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Concerned about my 2018 Model 3's battery range – is this normal degradation?

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Steve N. · rep 0 · May 22, 5:26 AM · 1 replies · solved · Question

Vehicle: 2018 Tesla Model 3 Long Range

Hey everyone,

I've got a 2018 Tesla Model 3 Long Range, and lately, I've noticed a significant drop in my estimated range. When it was new, I'd consistently get close to the advertised range, but now, fully charged, it shows about 260 miles, down from around 310. I know battery degradation is a thing, but this feels a bit much for a car that's only a few years old.

I usually charge to 80-90% daily and only go to 100% for long trips. I'm wondering if there's anything I should be doing differently or if this is just par for the course with an older Model 3. Is there any DIY maintenance I can do to help preserve battery health, or should I be looking into a service appointment?

Any advice from other 2018 Model 3 owners would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:26 AM

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ClearTheCode admin answer:

Battery degradation is a natural process for all lithium-ion batteries, including those in your 2018 Tesla Model 3. While a drop from 310 to 260 miles (approximately 16%) might seem significant, it's within the expected range for a vehicle of that age and mileage, especially considering the early Model 3s.

Here's what you should know and what you can do:

  1. Understand Range Estimates: The displayed range is an estimate based on various factors, including recent driving efficiency, temperature, and battery health. It's not always a precise indicator of the battery's absolute capacity.
  2. Charging Habits: Your current habit of charging to 80-90% daily and 100% only for trips is excellent for battery longevity. Avoid routinely discharging below 20% if possible.
  3. Software Updates: Ensure your Tesla's software is always up to date. Tesla frequently releases updates that optimize battery management and thermal control, which can impact perceived range and battery health.
  4. Tire Pressure: Incorrect tire pressure can significantly impact efficiency and, consequently, your perceived range. Check your tire pressure regularly and maintain it at the recommended PSI (found on the driver's side door jamb).
  5. Driving Style: Aggressive acceleration and high speeds consume more energy. A smoother driving style can improve efficiency and make your range go further.

Causes of Perceived Range Loss:

  • Actual Battery Degradation: Chemical changes over time reduce the battery's ability to hold a full charge.
  • Software Recalibration: Tesla's Battery Management System (BMS) continuously learns. Sometimes, a perceived drop can be the BMS recalibrating for more accurate estimates.
  • Environmental Factors: Cold weather significantly reduces battery efficiency and range. Using HVAC also consumes energy.

When to See a Shop: If you notice a sudden, drastic drop in range (e.g., 20%+ overnight) that isn't explained by temperature changes or recent driving, or if you receive any battery-related warnings on your screen, it's advisable to schedule a service appointment with Tesla. They have specialized diagnostic tools to assess the battery's true health and can perform a battery health check. While some degradation is normal, unusual patterns could indicate an underlying issue that requires professional attention.

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