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Tesla Model Y Battery Health Test
This Model Y was built in June 2022. It has black paint with scratches, and this shows that it hasn't been treated well as a rental vehicle. This vehicle has 12,500 miles on it and Kyle is wondering what the battery degradation is on this vehicle as a rental and 12,500 miles.
The test took about 20 hours and was left at a slow charger in order to do so. Most degradation happens within the first year. Year 1 has the most and then it levels off. After about 1 or 2 hundred thousand miles, a Tesla will generally have about 10% with its newer vehicles.
This is a 2022 Model Y long range and was rented from Hertz. It has the 5 seat configuration and a trailer hitch. Kyle's way of gauging range is to charge the vehicle to 100% when first getting it, and then driving to 0% at a constant pace and seeing how many kWh were pulled out of the battery.
The car had a total of 12,813 miles on it. He put the car in service mode in order to run the battery health check. You can do this by holding down on the name "Model Y" or whatever your Tesla name is on the Service screen, and a prompt comes up. You type in service and then get taken to service mode.
This lets you see everything about the vehicle, including the battery health.
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How Did It Do?
You can see the battery pack temperature as well as the entire coolant system on a screen in the service menu. In Kyle's case, the battery was hot and was in a good state to be tested.
You can also see all the HVAC vents on the screen as well as test the HVAC performance. Kyle wants to see the high voltage system. It was at 4.7% state of charge. He ran the battery health test, which requires unlocking the vehicle with a card key and putting the right turn signal in the active position.
The state of charge must be below 50% before running this test, and it can take up to 24 hours. It must be plugged into an AC charging station supplying at least 6 kW of Energy. Kyle plugged it in to the charger and started the battery health test. It took some fiddling to get it to run correctly, and he left and came back to the vehicle after a day.
A couple of days later and the testing procedure worked. 79 1/2 kWh seems to be the usable battery in a new Model Y in 2023. Kyle was able to pull out 76 kWh in this range test and thought that was fantastic. That's about a 4 to 5% degradation.
The battery health results showed the battery at 93% health. Does that mean 7% degradation, or does it mean 4 to 5% degradation. There seems to be a difference between these two numbers. The 7% has more to do with degradation is Kyle's guess.
Kyle then returned the car. It looks like the car he rented from Hertz is doing pretty well. What did you think about this battery health test?
For more information, see this video from Out of Spec Reviews:
In Related News: Tesla Model Y is Big Savings For Police Departments
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Jeremy Johnson is a Tesla investor and supporter. He first invested in Tesla in 2017 after years of following Elon Musk and admiring his work ethic and intelligence. Since then, he's become a Tesla bull, covering anything about Tesla he can find, while also dabbling in other electric vehicle companies. Jeremy covers Tesla developments at Torque News. You can follow him on Twitter or LinkedIn to stay in touch and follow his Tesla news coverage on Torque News.
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