Battery Evacuation Lifts for Safer Commercial Buildings

A mains failure can turn an otherwise reliable passenger lift into an unavailable asset within seconds. For buildings where lift access is integral to an evacuation plan, battery evacuation lifts can provide a controlled, resilient response – but battery backup alone does not make a lift suitable for evacuation use.

For facilities managers, designers and responsible persons, the key question is not simply whether a lift will move when the power fails. It is whether the entire lift installation, its electrical supply, communications, fire strategy and operating procedures are designed to support safe evacuation in a defined emergency scenario.

What are battery evacuation lifts?

The term battery evacuation lifts is commonly used to describe lift systems that retain a degree of operation following loss of the normal mains supply. Depending on the design, batteries may support a controlled journey to a nominated floor, enable doors to open for passenger release, or provide temporary power for continued operation under a managed evacuation procedure.

There is an important distinction between automatic rescue and evacuation. An automatic rescue device, often known as an ARD, is intended to prevent passengers becoming trapped following a power failure. It typically moves the car to the nearest suitable floor, opens the doors and takes the lift out of service. This is a valuable safety feature, but it is not the same as an evacuation lift.

An evacuation lift is a specifically designed and managed lift installation that may be used to assist people in leaving a building during an emergency, particularly those who cannot use stairs independently. Its specification must align with the building’s fire strategy and the relevant standards, including the principles set out in BS EN 81-76. The lift must remain protected from hazards that could compromise its safe use, such as smoke, water ingress or loss of communications.

Why backup power is only one part of the system

A battery is only as useful as the system it supports. Lift motors require significant power, particularly during starting and acceleration, and the available capacity must be assessed against the lift’s duty, travel distance, rated load and number of anticipated journeys. A small battery arrangement that can release trapped passengers may be entirely unsuitable for repeated evacuation runs.

In many commercial projects, a dedicated secondary electrical supply, generator or appropriately sized uninterruptible power supply is considered alongside battery support. The chosen arrangement must provide sufficient power for the agreed evacuation operation, including car lighting, door operation, alarm systems and two-way communications. It may also need to serve more than one lift, although the number of lifts permitted to operate simultaneously will be dictated by the available supply and evacuation plan.

The lift shaft, landing entrances, machine space or control cabinet and electrical routes also require consideration. A protected electrical supply will not resolve the risk of smoke entering the shaft, water from firefighting activities affecting equipment, or a lift car arriving at a compromised floor. These risks are why evacuation lift design cannot be separated from the wider fire-engineering strategy.

Where an evacuation lift may be appropriate

Evacuation lifts are particularly relevant in buildings where phased or assisted evacuation is needed. This can include healthcare environments, public buildings, education campuses, hotels, offices, transport-related premises and high-occupancy commercial developments. They can support a more inclusive approach for visitors, staff and occupants with reduced mobility without relying on informal or unsafe manual carrying arrangements.

The case for an evacuation lift is strongest where the building’s evacuation strategy identifies people who may need assistance to leave upper or lower floors. However, the appropriate solution varies. In some buildings, a protected refuge and managed assisted evacuation process may form part of the plan. In others, a dedicated evacuation lift with a defined operating mode and trained staff may be required.

A lift intended for firefighters is not automatically suitable for evacuation, and a standard passenger lift with emergency lowering is not automatically suitable for either purpose. Each function has different operational requirements. Early coordination between the architect, fire engineer, M&E consultant, lift specialist and building operator is essential, especially on refurbishment schemes where the existing shaft and electrical infrastructure may impose constraints.

Specifying battery evacuation lifts in new and existing buildings

For a new development, evacuation lift requirements should be established before the lift package is finalised. Decisions about shaft protection, lobby arrangements, drainage, electrical supplies, communications and controls are far more effective when incorporated into the design rather than added after construction has progressed.

The lift specification should define the intended emergency mode in clear terms. This includes who will operate the lift, which floors it will serve, whether the car will be used for one-way downward evacuation or return journeys, how priority calls are managed and what happens if a fault is detected. Controls should prevent normal passenger use from interfering with the evacuation process.

In an existing commercial building, modernisation can be an opportunity to improve resilience. A traction lift may be upgraded with a modern controller, monitored battery arrangement, improved car and landing communications, and more reliable door equipment. Hydraulic lifts may need a different assessment because pump operation can impose a greater demand on backup power. Neither arrangement should be assumed suitable without a detailed calculation and site survey.

Retrofitting may also reveal limitations that cannot be solved at lift level alone. For example, the incoming electrical capacity may be insufficient, the shaft may not provide the required protection, or the building’s fire strategy may need review. A responsible recommendation identifies these issues openly rather than presenting a battery installation as a universal answer.

Questions to resolve before purchase

Before selecting equipment, the project team should establish the following:

• the emergency scenarios in which lift operation is expected;
• the number of occupants likely to require assisted evacuation;
• the lift journeys and operating time required from the secondary power source;
• the protection and monitoring needed for the shaft, landing areas and power supply; and
• the trained personnel, communication arrangements and testing regime required once the building is occupied.

These decisions should be documented within the building’s fire strategy and operating procedures. They must not sit solely within the lift contractor’s specification.

Controls, communication and human oversight

An evacuation lift is an active part of an emergency response, not a passive piece of equipment. Clear controls are needed so authorised personnel can take command of the lift. Depending on the design, this may include a dedicated evacuation control switch, priority operation, status indication and interfaces with the fire alarm system.

Reliable two-way communication is equally important. Passengers and operators must be able to contact an appropriate response point, and the communication system needs to remain operational during the power conditions for which the lift is designed. Mobile signal inside a lift car should never be treated as the only communication measure.

Staff training matters as much as equipment. Building teams need to understand when the lift can be used, when it must not be used, how to communicate with occupants and how to recognise a fault condition. Procedures should also address absence, shift changes and contractor presence, rather than assuming a particular trained person will always be available.

Inspection, testing and maintenance requirements

Battery-backed systems need planned maintenance that goes beyond routine lift servicing. Batteries deteriorate with age, temperature and charging conditions. Their condition may appear satisfactory during normal operation yet prove inadequate when asked to support a prolonged emergency duty.

Maintenance should include inspection of battery condition, charging equipment, terminals, monitoring alarms and recorded test results. The backup-power test must reflect the intended operating duty as far as it can be done safely and without disrupting the building. A simple check that the car lights remain on is not evidence that the system can perform its evacuation role.

Testing should also cover the wider sequence: loss of normal supply, changeover to secondary power, operation of controls, door function, communication, recall or evacuation mode, and return to normal service. Any test needs to be coordinated with the building manager so that occupants, security teams and other contractors understand what is taking place.

Records are essential. They provide assurance for the responsible person, help identify declining battery performance and give maintenance engineers a clear history of faults, replacements and operational tests. Where the lift’s role has changed following refurbishment or a new tenancy, the evacuation plan and test regime should be reviewed rather than carried forward unchanged.

A practical route to a dependable solution

The most effective battery evacuation lift arrangements begin with the building, not the battery. Establish the evacuation strategy, identify the people and journeys the lift must support, then assess the shaft, power supply, controls and operational management required to deliver that strategy.

For organisations managing complex or ageing lift installations, an independent, site-specific assessment can clarify whether modernisation is viable or whether wider building works are needed. Swallow Lifts can support commercial clients with lift surveys, modernisation planning, installation and ongoing maintenance aligned to the building’s operational requirements.

A well-designed evacuation lift gives building teams a planned option when circumstances are already demanding. The goal is not to promise operation in every emergency, but to provide a clearly defined, tested and competently managed means of helping people leave the building safely when the agreed conditions allow it.