What is the Electric Vehicle 80% Rule? | EV Basics

EVs are so ridiculous. The 80% rule is actually the 60% rule Don't forget you're not supposed to discharge your vehicle below 20%.

Okay Seth Myers. lol

Or they can limit the capacity to 80% and display 100% to the user.

Hey people, can I ask a very important question here? I'm anxious to get really good informed opinion on this because unfortunately living in Southwest, (specifically Las Vegas) we are more vulnerable to our EV's being permanately damaged right? Well that's my question, does level 2 charging and driving my EV (even if it's liquid cooled with proper thermal management) irrevocably compromise the long term battery range of the battery when the car is charging at night and it's still 85 degrees? I know I should expect less range in the summer, but does driving the car in 100 plus temperatures from May until late August, actually permanately shorten the battery's lifespan , or is driving the car in these temperatures and charging the car during these warm to severe hot summer months, going to have only a ''summer impact'' and when the temperatures cool in the non summer months, I won't see any permanent loss of range over time?

I wish there was consistent opinions out there, when I ask this question, but there isn't,

some cars are better than other at this... Hyundai Iconiq fro example is rated at 38kw... in actual fact the battery is around 40-41, just by default your not allowed to access as a consumer that part of the battery to keep the health up

One year later... It doesn't really apply anymore to the new LFP blade batteries. You charge them to 100% with no damage. And if you had only known back then about sodium ion batteries...

I am doing 40% ---> 70% now for routine driving and charging. I reckon I won't need to top it up from the home-charger much more often than twice per week, and only save the 100% for long country road trips 👌😃

lol so in winter let's fill the battery up to 80% and lose 20% because I want to be warm, Let's hope I don't have a long drive or I won't have the range to leave the house, your battery in your car is no different to you mobile, starts off fast and slows down when full, only difference with EVs people won't want the slowing down part.

So if it says keep between 20 and 80% does that mean I have to run the battery down for 20% before I charge it back up to 80? Or can I charge it anywhere in between

Wireless charging is more expensive and less efficient, not recommended unless wired is not possible at all

So, only charge to 80%. Then, recharge at 20%.
Therefore, the manufacturers range is, in reality, 60% of the quoted range, less in winter or hot summer.
No thanks, I'll stick with my gas fueled car, it gives 830 km range and about 5 minutes to refuel.

But, many cars keep their batteries in a better temperature range when parked on a level 1 or 2 plug. So, which effects battery life more, temperature or state of charge?

I'll stick to 0% charge. Giant scam for giant virtue signallers.

The most optimal is 65-75%

I have a Tesla Solar system with backup battery and I've noticed once my VW ID.4 gets up to 80% it continues to use about 8.5KWH the whole time its plugged in no matter what percentage the charge is at which I find interesting. Where does that extra power go if the charge slows down at 80%?

Great video i hate electric cars i got stranded not being able to find a port

Bad for the battery is high charge low charge cold or hot
Fast charge is very bad too 😅😅😅

I've been driving ICE cars for the best part of 40 years, and I have never had to worry about filling the tank up to 100% full or running it down to virtually empty.... I've done this thousands of times, and I can't ever remember the engine or fuel tank blowing up 🤣 or my range decreasing 😂 And the first litre goes in the same speed as a last litre (and every litre in between) 🤣🤣🤣

I top it off to 100% and drain it to nearly 0% in the hope my battery capacity will hit below 70%. That way, I can get a brand-new battery.

If that's the case, then EV company should only allow to advertise their range within the 80% of their battery capacity. If 300 miles range is on 100%, then the real range that consumer should be buying into is 240 miles range. When I pay for it, I should be paying for 240 miles range, not 300 miles range as advertised.

The battery’s cathode/anode expands and contracts as it get to be charged and discharged. The repeated expansion/contraction between 100 and 0 charge level due to daily charging degrade the battery life.

I derate my Wirenuts by never using them on a circuit over 70amps

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There really is no debate of EVs being the future.

One day, this rule will be only temporary . . Onxe bayyery technology improves, all wil be well.

Traditional lead acid batteries in gasoline & deisel vehicles work the same way at obviously lower voltages. A dead flat 12 volt battery will start charging at around 20 amps then as voltage increases the rate of charge slows to 2 amps and eventually charging will stop when battery is fully charged

Lots of talk. but you didn’t explain why longivity is impacted when charging over 80%

I agree that EV’s reach 80% faster than always going to 100%, but disagree with any discussion that says you increase battery life. The battery management systems on the vehicle protects the battery, if it didn’t all EV mfg’s would be in a world of hurt.

So why don't the manufacturers estimate the real world range of the vehicle at 80% if this is what they recommend.

Und warum ist unter 20% und über 80% nicht gut? Weil sich die Graphide Adode dann stark ausdehnt oder zusammenzieht und somit Risse entstehen können und Lithium Dendriten abbrechen können.

I like the "theater seating" example. I've always said that it's like filling a bucket with water to the top without spilling any. You have to slow down the flow at the end.

Yes, I always fill my gas tank to 80% capacity to make the gas tank last longer.

why do you only talk about fast charging

Why don't they just make 80% = 100%. Just don't allow a battery to go to 100%.

Smart money is buying a battery that far exceeds your range - charge from 20% to 80% rapidly, and that 60% is all you ever need!

My 2023 Nissan Ariya has 91 kW battery but only 87 kW usable. Nissan does not state that the battery should be charge to 80% rule. With the 4 kW buffer, i usually charge to 95%. Good or bad?

If the minimum is 10% and 80% the highest, you leave out 30% capacity and the real world consumption does not match estimated range supplied by manufacturers, even worse in winter 😂

LFP batteries can be charged up to 100% over 1500 cycles without degradation ,
at 2000 full cycles degradation reach 3-4% it means you can do easy 350k miles range with minimal degradation

So, eg, say an ev range has a miserable 250 miles on a full charge, but you don't full charge to 100%...so the range is less... Marvellous

Interesting that hybrid cars are designed to routinely charge to 100% on a constant basis.

This is one of the biggest drawbacks to EVs. In order to get the same range of an ICE car, you'd need something like 1000 miles of range, since only 50% of the battery is safe to use long-term (30-80 rule).

Another great analogy which I learned in high school physics class was filling up a glass or bottle of with water at the tap. The closer you get to the bottom, the slower you have to add the water otherwise the air bubbles trapped in the water will pile up and push water out.

The increasing voltage in the battery creates a similar sort of "resistance" to charging which is also why KIA moved to 800 Volt charging technology.

LFP batteries are different and the manual tells you to charge it to 100% at LEAST once a week and doesn't damage the battery this is wrong information!

What he doesn’t mention is that there are not enough charging ports around the country. You have to purchase your own charging port to have one at home which is about $1500. The free, charging ports they have it parks, constantly consume with people that all electric cars charging their vehicles constantly.

And even lithiums cant go to 0 without damage. Fast charging reduces life, and other little idiosyncrasies. EVs are interesting but not for anyone outside a city.

All I here is only charge your EV battery 10% to 80% from the manufacturer. If that is the case, then the expected range of these EVs should be reported at 80%, not 100%.

Don't know about 80%, but for 100% DON'T BUY..so simple

This is true for any Lithium battery system.