The 90 MW power Plant owned by Rabai Power Limited constitutes a significant investment in the future prosperity of Kenya.

The prime movers of the power Plant consists of five 17 MW 18V46 Wärtsilä 4-stroke medium speed diesel engines each coupled to an alternator. The engines provide dependable power production and high availability ensuring optimal Plant performance. The heat energy, a by-product of the engines’ exhaust gases, is utilized to enhance the efficiency of the Plant. Steam generates from the exhaust gas in heat recovery boilers.  This steam is used both for heating requirements associated with fuel oil storage and treatment; and to drive a Steam Turbine Generator (STG), hence improving the overall efficiency of the Plant by increasing the capacity by approximately 8% “free” extra output as a result.


Rabai Power Plant has a total capacity of approximately 90 MW, the major equipment comprising:

  • 5 x Wärtsilä 18V46C reciprocating diesel engines: 17.4 MW, 500 rpm
  • 5 x ABB air-cooled generators: 21.3 MVA, 11 kV
  • 5 x Aalborg (Alfa Laval) Waste Heat Recovery Steam Boilers: 11.8 kg/s, 13.5 bar, 365ºC
  • 1 x Dresser Rand (Peter Brotherhood) Condensing Steam Turbine: 7.85 MW
  • 1 x Bronswerk Air Cooled Condenser:
  • 2 x Areva Step-Up Transformers: 75 MVA, 132/11 kV
  • 3 x 4,500 m3 HFO storage tanks

Our Vision

To be a world class operator of safe, reliable and efficient power Plants.

Our Mission

To provide Kenya with an efficient, reliable, economical and sustainable energy supply, using world class technology that benefits our customers and the environment.

Our Values

  • Safety First
  • Integrity
  • Team work
  • Environmental and Social Responsibility


Burmeister & Wain Scandinavian Contractor A/S, Denmark, and Aldwych International Ltd., United Kingdom, won the electricity supply tender in early 2006.

Originally the power plant should have been situated in the Nairobi area but the construction site was moved to Mombasa.

Major Milestones