Why Tesla RWD Models Recommend 100% Charging: The Truth About LFP Batteries

① Introduction 🚗

If you own or are considering a Tesla RWD model, you may have wondered:

• Why is 100% charging recommended only for RWD?
• Doesn’t full charging damage the battery?

This article explains how LFP batteries work, why 100% charging is recommended, and how to use them properly in daily life, in a clear and beginner-friendly way.

② Main Explanation｜Why LFP Batteries Need 100% Charging 🔋

The short answer is battery calibration accuracy.

Tesla RWD models use LFP (Lithium Iron Phosphate) batteries, which behave very differently from traditional NMC batteries used in Long Range and Performance models.

LFP batteries have an extremely flat voltage curve.
This means the voltage barely changes whether the battery is at 90% or 10%.

As a result, the Battery Management System (BMS) has difficulty estimating the true state of charge. Without regular calibration, this can lead to sudden and unexpected power loss.

Charging to 100% provides a clear reference point, allowing the BMS to recalibrate and maintain accurate range estimates. Tesla recommends doing this at least once per week.

③ Practical Tips｜How to Use LFP Batteries Safely ⚡

• ✅ Daily 100% charging is safe
• ✅ Charge to full at least once a week
• ✅ Ideal for home charging environments

Unlike NMC batteries, LFP batteries are designed for frequent full charges.

④ Why This Matters｜Common Misconceptions 🤔

Many EV owners believe that charging above 80% always causes degradation.
This is true for NMC batteries, but not for LFP batteries.

LFP chemistry offers higher durability and longer cycle life, making full charging part of normal operation.

⑤ Summary｜LFP + Home Charging Is a Perfect Match 🏠

Tesla RWD models with LFP batteries offer:

• Peace of mind with daily 100% charging
• Long-term durability with minimal degradation
• Excellent practicality for daily use

With proper understanding, LFP batteries can deliver a stress-free and efficient EV experience.

⑥ Social Proof 📣

This topic has gained significant attention on X, with many users saying
“I wish I knew this before delivery.”

【知っておきたい：テスラRWDを100％充電しないといけない意外な理由とは？】

2021年以降に納車されたモデル3やモデルYのRWD（後輪駆動）モデル。その心臓部である「LFPバッテリー」には、これまでの電気自動車の常識を覆す特性があります。… pic.twitter.com/mmydCLVLTv

— MODUFY - TESLA Sidekicks (@modufy_official) January 27, 2026