APTA BTS-BS-RP-007-26
Out-of-Service Storage of Vehicles with High-Voltage Lithium-Ion Energy Storage Systems
Abstract
This recommended practice provides guidance to bus transit agencies for storing transit vehicles equipped with high-voltage lithium-ion batteries—including battery electric, hybrid electric and fuel cell electric vehicles—when not in normal service operation. It outlines procedures for short-term, long-term and decommissioned storage to maintain safety, extend battery life and minimize risks. This recommended practice does not apply to routine daily parking or to vehicles in the active service pool.
Keywords: battery bus fire, battery electric bus, electric bus, fuel cell electric bus, hybrid bus, hybrid electric bus, fuel cell bus, high-voltage battery, lithium-ion, safety, storage procedure, thermal event
Summary
This recommended practice establishes guidance for the safe out-of-service storage of vehicles equipped with high-voltage lithium-ion batteries. It addresses three key storage phases: short-term storage (less than approximately one month), long-term storage (one month to approximately 12 months) and decommissioning (more than approximately 12 months). This document emphasizes the importance of correct state of charge, environmental conditions and safety practices to minimize degradation and reduce fire risk. Agencies are encouraged to adapt this recommended practice to their unique fleets, facilities and regulatory environments while integrating OEM-specific requirements. This document should be used in conjunction with appropriate procedures for handling damaged or malfunctioning high-voltage lithium-ion batteries and vehicles.
Document History
| Document Number | Version | Publication Date | Publication | Related Information |
|---|---|---|---|---|
| APTA BTS-BS-RP-007-26 | Original | 05/12/2026 | Published | Current |
Get Involved
Want to participate in the development of this document? Join a Working Group or Learn More