Norway’s Aker Horizons acquires 75% stake in Mainstream Renewable Power

Facebook
Twitter
LinkedIn
Reddit
Email
Mainstream’s 145MW Rio Escondido solar park under construction in Chile. Image: Mainstream Renewable Power.

Norwegian investment company Aker Horizons has acquired a 75% interest in Mainstream Renewable Power, valuing the solar and wind project developer at €1 billion.

Mainstream said the agreement paves the way for a “rapid acceleration” of its global expansion plans to bring 5.5GW of solar and wind assets to financial close by 2023. The company has a development pipeline of around 10GW, including large-scale solar projects in Chile – where it recently closed a US$280 million finance facility – and South Africa.

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Under terms of the agreement, the company will continue to operate as Mainstream, led by CEO Mary Quaney. Eddie O'Connor, an Irish businessman who founded Mainstream in 2008, will remain chairman and retain a minority interest in the business.

It was also announced that an initial public offering of Mainstream is planned to take place within the next two to three years.

“This partnership is the crucial next step in the vision we set out for Mainstream in 2008 to lead the global transition to renewable energy and rid the world of CO2 emissions,” O'Connor said. “It means we can widen our scope for entry into new markets and further deepen and expand our leadership position in existing ones.”

Aker Horizons, which is owned by industrial investment company Aker ASA, said the acquisition will enable the firm to accelerate the development of a global position within green energy.

“Mainstream's role as a pioneer in renewables and its strong entrepreneurial culture is a good fit as we carve out our path forward in the energy transition. Through the acquisition of Mainstream, Aker Horizons will gain a platform to drive forward its plans in renewable energy and position itself in a growing market for hybrid projects,” said Kristian Røkke, CEO of Aker Horizons.

As part of the transaction, Aker Horizons will also acquire a 50% holding in SuperNode, a company founded by Eddie O’Connor in 2018 that designs and develops superconductor cables to address the future need for higher capacity cables with lower power loss.

The Mainstream acquisition is expected to close in the second quarter of 2021.

21 May 2025
London, UK
The Renewables Procurement & Revenues Summit serves as the European platform for connecting renewable energy suppliers to the future of energy demand. This includes bringing together a community of European off-takers, renewable generators, utilities, asset owners, and financiers. The challenges ahead are complex, but through collaboration, innovation, and a shared vision, we can navigate uncertainties and forge a sustainable energy future. Let us harness our collective knowledge to advance the renewable energy agenda.
25 November 2025
Warsaw, Poland
Large Scale Solar Central and Eastern Europe continues to be the place to leverage a network that has been made over more than 10 years, to build critical partnerships to develop solar projects throughout the region.

Read Next

Premium
April 17, 2025
As Europe readjusts to a new geopolitical uncertainty, PV Tech asks what impact the continent's solar industry might feel.
April 17, 2025
Catalyze has secured US$85 million in tax equity investment to support the construction of 75MW of distributed solar projects in the US.
April 16, 2025
US residential solar company Complete Solaria will change its name to SunPower, resurrecting the name of one of the US' longest-running solar companies which folded last year.
April 16, 2025
Europe completed power purchase agreements (PPAs) for 1.6GW of renewable energy capacity in March, according to Pexapark.
April 16, 2025
The world invested US$300 million into the off-grid solar sector in 2024, a 30% year-on-year decline in total funding, according to GOGLA.
April 15, 2025
Renewable energy will need policy support to reach “economically optimal” levels for the global energy transition, according to BloomberNEF.

Subscribe to Newsletter

Upcoming Events

Media Partners, Solar Media Events
April 23, 2025
Fortaleza, Brazil
Solar Media Events
April 29, 2025
Dallas, Texas
Media Partners, Solar Media Events
May 7, 2025
Munich, Germany
Solar Media Events
May 21, 2025
London, UK
Solar Media Events
June 17, 2025
Napa, USA