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

May 9, 2025
Scatec has announced revenues of NOK2.39 billion (US$230 million) and profits of NOK1 billion (US$96 million) in the first quarter of 2025.
May 6, 2025
Building floating PV (FPV) projects on just 10% of the world’s water reservoirs could almost single-handedly meet global electricity demand.
May 6, 2025
The rapidly changing nature of the world’s energy mix has necessitated similarly rapid changes in the solar PPA space.
May 6, 2025
The global solar market will continue to slow in 2025 after 2024 saw the total capacity growth rate decrease by over 50%, according to a report from SolarPower Europe (SPE).
May 2, 2025
The European Commission (EC) has allocated €52 million to nine renewable energy projects as part of its cross-border auction process.
May 1, 2025
US tracker manufacturer FTC Solar has announced a 57.6% quarter-on-quarter increase in revenue in the first quarter of this year.

Subscribe to Newsletter

Upcoming Events

Solar Media Events
May 21, 2025
London, UK
Solar Media Events
June 17, 2025
Napa, USA
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 8, 2025
Asia