LFP battery vs. NCM

[Dsirois]

Considering an MME premium with choice of standard range vs extended. Are LFP batteries better because you can actually charge to 100%. Plus standard range LFP are $7k less than extended range. Help me decide

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[Dsirois]

LFP battery = charge to 100% = 250 mile range
Extended Range battery 320 mile range, BUT recommended max 80% charge = 256 miles
Seems pretty close to me. What am I missing except for $7k?

 

[Rt1AWD]

LFP battery = charge to 100% = 250 mile range
Extended Range battery 320 mile range, BUT recommended max 80% charge = 256 miles
Seems pretty close to me. What am I missing except for $7k?

I thought the recommended threshold is 90%

 

[MellowJohnny]

LFP is also affected more than LiOn by the cold. But as long as you're in the warm part of Florida should be a wash

 

[Dsirois]

Even at 90%, I'd gain only 38 miles with the extended range.

 

[Pioneer74]

Even at 90%, I'd gain only 38 miles with the extended range.

You can still charge the ER battery to 100%. It's just not recommended to do it daily. You only do it when you need it.

 

[RickMachE]

Your range comparison is flawed. All batteries can be charged to 100% for a trip. And, regardless of the type, going from 80 to 100% on a DC fast charger takes as long as going from 20 to 80%.

 

[Dsirois]

Thank you for the input. This is certainly a learning curve. I don’t see the benefit of ER for $7k as I will mainly use for local driving in Central Florida. Maybe one long trip per year which I’ll have to plan out.

 

[Rt1AWD]

Even at 90%, I'd gain only 38 miles with the extended range.

It is totally Ok to charge to 100% once in a while. It is just not recommended to do it regularly and on fast charger

So for everyday use you have 288, which is more then enough. But if you go to some trip you can use all 320 miles. With LFP you don't have this option. That is basically it.

 

[RickMachE]

Thank you for the input. This is certainly a learning curve. I don’t see the benefit of ER for $7k as I will mainly use for local driving in Central Florida. Maybe one long trip per year which I’ll have to plan out.

In your use case, SR is fine.

 

[Rt1AWD]

Thank you for the input. This is certainly a learning curve. I don’t see the benefit of ER for $7k as I will mainly use for local driving in Central Florida. Maybe one long trip per year which I’ll have to plan out.

Another advantage is that theoretically you will be able to use your car longer considering the natural degradation. For example when your ER battery gets to 70% state of degradation you'll still have 224 miles
On the standard range you'll have only 175 miles

 

[MacherAWD]

Thank you for the input. This is certainly a learning curve. I don’t see the benefit of ER for $7k as I will mainly use for local driving in Central Florida. Maybe one long trip per year which I’ll have to plan out.

We live in New England, almost all road trips are under 2hrs, we do longer, 5 hrs or so, twice a year. SR AWD 21 for us, 220 miles, handles all our needs. SR Litium ion battery.

 

[Dsirois]

Is the SR less likely to be affected by the HVBJB issues?

We live in New England, almost all road trips are under 2hrs, we do longer, 5 hrs or so, twice a year. SR AWD 21 for us, 220 miles, handles all our needs. SR Litium ion battery.

what is your range at 100%?

 

[Scooby24]

Even at 90%, I'd gain only 38 miles with the extended range.

If you need the extra range you're not charging to 90%, you're charging to 100%. The extended range battery gives you an additional 60 miles.

There's no point in comparing the NMC battery at 90% versus the LFP at 100% because you're not going to use all the range at 90% in a single day.

If you were, you'd definitely want the NMC.

But if you don't see a justification for it, you don't need it so don't buy it.

 

[HGxxx]

Is the SR less likely to be affected by the HVBJB issues?

what is your range at 100%?

That's been the case with the NMC chemistry that Sr pack is less affected, but I don't think anyone knows about the HVBJB with the LFP pack. I mean all 23s should have the new less failure prone part anyway.

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