Specialty VehiclesNovember 8, 2025

EV Roadside Service: Range Depletion and the Small 12V Battery

Out-of-charge EVs require towing. But most EV roadside calls are actually 12V battery problems.

5 min read

Electric vehicles have unique roadside scenarios. Range depletion (running the battery to zero) requires a tow to a charging station. There's no roadside fix — the only solution is charging.

Tesla, Mustang Mach-E, Rivian, F-150 Lightning, and other EVs also have a small 12V battery that runs the computers and door electronics. When the 12V dies (common in Teslas with sentry mode), the doors won't open, the touchscreen is dark, and the vehicle is effectively bricked. Jump-starting the 12V fixes it.

Out-of-charge tows are typically to the nearest charging station — Supercharger for Teslas, Electrify America for many other EVs, EVgo, ChargePoint, etc. Confirm before the tow that the destination charger is operational.

Tesla owners specifically: sentry mode drains the 12V faster than the DC-DC converter can replenish. If you use sentry mode constantly, expect 12V replacement every 2–3 years instead of 4–5.

Most modern EVs have a 12V jump point clearly marked in the frunk (front trunk) or under a panel. Our techs are familiar with the procedures for major EV brands.

Quick Tips

  • EV won't unlock or start = 12V battery, not traction battery
  • Out-of-charge requires tow to charging station — no roadside fix
  • Sentry mode on Teslas accelerates 12V battery wear
  • Carry a small 12V jump pack — works on EVs same as gas cars
  • Confirm charging station is operational before tow

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