C CTEK 5.0 Battery Charger on 2021 GLE 450
Thread Starter
Senior Member
Joined: Jun 2011
Posts: 356
Likes: 103
2021 GLE 450
C CTEK 5.0 Battery Charger on 2021 GLE 450
Question:
When I connect the charger, after about 45 minutes, it gets quite hot especially on the bottom but I make sure there is air that can flow underneath. The manual says it has heat temperature control but still am wondering if this is slowly burning this charger out?
It does a great job as it slowly cycles through the different stages until it gets to float. Once it goes off the 3 light bulk charge and into absorption, it cools considerably and no heat on float. I realize this charger is placing a 12 volt charge into the AGM battery and the 48 Volt battery also so it's working. I usually put the charger on when at home because of all the very short trips I take in our small community, about once a week because there's just not enough time to keep the battery charged up. Takes time to get to float.
I would think these are built to operate like this and deal with the hot temperature?
What do you think?
Should only be 1 C in the heading.
Toban
When I connect the charger, after about 45 minutes, it gets quite hot especially on the bottom but I make sure there is air that can flow underneath. The manual says it has heat temperature control but still am wondering if this is slowly burning this charger out?
It does a great job as it slowly cycles through the different stages until it gets to float. Once it goes off the 3 light bulk charge and into absorption, it cools considerably and no heat on float. I realize this charger is placing a 12 volt charge into the AGM battery and the 48 Volt battery also so it's working. I usually put the charger on when at home because of all the very short trips I take in our small community, about once a week because there's just not enough time to keep the battery charged up. Takes time to get to float.
I would think these are built to operate like this and deal with the hot temperature?
What do you think?
Should only be 1 C in the heading.
Toban
Last edited by toban; Nov 16, 2021 at 10:42 PM.
Super Member
Joined: Dec 2008
Posts: 554
Likes: 146
From: USA
2021 GLE450W4 SUV
Question:
When I connect the charger, after about 45 minutes, it gets quite hot especially on the bottom but I make sure there is air that can flow underneath. The manual says it has heat temperature control but still am wondering if this is slowly burning this charger out?
It does a great job as it slowly cycles through the different stages until it gets to float. Once it goes off the 3 light bulk charge and into absorption, it cools considerably and no heat on float. I realize this charger is placing a 12 volt charge into the AGM battery and the 48 Volt battery also so it's working. I usually put the charger on when at home because of all the very short trips I take in our small community, about once a week because there's just not enough time to keep the battery charged up. Takes time to get to float.
I would think these are built to operate like this and deal with the hot temperature?
What do you think?
Should only be 1 C in the heading.
Toban
When I connect the charger, after about 45 minutes, it gets quite hot especially on the bottom but I make sure there is air that can flow underneath. The manual says it has heat temperature control but still am wondering if this is slowly burning this charger out?
It does a great job as it slowly cycles through the different stages until it gets to float. Once it goes off the 3 light bulk charge and into absorption, it cools considerably and no heat on float. I realize this charger is placing a 12 volt charge into the AGM battery and the 48 Volt battery also so it's working. I usually put the charger on when at home because of all the very short trips I take in our small community, about once a week because there's just not enough time to keep the battery charged up. Takes time to get to float.
I would think these are built to operate like this and deal with the hot temperature?
What do you think?
Should only be 1 C in the heading.
Toban
Junior Member
Joined: Dec 2016
Posts: 52
Likes: 6
From: Upper Midwest
2021 AMG GLC63S Coupe, 2020 GLE 450
Mine gets pretty hot too but about the same when charging my 2017 GLE43 so I don’t think it’s unique to the newer battery tech. I just make sure it’s located somewhere to get good air flow and hope for the best. It does seem like it could benefit from a metal case with a fan or heat sink.
Thread Starter
Senior Member
Joined: Jun 2011
Posts: 356
Likes: 103
2021 GLE 450
Mine gets pretty hot too but about the same when charging my 2017 GLE43 so I don’t think it’s unique to the newer battery tech. I just make sure it’s located somewhere to get good air flow and hope for the best. It does seem like it could benefit from a metal case with a fan or heat sink.
Toban
Junior Member
Joined: Dec 2016
Posts: 52
Likes: 6
From: Upper Midwest
2021 AMG GLC63S Coupe, 2020 GLE 450
I’ve had mine for about 5 months. I have same car, gle 450. I just used it to top off battery as I had a trailer hooked up with lights on while I loaded a bunch of stuff.
This last time I let it run overnight so I didn’t have a chance to feel how hot it got but I know when I used it in the past on both my cars it got very warm. I think it’s normal.
This last time I let it run overnight so I didn’t have a chance to feel how hot it got but I know when I used it in the past on both my cars it got very warm. I think it’s normal.
Thread Starter
Senior Member
Joined: Jun 2011
Posts: 356
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2021 GLE 450
Thanks for your info. I think the charger has a temperature limit built in so it will only put out so many volts so not as to damage itself. Maybe this is why it takes awhile to charge everything up.
Toban
Toban
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Thread Starter
Senior Member
Joined: Jun 2011
Posts: 356
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2021 GLE 450
It probably would do but the battery tender I have on my wife’s Pilot while away this winter puts out only 1.25 Amps. It does a good job in keeping a AGM battery tuned up but it may struggle with the 48 volt and AGM system in the 450.
As I said I think this is why the CTEK gets hot the way it does until it gets to the 4 light absorption/ float mode.
Toban
As I said I think this is why the CTEK gets hot the way it does until it gets to the 4 light absorption/ float mode.
Toban
Last edited by toban; Nov 21, 2021 at 05:22 PM.
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Joined: Feb 2017
Posts: 218
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From: Apex, NC
2022 GLE 450, 2024 Volvo XC 60
It probably would do but the battery tender I have on my wife’s Pilot while away this winter puts out only 1.25 Amps. It does a good job in keeping a AGM battery tuned up but it may struggle with the 48 volt and AGM system in the 450.
As I said I think this is why the CTEK gets hot the way it does until it gets to the 4 light absorption/ float mode.
Toban
As I said I think this is why the CTEK gets hot the way it does until it gets to the 4 light absorption/ float mode.
Toban
