CYGNUS® 3 >Connect to diesel gensets <100 kVA

Product Overview

The ‘All New’ Cygnus® 3. The most popular silent hybrid power system, reinvented.

Featuring a host of additional upgrades to enable seamless process automation, Cygnus® 3 uniquely features SWITCH technology between Three Phase Support and L1 Support Only modes. Cygnus® 3 is the most versatile, dependable hybrid system of its kind on the market.

With up to 65 kWh of energy storage, Cygnus® 3 is available with LFP or AGM storage technologies. Ideally suited for use with diesel generators of up to 100 kVA, Cygnus® 3 manages load spikes of up to 16.8 kVA without triggering auto start of the diesel generator.

Used by many of Europe’s leading plant hire companies, Cygnus® 3 sets the standard in hybrid power for temporary applications, providing completely silent power and can save up to 720 tonnes of CO2 emissions over its lifetime.

Cygnus® 3 is a cost effective and eco-friendly addition to any fleet, delivering fast returns for hire operators and significant savings in both fuel and on-site emissions for end users.

As with all Firefly hybrid power systems, Cygnus® 3 works seamlessly with GLOW RFM® cloud platform to allow control, diagnostics and reporting from anywhere in the world.

Applications and Benefits


Whilst connected to a diesel generator, Cygnus® 3 provides base load management, reducing the runtime of the diesel generator. As a result, noise, CO2 , NOx and PM are significantly reduced. Over the product lifetime of Cygnus® 3, up to 720 tonnes of CO2 emissions potentially can be saved.

In addition, the frequency of servicing the diesel generator is reduced, whilst also providing back-up power in the event of generator breakdown.


Cygnus® 3 can be specified at point of purchase with Firefly’s Solar-Pack™, which allows Cygnus® 3 to operate in stand-alone mode using the Solar PV arrays supplied as the primary power support. Providing a truly silent 24 hour operation with zero emissions.

Optionally a diesel generator can also be connected as a back-up power source.


Cygnus® 3 applications are not limited to, but include silent power for:

  • Site Compounds
  • Perimeter Lighting
  • Drying Rooms
  • Welfare Facilities
  • Utilities
  • Infrastructure
  • Telecoms

Learn more about the applications and benefits for your sector by following the links below.

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  • Variable RCD Earth Fault Protection
  • MCB Over Current Protection
  • Limit Switch – Cuts power if access door is opened
  • Emergency Stop 
  • Lockable Service Doors
  • Lockable Control Panel Door


  • GLOW RFM® 
  • 63 A CEE Form 3 Phase
  • 125 A CEE Form 3 Phase
  • Busbar Wiring Options
  • 16 A Maintenance Charge Circuit
  • Binding Posts for Remote Generator Start/Stop


  • Digital Timer
  • Reinforced Forklift Pockets
  • Lift and Drag Skid
  • Rotating Lifting Ring
  • Compact Design


  • Built to ISO:9001 Quality Management System
  • Premium Quality Components
  • Rental Specification
  • IP55 Rated Toughened 2.5mm Zintec Steel Modular Canopy



Cygnus® 3 is available in three configuration options:

  • LFP (Lithium Iron Phosphate)
    Storage with 50 kWh and 24 kVA power output.
  • LFP (Lithium Iron Phosphate)
    Storage with 65 kWh and 24 kVA power output.
  • AGM (Absorbent Glass Mat)
    Storage with 50 kWh and 24 kVA power output.

Learn more about our storage technologies and which one is right for you here.

Technical Downloads

Hire / Purchase

Cygnus® 3 can be hired from our extensive partner network across Europe. Click here to find a hire partner. Hire today – click here

Alternatively Cygnus® 3 can be purchased directly from the manufacturer, give us a call or drop us a line using the details below:

[email protected] +44 (0)800 091 4090

All Cygnus® models are sold with a comprehensive 5-year Firefly warranty as standard, view our warranty page for further information.


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