I had a 2013 Nissan Leaf that I charged overnight to 100% everyday because I needed the range for my wife’s commute. Now the Leafs were notorious for battery degradation. BUT, I had 80% capacity when I sold the Leaf with 80K after 6 years of use. I also frequently charged using the CHADEMO fast charging port when I used the Leaf for Uber driving. This is REAL WORLD experience not theoretical musings. However, I do agree that charging to 100% wastes time.
I’m been charging my Mach E to 90% at home since I got It. I’ve occasionally charged to 100% before road tripping, but only to 80% on D/C fast chargers. Now with over 34000 miles on the odometer, I’ve experienced no loss of battery capacity at all.
I drive a 2020 Kia Niro EV and currently have 50k miles. I financed the car April 2021 and I charge to 100% at electrify America stations. I have a one car in the household so I drive a lot. I haven’t noticed any range difference from when I bought it new. I charge my car twice a week.
Thank you for the video. I wonder how many people buying an EV car are told this when they buy it. BUT and it's a BIG BUT, if you are only supposed to charge your EV battery to 80% AND you are ONLY supposed to let the battery get to 20% before charging that means you are ONLY running on a 60% charge! So, if an advertised range of an EV is 300 miles, in reality it is only 180 miles!
The 80% rule is mostly to help with battery longevity but mainly for batteries with significant amounts of nickel in them (NCA and MNC). However, a somewhat newer chemistry (LFP) uses iron instead of nickel. This does three things - lowers the overall energy density, significantly lowers the fire hazard and removes the 80% rule for battery health. Because of the lower energy density, the same size battery will have a shorter range but you get that back by being able to charge to 100% on a daily basis. As pointed out, the closer to 100% you get, regardless of the chemistry, the slower the charging becomes to the point that last 20% takes longer than the first 80%. For my car, I charge to 90% on a daily basis (home charging).
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.
I have Nissan Ariya 2024, non of the videos I saw gave me a real and honest information on the charging time, the charging time is much faster than what reviewers have shown!
Great video. I have my first Ev preordered now. It’s killing me waiting… so as I drive around in my dinosaur 2020 Gmc Sierra I like to educate myself on what’s to come. Thx again for the video. I can’t wait for my Silverado Ev rst
When to charge to 100%? I charge at home or at hotels to 100% before starting a road trip. However, helping battery life by stoping 90% may make more sense if you don't need to shorten your first charge stop. Usually the car is ready before I am, so my 100% charge is unnecessary. If I had a car with an LFP battery, I would charge to 100% once per week, and always charge to 100% before road trips.
I heard the 80% rule years ago. I've done it with cell phones, laptops and tablets. I own a Chevy Bolt EUV and I charge it at home at 120 volts and up to 80% like my other electric devices. Time will tell. Nice video.
I feel like this is due to manufacturers trying to make the numbers on paper look better than they really are. Instead of having a lower max range and building in the software controls to optimize battery longevity and charging speed they leave it to the consumer to figure out. If they want more of the general population to adopt EV's they need to do a better job with these types of issues.
I charge my Bolt to 70% (Level 2) Usually from around 35-45%. Gives me plenty of range. I could easily do with less range, but I feel my current method is better for battery life. I only charge at home (so far), and I only need to charge 2-3 times a week.
Thank you. I would have included a 20% discharge limit too. You may exacerbate range anxiety but at a great service to your viewers.
This guy is very good. Thanks for the 80% information. I am wondering if charging at low voltages also preserves the battery a little more.
Good video. I figured I check this out while charging my 2021 hyundai kona. Went to charge from 30% to 80% on a DC fast, time nearly doubled if I were to go the extra 10%.
A lithium ion battery is happiest at 50% when there is perfect equilibrium of ion charges between the positive and negative terminals and the least likelihood of electroplating which will permanently remove ions from circulation and thus degrade the battery. This is a chemical reaction and is a function of both heat and time. Up to 60% charge there is virtually no time based degradation. Up to 80% the amount of degradation is fairly minimal and that has been adopted by most batteries as a good compromise between function and degradation. Having said that 70% is better then 80% and 60% is better still. If you don’t need the full range as I don’t then it’s best to keep your charging in 40-60% band
My rav 4 prime apparently has built in buffer…. So full charge actually only fills 80% of the battery. Software won’t allow 100% charge.
I am a self defense instructor and was using an Ev Charging station for the first time, please note your surroundings- the charging station I was using was in a sketch part of town, and I was using it during the daytime… I truly believe this man that approached me was going to try and rob me until I acknowledged him, he then turned around, and went a different way. I was trying to figure out my app for the first time and was spending more time than normal trying to troubleshoot the app and charge station (I’m a tech guy imagine that). Please everybody be safe out there know your surroundings and walk the perimeter of your vehicle while syncing up to charge… be safe out there God Bless
I realize that charging past 80% takes longer, thanks to you. Question: when you charge past 80%, does it cost more $, or is it just a drawn out process that slowly fills your battery with more cost since it takes much longer?
@EVPulse