HV battery range seems very low after AC charging

[Literider150]

Sept.3 we leased a 2024 lightning Flash. So far we've only charged it twice. The last time I charged it at home on my Chargepoint home charger from about 30% to 75%. The mileage/range showing now on the truck is 195miles. That seems awfully low to me for 75% battery on a Flash with an extended range HV battery that is supposed to get @320miles!

I saw a video yesterday where an owner was noticing low range after charging. He said that another person had driven the truck and had a setting turned on that had to do with towing a trailer. As soon as he changed it - that there was no trailer attached - the mileage changed to something more reasonable. Is there something like this that I'm missing? If 195 miles range is observed with 75% of battery, another 25% wouldn't add up to anywhere near 320 miles. Believe it or not, I haven't driven the truck in a week after we did this home charge so maybe it will correct if I take it out.

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[potato]

It should correct when you take it out. The Guess-O-Meter (it's called that for a reason) estimates range based on previous driving conditions. It can't accurately predict the future.

As you noted, you can go into the towing menu and make sure it doesn't think you have a trailer attached. You can also go into the settings on the instrument cluster menus (not the main screen) and somewhere in there should be an option to clear the driving history. That should get it back to the official factory guess rather than the guess based on previous driving.

 

[Henry Ford]

This time of year I get about 2.0 kWh/m with a combination of highway and city driving. 75% of your 131 kWh battery is 98.25 kWh. If you multiply that by 2.0 it equals 196.5. In other words, it seems pretty accurate if you drive like me.

In order to get 320 miles of range from a 131 kWh battery you would need to get 2.44 kWh/m. I have not been able to do this in my 2022 Platinum but it's EPA range is only 300 miles and I don't really care about efficiency.

If this is your first EV you are going to have to think about range a little differently than you have in the past. Range=kWh x kWh/m. The truck doesn't display kWh but each percept state of charge equals 1.31.

Okay...that sounds more complicated than it is. If I'm taking a trip that might test the range due to speed, temperature, or wind I figure out what kWh/m I need before I leave and adjust my driving style accordingly. Serious road trippers probably have better techniques.

The bottom line is the range displayed on the screen is not necessarily accurate because it can't account for all variables so have a plan before you set off on your journey.

 

[JRT]

@Henry Ford just gave you exactly what you need to understand. The EPA range is rarely possible by most and everyone that starts these threads seems to be learning the hard way that a brick driven at 70+ mph is going to get 2 m/kwh. Wait till you have a storm with a major head wind.

If you recharge at home then all this is just academic. Drive till you are around 30-40% and then recharge to 80%. Since it is a lease it's not like you have to keep it anyway.

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