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Charging via the 12volt connection socket?

  • <i class="fa--xf fal fa-check "><svg xmlns="http://www.w3.org/2000/svg" role="img" aria-hidden="true" ><use href="/data/local/icons/light.svg?v=1789222567#check"></use></svg></i> Discussion starter Discussion starter Stu4R18
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Stu4R18

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Joined
Sep 7, 2026
Messages
12
Location
Colchester
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Bike
R18 Classic First Edition
Hello,

Is there a setting that needs to be enabled to allow Optimate4 charging via the 12volt socket?

If I'm not using bike for a few days, I pop it on charge using Otimate4 charger and all seems well until the bike turns off the power after 10 minutes or so.

Once the power goes off the charging stops. I even purchased a new lead in case my original wasn't Can-Bus, but this didn't help?
https://www.amazon.co.uk/dp/B005DUM9OM?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1Plugged-In-Ignition-off.jpg
 
I have a Optimate 4 quad premium and all I had to do is set the battery type (Pb or Li) and it detected the battery and charge level when I plugged it in. I have been very happy with it. That one looks different than mine.
 
I have a Optimate 4 quad premium and all I had to do is set the battery type (Pb or Li) and it detected the battery and charge level when I plugged it in. I have been very happy with it. That one looks different than mine.
It was working perfectly well on my 2010 Triumph1050 Sprint
 
The BMW Powerlet sockets are fed 12v through a relay that is only on(switched) when the bikes power is on. The BMW charger is setup to charge through the 12V powerlet port as it activates the relay. Other chargers may not do this and you will have to connect a charging pigtail socket directly to the battery connections.
 
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