GLE450e - charging recommended to 80%?
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GLE450e - charging recommended to 80%?
Hello all. Just got a 450e PHEV, coming from an X5 45e PHEV. The dealer told me they recommend charging the battery to 80% (not 100%). Did not have that guidance with the BMW, so trying to understand if this is overly cautious (especially given the 10yr/150k mile warranty on the battery?). Thanks much.
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2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
Hello all. Just got a 450e PHEV, coming from an X5 45e PHEV. The dealer told me they recommend charging the battery to 80% (not 100%). Did not have that guidance with the BMW, so trying to understand if this is overly cautious (especially given the 10yr/150k mile warranty on the battery?). Thanks much.
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From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
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I was told by the dealer it's 10 years / 150k miles for the battery warranty. Why do you think it varies by state? I will see if I can find some specific literature. Thanks!
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From: Northeast Florida
2024 GLE450e
We charge to 100% all the time. I didn’t by the PHEV to give up 20% of my all electric capacity. We charge with level 2 at home at 9.6 kWh. Since the battery can take fast charging at about 60 kWh, I don’t see how Level 2 charging is going to impact the battery in the time that I own it. We are about 7000 mile per year drivers on this car and the warranty will far outlast how long we own it.
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2024 GLE 450e
We charge to 100% all the time. I didn’t by the PHEV to give up 20% of my all electric capacity. We charge with level 2 at home at 9.6 kWh. Since the battery can take fast charging at about 60 kWh, I don’t see how Level 2 charging is going to impact the battery in the time that I own it. We are about 7000 mile per year drivers on this car and the warranty will far outlast how long we own it.
I think PHEV like hybrids are designed for frequent full charge / discharge.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
If you want maximum range, charge to 100% drive to 0%. if you want maximum battery longevity, charge to ~80% - 85% and drive to ~20%. This is true for all lithium based batteries regardless of the device they're installed in. Lithium batteries are a consumable. The more times you are at the extreme ends of the charge the faster it will be consumed.
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From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
Thanks. Does high speed charging include Level 2 home charging (Ie not supercharger at a travel plaza)?
I was told by the dealer it's 10 years / 150k miles for the battery warranty. Why do you think it varies by state? I will see if I can find some specific literature. Thanks!
I was told by the dealer it's 10 years / 150k miles for the battery warranty. Why do you think it varies by state? I will see if I can find some specific literature. Thanks!
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From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
If you want maximum range, charge to 100% drive to 0%. if you want maximum battery longevity, charge to ~80% - 85% and drive to ~20%. This is true for all lithium based batteries regardless of the device they're installed in. Lithium batteries are a consumable. The more times you are at the extreme ends of the charge the faster it will be consumed.
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2024 GLE 450e
If you want maximum range, charge to 100% drive to 0%. if you want maximum battery longevity, charge to ~80% - 85% and drive to ~20%. This is true for all lithium based batteries regardless of the device they're installed in. Lithium batteries are a consumable. The more times you are at the extreme ends of the charge the faster it will be consumed.
so it is not being cycle stressed the way you think
my bet is even if you discharge to 0 and charge to 100 you will be onto your next vehicle before the battery performance degrades.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
yeah maybe. but what you are forgetting is when the 450e show 0 miles range that is not zero charge on the battery
so it is not being cycle stressed the way you think
my bet is even if you discharge to 0 and charge to 100 you will be onto your next vehicle before the battery performance degrades.
so it is not being cycle stressed the way you think
my bet is even if you discharge to 0 and charge to 100 you will be onto your next vehicle before the battery performance degrades.
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From: Medina, Oh
2022 GLE 350
If you want maximum range, charge to 100% drive to 0%. if you want maximum battery longevity, charge to ~80% - 85% and drive to ~20%. This is true for all lithium based batteries regardless of the device they're installed in. Lithium batteries are a consumable. The more times you are at the extreme ends of the charge the faster it will be consumed.
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From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
Agree with want but that doesn't mean they can't surface it for those of us who do care. The rest can simply ignore it. If it's in the workshop menu those who care will find it and the rest will be no worse off than they are now. Information is power and those who choose to remain uninformed are giving it away.
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2024 GLE 450e
Agree with want but that doesn't mean they can't surface it for those of us who do care. The rest can simply ignore it. If it's in the workshop menu those who care will find it and the rest will be no worse off than they are now. Information is power and those who choose to remain uninformed are giving it away.
If you don’t trust Mercedes technology to do a better job than you, time for a different brand.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
There is no limit to propulsion system data you could surface. Pressure in each cylinder, motor winding temperature, internal battery resistance, max discharge rate, transmission slip, etc. etc. At some point with complex technologies, the engine management systems, if well designed, will do a better job than amateur grease monkeys gauge obsessing rather than driving.
If you don’t trust Mercedes technology to do a better job than you, time for a different brand.
If you don’t trust Mercedes technology to do a better job than you, time for a different brand.
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
Specifically with batteries I don't trust any brand. They all know batteries are consumable and that there are ways to extend their life yet don't do anything to educate consumers on these details. Yes some, perhaps even most, will not care but I'm using a 5 year old phone with the original battery and very little capacity loss because I educated myself about the batteries and found a way to keep it in the optimum charge range. IMO anything with a battery in it should give the consumer the choice of maximum capacity or maximum longevity. And yes I know I'm in the minority.
They (and I) don't pay attention to individual cell activity, since there's no practical way to balance or replace them individually. I do check individual cells on my FLA batteries with a hydrometer to ensure that they don't need equalization, though.
My 25 year old Porter Cable battery tools are still alive, although 2 of the 4 batteries are near life's end.
It's what we all do in this day of battery-driven everything.
If I leave any of my cars un-driven for a week, it's on my CTEK maintainer. I expect at least seven years out of all my car batteries - AGM, VRLA or FLA. I've met those expectations for decades.
Last edited by mikapen; Feb 26, 2025 at 03:05 PM.
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SL63
Everybody I know pays attention to their battery settings to prolong life.
They (and I) don't pay attention to individual cell activity, since there's no practical way to balance or replace them individually. I do check individual cells on my FLA batteries with a hydrometer to ensure that they don't need equalization, though.
My 25 year old Porter Cable battery tools are still alive, although 2 of the 4 batteries are near life's end.
It's what we all do in this day of battery-driven everything.
If I leave any of my cars un-driven for a week, it's on my CTEK maintainer. I expect at least seven years out of all my car batteries - AGM, VRLA or FLA. I've met those expectations for decades.
They (and I) don't pay attention to individual cell activity, since there's no practical way to balance or replace them individually. I do check individual cells on my FLA batteries with a hydrometer to ensure that they don't need equalization, though.
My 25 year old Porter Cable battery tools are still alive, although 2 of the 4 batteries are near life's end.
It's what we all do in this day of battery-driven everything.
If I leave any of my cars un-driven for a week, it's on my CTEK maintainer. I expect at least seven years out of all my car batteries - AGM, VRLA or FLA. I've met those expectations for decades.
The most I have heard of a car battery lasting is 10 years, but I don’t doubt that even a bit longer would be possible.
Last edited by MB2timer; Feb 26, 2025 at 05:19 PM. Reason: +out
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2024 GLE 450e
Specifically with batteries I don't trust any brand. They all know batteries are consumable and that there are ways to extend their life yet don't do anything to educate consumers on these details. Yes some, perhaps even most, will not care but I'm using a 5 year old phone with the original battery and very little capacity loss because I educated myself about the batteries and found a way to keep it in the optimum charge range. IMO anything with a battery in it should give the consumer the choice of maximum capacity or maximum longevity. And yes I know I'm in the minority.
The battery warranty is 10 years is a great safety net.
I think a more serious concern is not using your ICE frequently enough in the city and it being called into action without a warm up period.
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2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
There doesn’t appear to be a lot of information on that part of it. I have to hope that MB has accounted for that. Perhaps oil is circulating even when the engine is off.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
While I appreciate your concern, I believe there has been significant advancement in battery management methods in phones, laptops and vehicles. If the steps you intend to do manually made a meaningful improvement, do you really think it could not be done automatically by an algorithm?
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2024 GLE 450e
Sure it could, but the manufacturers would have to give up capacity. There's no algorithm that can charge to 100% or drain to 0% without shortening the batteries life. It's a chemistry thing. I'll buy that the charge algorithms are better than they were, but unless they offer consumers the option of limiting capacity on demand they are still consuming the battery faster than needed in most cases. In an EV of course there is far more capacity to start with so the degradation will be less impactful than on a smaller device until it simply reaches its end of life.
similarly 0% charge may not mean the battery is fully depleted but that the do not want it to deplete further.
in fact when my vehicle reads zero I still get the engine shutting off any running only in battery in hybrid operation
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
you are assuming the 100% shon on the dash means the battery is fully charged… while it could mean it is as much charged as they deem to be good for battery life.
similarly 0% charge may not mean the battery is fully depleted but that the do not want it to deplete further.
in fact when my vehicle reads zero I still get the engine shutting off any running only in battery in hybrid operation
similarly 0% charge may not mean the battery is fully depleted but that the do not want it to deplete further.
in fact when my vehicle reads zero I still get the engine shutting off any running only in battery in hybrid operation
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W167 2021 GLE63S, W223 2022 S580
Range
True, now we're back to needing the actual voltage to make a determination. I suppose when I state 100% or 0% I'm matching it with the physical battery state of charge, not what was chosen to be displayed. If MB chose to use 100% and 0% that does not correspond to voltage based SOC they should note the voltages they use for 100% & 0% respectively. It would also mean that they are giving up a percentage of range and given that range is usually the #1 concern people have with electric vehicles I think all manufacturers want to eek out as much range as possible. Caveat here of course being that the 450e is a PHEV and not an EV so maybe they don't care as much about getting every last mile of range out of it.
There was the similar discussion on that model in that forum over MB deletion of DC charging on that model
https://mbworld.org/forums/s-class-w...580e-mean.html
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2024 GLE 450e
True, now we're back to needing the actual voltage to make a determination. I suppose when I state 100% or 0% I'm matching it with the physical battery state of charge, not what was chosen to be displayed. If MB chose to use 100% and 0% that does not correspond to voltage based SOC they should note the voltages they use for 100% & 0% respectively. It would also mean that they are giving up a percentage of range and given that range is usually the #1 concern people have with electric vehicles I think all manufacturers want to eek out as much range as possible. Caveat here of course being that the 450e is a PHEV and not an EV so maybe they don't care as much about getting every last mile of range out of it.
Battery voltage is not linear with state of charge. It is a flat curve with a sudden drop off. So voltage alone is hard to interpret.
