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Compact Battery PowerSeat® Ascender

Part No. PWRS-BC

The Compact Battery PowerSeat® ascenders are lightweight portable winches that are used as mechanical ascenders for working at height and other winching applications, including access and rescue.

These compact versions maximize the efficiency of the PowerSeat as a hauling device, while maintaining their functionality as powered ascenders. The seats have been removed and the long stem shortened for significant reductions in weight and size. The user is suspended under the compact unit with full control from below.

Developed as a requirement in industry, the Harken Industrial Battery PowerSeat provides operators with a prolonged usage ascender which accommodates an unlimited length of rope pull.

The PowerSeat can be operated comfortably and confidently in both outdoor and indoor environments where engine emissions are restricted, providing a level of operator safety and comfort that directly increases productivity and efficiency.

Suitable for blade cleaning, confined space and rescue applications.






The Battery PowerSeat has a 50.4V lithium-ion battery with BMS (Battery Management System) to preserve its useful life. Certified to IP54.

PS electric handle




Speed Control

The unit is operated using a fail-safe dead man’s switch to control ascent speed, up to 14 m/min (46 ft/min).

PS Break


The braking system controls descent and provides workers protection against free-falls. The encapsulating jaw cover protects fingers and clothing from catching in the winch.

PS Compact break and frame




Automatic Cut-out

The Compact Battery PowerSeat has a thermal cut-out system within the motor to cut power to the seat when the working load is exceeded.

PS Durability





Stainless steel load-carrying gears and pins provide strength and durability. Sealed gearbox and high-load ball bearings reduce friction under load, are corrosion resistant, and do not require lubrication.






The Harken Industrial PowerSeat is CE certified to the Machinery Directive and independently verified by Bureau Veritas.

Battery life (in optimum conditions) is approximately 550 m (1804 ft) with a 125 kg (276 lb) load.

Ideal for a Wide Range of Applications:

  • Construction
  • Renewable energy
  • Facilities management
  • Vessel maintenance
  • Theatrical
  • Telecommunications
  • Architectural
  • Utilities, Oil and Gas

Product Details

Description Max line speed Weight Rope Ø Max rated load
Min Max
ft/min m/min lb kg in mm in mm lb kN
PWRS-BC Compact battery 46 14 39* 18* 3/8 10 1/2 12.7 660 3


*Plus 3 kg (6.6 lb) for battery.



Max Working Load

Max Ascent Speed

Product Video

Q: Is the PowerSeat just a mechanical ascender?

A: The certification of the PowerSeat allows it to be used as a powered ascender for access, as well as rigged to assist with hauling and pulling. For example, high angle rescue (when attached to an appropriate anchor), or in conjunction with a tripod for confined space/winching operations.

Q: Is the PowerSeat only rated for single person use?

A: Although ideal for one person, the Compact Battery PowerSeat Ascender can also be used in tandem rescue situations to a maximum working load of 300 kg (661.4 lb).

Q: What is the ascent speed?

A: The rate of climb is 15 m per minute at 120 kg (42.2′ per minute at 265.6 lb). 11 m (36.09 ft) per minute at 273 kg (600 lb).

Q: What training is required? Can anyone use the PowerSeat?

A: Use of the PowerSeat must meet the regulations of the nation and industry in which it is used. It is restricted to those certified for temporary work at height with access and positioning systems using ropes.

Q. What battery does the PowerSeat Battery have and how long does the charge last?

A. The PowerSeat battery has a 50.4V lithium-ion battery with a BMS (Battery Management System) to preserve its useful life. Certified IP54. In optimum conditions this has a battery life of 550 m with a 125 kg load.

This is not PPE equipment: Use in conjunction with a full fall arrest system at all times.

Warnings and instructions

The user must follow the manufacturer's instructions for each component of the system.

These instructions must be provided to the user of this equipment. The user must read and understand these instructions before using this equipment.

Manufacturer's instructions must be followed for proper use and maintenance of this equipment.

Alterations or misuse of this equipment, or failure to follow these instructions, may result in serious injury or death.