Model 3/Y 82 kWh Panasonic (US): frequent module imbalance

Symptoms

• Rapid growth of imbalance between groups, prolonged balancing, reduced available power/charge.

Solutions

• Replace the defective module or the entire pack.
• Upgrade/replace with LG 79 kWh (EU/China) — a more stable option per shop practice.

Belarus budget

≈ $1 500–7 000 depending on the scope of work / donor availability.

Links

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Community experience TESLA Belarus

Analysis of 400 000 messages from the TESLA owner's group BELARUS chat — one of the most painful topics.

Step-by-step solution from chat (balancing without replacing modules):

1. Discharge the car below 20%.
2. Find a charger with 5+ kW that doesn't drop the session on pause (NB, EVICA in Minsk).
3. Start Battery Test via Service Mode.
4. Wait 12-18 hours — the BMS balances the cells.
5. Repeat once every six months as prevention.
6. Do NOT use CCS for the test — only slow charging (Type 2 / Wall Charger).

Who reported the issue: Сергей, Shark Dark, Vitali K, AleXXXiz

Who found the fix: Pasha n1claus, Zverski, SΞDΞK, Alex Bor, Stinger

Discussion in Telegram: #259300, #298551, #403809

Additional sources:

• Tesla BMS Calibration Guide: https://ev-inventory.com/guide/tesla-bms-calibration.php
• How To Recalibrate Your Tesla Battery (InsideEVs): https://insideevs.com/news/516137/recalibrate-tesla-battery-range/