CYGNUS 1 >Connect to diesel gensets <15 kVA

Product Overview

The ‘All New’ Cygnus® 1 is the most compact model in the Cygnus® range, manufactured to a robust rental specification.

Available with LFP or AGM storage technologies providing up to 8 kWh of energy storage. Cygnus® 1 is ideally suited for use with diesel generators of up to 15 kVA, managing load spikes of up to 2.8 kVA without triggering auto start of the diesel generator.

Cygnus® 1 delivers truly silent power, without interruption to the surrounding environment; mitigating noise disturbance to local wildlife and neighbouring building occupants. Providing silent emission-free power, up to 250 tonnes of CO2 emissions potentially can be saved over the product lifetime of Cygnus® 1.

Unique to the Cygnus® 1 is the Hybrid LED eTowerlight option that transforms this hybrid power system into a highly efficient, silent lighting solution that can also deliver AC power.

As with all Firefly hybrid power systems, Cygnus® 2 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 1 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 1, up to 250 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® 1 can be specified at point of purchase with Firefly’s Solar-Pack™, which allows Cygnus® 1 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® 1 applications are not limited to, but include silent power for:

  • Security lighting
  • CCTV
  • IT equipment
  • Monitoring equipment

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 Door


  • 32 A CEE Form and Busbar Wiring Options
  • Binding Posts for Remote Generator Start/Stop


  • Digital Timer
  • Forklift Pockets and Lift & Drag Skid
  • Compact Design


  • Built to ISO:9001 Quality Management System
  • Premium Quality Components
  • Rental Specification
  • IP55 Rated Toughened 2mm Zintec Steel Canopy



Cygnus® 1 is available in two configuration options:

  • LFP (Lithium Iron Phosphate)
    Storage with 8 kWh and 4 kVA power output.
  • AGM (Absorbent Glass Mat)
    Storage with 6 kWh and 3.5 kVA power output.

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

Technical Downloads

Hire / Purchase

Cygnus® 1 can be hired from our extensive partner network across Europe. Click here to find a hire partner. Hire today – click here

Alternatively Cygnus® 1 can be purchased directly from the manufacturer, give us a call or drop us a line using the details below: +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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