Product Overview

Summary: This SOP provides a clear, step‑by‑step framework for the safe installation, operation and maintenance of mobile battery systems fitted to work vehicles across Australian workplaces. It helps businesses manage electrical and fire risks, protect workers in the field, and demonstrate compliance with WHS duties when using auxiliary and high‑capacity battery systems on utes, service vehicles and mobile plant.

Mobile battery systems in work vehicles – from dual battery setups to high‑capacity lithium systems powering tools, inverters and communications equipment – are now standard in many Australian fleets. However, poor design, incorrect installation or inadequate maintenance can create serious electrical, fire and explosion risks, particularly when vehicles operate in remote, hot or harsh conditions. This Safe Operating Procedure provides a structured, practical method for planning, installing, operating and maintaining mobile battery systems so they are safe, reliable and compliant with Australian WHS requirements.

The document guides businesses through the full lifecycle of these systems: from pre‑installation risk assessment and selection of compliant components, through to correct cabling, fusing, mounting and ventilation, and on to routine inspection, fault reporting and end‑of‑life management. It addresses common issues such as overloading circuits, unsafe modifications, damage from vibration, incorrect charging arrangements and unsafe use of portable power in and around vehicles. By implementing this SOP, organisations can significantly reduce the likelihood of vehicle fires, electric shock, battery failures and costly downtime, while providing workers with clear instructions and training material that align with Australian Standards and manufacturer requirements.

Key Benefits

• Ensure mobile battery systems are installed, operated and maintained in line with WHS obligations and relevant Australian Standards.
• Reduce the risk of vehicle fires, battery thermal runaway and electric shock incidents in work vehicles.
• Standardise installation practices across fleets, reducing ad‑hoc wiring, unsafe modifications and workmanship variability.
• Extend the service life and reliability of mobile battery systems through structured inspection, testing and maintenance.
• Support clear worker training, pre‑start checks and emergency response specific to battery‑powered work vehicles.

Who is this for?

• Fleet Managers
• Workshop Managers
• Auto Electricians
• Field Service Technicians
• WHS Managers and Advisors
• Operations Managers
• Construction and Mining Supervisors
• Utilities and Infrastructure Supervisors
• Local Government Fleet Coordinators

Hazards Addressed

• Electric shock from exposed, damaged or incorrectly terminated conductors
• Vehicle fires caused by short circuits, over‑current, incorrect fusing or poor cable routing
• Thermal runaway and explosion risks from lithium and other high‑capacity batteries
• Burns from contact with hot battery components or arcing during connections
• Toxic or corrosive exposure from leaking or venting batteries
• Trip and entanglement hazards from poorly secured cables and accessories
• Crush or impact injuries during battery lifting, mounting or removal
• Manual handling injuries from handling heavy batteries and associated equipment
• Ignition of flammable atmospheres when vehicles operate in hazardous areas
• Environmental contamination from improper disposal of batteries and associated components

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Abbreviations
• 3.0 Applicable Legislation, Standards and Guidance
• 4.0 Roles and Responsibilities
• 5.0 Competency, Licensing and Training Requirements
• 6.0 System Overview – Types of Mobile Battery Systems in Work Vehicles
• 7.0 Hazard Identification and Risk Assessment for Vehicle Battery Systems
• 8.0 Pre‑Installation Planning and Design Requirements
• 9.0 Installation Procedure – Mounting, Cabling, Fusing and Ventilation
• 10.0 Integration with Vehicle Electrical Systems and Accessories
• 11.0 Commissioning, Testing and Verification
• 12.0 Safe Operating Procedures for Workers and Drivers
• 13.0 Charging Practices (On‑board, External and Solar) and Load Management
• 14.0 Inspection, Preventive Maintenance and Testing Schedule
• 15.0 Fault Identification, Isolation and Reporting
• 16.0 Emergency Procedures – Fire, Electric Shock, Battery Failure and Spills
• 17.0 Working in Remote, Hot or Hazardous Environments
• 18.0 Manual Handling and Safe Battery Replacement
• 19.0 Labelling, Signage and Documentation Requirements
• 20.0 Environmental Management and End‑of‑Life Battery Disposal
• 21.0 Review, Audit and Continuous Improvement of the Procedure
• 22.0 Document Control and Recordkeeping

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS Acts
• Work Health and Safety Regulations 2011 and state/territory equivalents
• Safe Work Australia – Managing Electrical Risks in the Workplace Code of Practice
• Safe Work Australia – Managing the Work Environment and Facilities Code of Practice
• AS/NZS 3000: Electrical installations (Australian/New Zealand Wiring Rules)
• AS/NZS 3011: Secondary batteries installed in buildings
• AS/NZS 2676: Guide to the installation, maintenance, testing and replacement of secondary batteries in buildings
• AS/NZS 4509: Stand-alone power systems
• AS/NZS 4763: Portable inverters
• AS/NZS 3820: Essential safety requirements for electrical equipment
• Manufacturer installation and maintenance instructions for specific battery and charging systems