Electric Vehicle Towing Considerations: Safety and Method Requirements

Electric vehicles present a distinct set of mechanical and safety challenges that differ fundamentally from those posed by internal combustion engine vehicles during towing operations. The high-voltage battery systems, regenerative braking architectures, and permanent-magnet motor configurations found in EVs require specific handling methods that, when applied incorrectly, can result in battery thermal events, drivetrain damage, or voided manufacturer warranties. This page covers the core mechanics of EV towing, the classification boundaries between acceptable and prohibited methods, and the operational factors that towing operators and fleet managers must account for across different vehicle types and battery chemistries.

• Definition and Scope
• Core Mechanics or Structure
• Causal Relationships or Drivers
• Classification Boundaries
• Tradeoffs and Tensions
• Common Misconceptions
• Checklist or Steps
• Reference Table or Matrix

Definition and Scope

EV towing, in the operational sense used by the towing industry, refers to the movement of a battery-electric vehicle (BEV) or plug-in hybrid electric vehicle (PHEV) that is either inoperable, involved in a collision, or otherwise unable to be driven under its own power. The scope of EV-specific towing considerations extends beyond simple vehicle recovery — it encompasses battery state management, motor disengagement protocols, and equipment compatibility requirements that do not apply to conventional internal combustion engine (ICE) vehicles.

The category includes passenger BEVs (such as those built on dedicated EV platforms), PHEVs with electric drive capability, and commercial electric vehicles including Class 3–8 electric trucks and transit buses. Each subcategory presents different voltage thresholds, weight profiles, and manufacturer-specified transport requirements. For a foundational understanding of how automotive towing services are categorized more broadly, the National Towing Authority provides classification context across all service types.

The National Highway Traffic Safety Administration (NHTSA) and the Society of Automotive Engineers (SAE) have both issued guidance addressing high-voltage vehicle handling in post-collision and recovery scenarios, though no single federal statute as of the date of this publication mandates a uniform EV towing protocol across all states.

Core Mechanics or Structure

The primary mechanical distinction between an ICE vehicle and a BEV during a tow is the behavior of the electric drivetrain under passive wheel rotation. In most BEVs, the electric motor is directly coupled to the driven axle with no traditional transmission disconnect. When the wheels on the driven axle rotate — as they do during a two-wheel tow — the motor acts as a generator. This back-electromotive-force (back-EMF) phenomenon can push current into a battery pack that is not designed to receive uncontrolled charge at that rate, particularly if the battery is already at high state-of-charge (SOC).

High-voltage battery packs in passenger EVs typically operate in the 300–800 volt DC range. The 800-volt architecture, adopted by manufacturers including Porsche (Taycan) and Hyundai (Ioniq 5), requires specialized high-voltage personal protective equipment (PPE) rated for Class 0 electrical hazards, per NFPA 70E 2024 edition guidelines, when first responders or tow operators interact with damaged systems.

Thermal runaway is the most severe risk associated with improper EV handling. In a lithium-ion cell, thermal runaway is a self-reinforcing exothermic reaction triggered by internal short circuit, mechanical damage, overcharge, or excessive discharge. Once initiated, individual cells propagate the reaction to adjacent cells. The National Fire Protection Association (NFPA) 855 standard addresses fixed installation energy storage systems, and NFPA 1 contains provisions relevant to vehicle fires, but neither provides a comprehensive towing-specific protocol. SAE J2990 addresses hybrid and electric vehicle rescue operations and is the primary technical reference for operator training in this area.

Permanent magnet synchronous motors (PMSMs), used in the majority of production EVs, cannot be fully deactivated without physically disconnecting the high-voltage system. Unlike older induction motor designs, PMSMs generate voltage whenever the rotor moves, even when the vehicle is powered off.

Causal Relationships or Drivers

Three primary causal factors drive the complexity of EV towing relative to ICE vehicle towing:

Battery architecture and chemistry. Lithium iron phosphate (LFP) cells, used by manufacturers including Tesla in their standard-range vehicles and BYD across product lines, are thermally more stable than nickel manganese cobalt (NMC) chemistries but are not immune to thermal runaway under mechanical deformation. The specific chemistry determines both the risk profile and the coolant system configuration, which may leak during a collision and require hazmat-level response.

Motor coupling configuration. Single-motor rear-wheel-drive (RWD) EVs, dual-motor all-wheel-drive (AWD) EVs, and vehicles with in-wheel hub motors each present different towing constraints. A dual-motor AWD vehicle with no axle disconnect — common in configurations from Tesla, Rivian, and Lucid — typically cannot safely undergo two-wheel towing on either axle without risking motor damage or uncontrolled regenerative activity.

Gross vehicle weight. EV battery packs add substantial mass. The GMC Hummer EV pickup has a curb weight of approximately 9,063 pounds, requiring heavy-duty towing equipment rated beyond standard Class 4 or 5 wrecker capacity. Operators must reference towing capacity and vehicle weight limits guidance before dispatching equipment.

Classification Boundaries

EV towing methods fall into three operational classifications:

Flatbed (wheel-lift free) transport. The only universally accepted method across nearly all manufacturer service manuals. All four wheels are lifted clear of the road surface. No driven axle rotation occurs. This eliminates back-EMF generation and prevents uncontrolled regenerative charging. See flatbed towing explained for equipment and rigging specifics.

Wheel-lift or dolly towing (conditional). Permitted by a subset of manufacturers for their specific models under narrow conditions — typically requiring the vehicle to be in a designated transport mode (sometimes called "Tow Mode" or "Transport Mode" in the vehicle's settings menu), which may disable regen braking and disengage certain motor functions. Even where conditionally permitted, maximum tow speed and distance limits apply. These limits are model-specific and documented in the owner's manual and OEM service documentation.

Neutral tow (driven wheels on ground). Prohibited by the majority of EV manufacturers. Even when the vehicle can be placed in a neutral-equivalent state, the PMSM continues to generate voltage as the wheels rotate. This can damage motor controllers, cause unintended regeneration, or, in a damaged battery scenario, accelerate thermal instability.

PHEVs introduce a fourth boundary condition: some PHEVs have a traditional transmission that permits true neutral with no motor engagement, making standard wheel-lift towing permissible under specific configurations. Operators must verify PHEV drivetrain architecture before selecting method.

Tradeoffs and Tensions

The central tension in EV towing operations is equipment availability versus vehicle safety requirements. Flatbed transport is the standard-safe method, but flatbed units are less prevalent in rural dispatch networks than wheel-lift wreckers. In areas with limited roadside assistance and towing resources, an operator may face pressure to use available equipment rather than waiting for a flatbed.

A secondary tension exists between fire suppression needs and transport decisions. A thermally compromised EV battery may require immersion or extended cooling before the vehicle can be moved safely, yet incident command and traffic management may create pressure for rapid scene clearance. NFPA guidance does not set a fixed mandatory cooling period; local fire authority direction governs.

Manufacturer liability framing creates a third tension. If a tow operator uses a prohibited method and subsequent drivetrain damage or battery degradation occurs, warranty claims may be denied. This creates a financial risk transfer from the OEM to the towing operator or the vehicle owner that is not always disclosed at point of service.

The broader landscape of towing laws and regulations by state does not yet uniformly address EV-specific method requirements, leaving operators to navigate a patchwork of OEM guidance, OSHA general duty clause obligations, and NFPA standards without binding federal harmonization.

Common Misconceptions

Misconception: Placing an EV in "Park" is equivalent to disabling the drivetrain.
Correction: Park mode in a BEV engages a parking pawl or electronic park lock but does not electrically isolate the motor. PMSMs continue to generate voltage if wheel rotation occurs, even in Park.

Misconception: All EVs can be flat-towed (all four wheels on the ground) like some ICE vehicles.
Correction: Flat towing — the method used with many Jeep models and other RWD ICE vehicles — is explicitly prohibited for virtually all BEVs. The continuously engaged motor generates back-EMF through the entire tow distance with no thermal management active.

Misconception: A visually undamaged EV battery is a safe battery.
Correction: Internal short circuits can develop hours or days after a collision with no external battery casing damage. The NFPA and SAE both note that delayed thermal runaway events have occurred 24–48 hours post-incident. Storage of collision-damaged EVs requires separation from other vehicles and structures, as addressed in storage yard and vehicle retrieval operational guidelines.

Misconception: EV towing requires no special operator training beyond standard wrecker certification.
Correction: SAE J2990 and NFPA 70E (2024 edition) both define competency requirements for personnel working near high-voltage vehicle systems. Several states have adopted training requirements for first responders that reference these standards, and the towing industry's own certifying bodies have begun incorporating EV-specific modules into their curricula.

Checklist or Steps

The following sequence reflects the documented operational steps found in OEM service literature and SAE J2990 guidance. This is a reference structure, not an advisory protocol.

Pre-Dispatch Phase
1. Confirm vehicle year, make, model, and drivetrain configuration (RWD, AWD, PHEV, BEV).
2. Verify battery damage status with requesting party — visible damage, smoke, fluid leakage, or post-collision context triggers hazmat and fire authority notification.
3. Confirm flatbed availability; if wheel-lift is the only option, identify whether the specific vehicle model permits conditional dolly towing per OEM documentation.

On-Scene Assessment Phase
4. Establish 30-foot minimum exclusion zone for thermally compromised or post-collision EVs prior to approach.
5. Don PPE appropriate to voltage class — Class 0 insulating gloves minimum for proximity to exposed high-voltage components.
6. Verify vehicle power-off state; note that key fob proximity can inadvertently re-energize some systems.
7. Locate and confirm high-voltage disconnect or service plug status per OEM rescue sheet (available via QR code on most post-2018 EVs or through the NFPA Emergency Field Guide app).

Loading and Securing Phase
8. For flatbed transport: load with driven axle wheels lifting last; secure using manufacturer-approved tie-down points (not suspension components).
9. For conditional wheel-lift: enable OEM-specified Transport Mode before any wheel suspension occurs.
10. Confirm all four corners are secured with rated straps; EV curb weights may exceed ICE equivalents by 20–40%.

Transit Phase
11. Monitor for smoke, unusual odor, or visible battery venting during transport — these require immediate stop and fire authority contact.
12. Adhere to OEM-specified maximum tow speed if applicable (commonly 25–45 mph for conditional wheel-lift configurations).
13. Document transport method and vehicle condition at origin and destination for liability records.

For context on how these operational phases connect to broader service frameworks, the how automotive services works conceptual overview provides structural background applicable across towing service types.

Reference Table or Matrix

References

• SAE International — SAE J2990: Hybrid and Electric Vehicle Rescue Operations
• National Fire Protection Association — NFPA 1: Fire Code (Vehicle Fire provisions)
• National Fire Protection Association — NFPA 855: Standard for the Installation of Stationary Energy Storage Systems
• NFPA 70E: Standard for Electrical Safety in the Workplace (2024 Edition)
• National Highway Traffic Safety Administration (NHTSA) — Electric Vehicle Safety
• Federal Motor Carrier Safety Administration (FMCSA) — Commercial Vehicle Safety
• SAE International — SAE J1766: Recommended Practice for Electric and Hybrid Electric Vehicle Battery Systems Crash Integrity Testing