven't ever heard of a damaged motorcycle but BMW does caution about it. 

 

 

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Skywagon

...I've been going direct to battery for over 20 years on multiple bikes.... My RT came new from the dealer with a pigtail to the battery. As DR said...check your charger.  I think mine only goes to 1.5 so

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My dealer (as do many others) puts a Battery Tender pigtail on the bike, wired directly to the battery, as part of the setup process. BMW no doubt hopes to drive some sales to its branded charger which is CANBUS friendly and charges through a Powerlet port, but any decent smart charger won't fry your battery. Older ferroresonant chargers would, though (they're the ones with the ammeter that starts high and goes down as it charges), and as has been mentioned even a modern smart charger can damage one if its desulfation cycle is activated. The fix for that of course is not to activate it.

 

I use a CTEK MXS 5.0. I live alone and last winter I put my 2020 GSA on one for 3 months and left town and it was fine when I got back. Right now my car has been on one for 2.5 months and I expect it'll be fine too when I get back next month.

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