Mainstream sells 675 MW of wind and solar projects to Celsia in Colombia

Mainstream Renewable Power sold its entire Colombian portfolio to Celsia, marking its exit from the country to focus operations on three strategic markets.

Share:

Comprehensive energy news coverage, updated nonstop

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access • Archives included • Professional invoice

OTHER ACCESS OPTIONS

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

FREE ACCOUNT

3 articles offered per month

FREE

*Prices are excluding VAT, which may vary depending on your location or professional status

Since 2021: 35,000 articles • 150+ analyses per week

Mainstream Renewable Power, a company specialised in wind and solar energy and majority-owned by Aker Horizons ASA, has completed the sale of a 675 megawatt (MW) portfolio of projects in Colombia to Celsia, the energy subsidiary of local conglomerate Argos Group. The announcement was made on April 22 via press release. The transaction marks Mainstream’s complete exit from the Colombian market.

A portfolio of five projects under development

The divested portfolio includes five projects currently under development: three solar power plants and two wind farms. These are the Andromeda (100 MW), Aries (175 MW), and Pollux (100 MW) solar projects, as well as the Neptuno and Sirius wind farms, each with a capacity of 150 MW. The projects have been in development since 2019. No financial details of the transaction were disclosed.

Celsia thus strengthens its presence in the Colombian renewable energy sector, where it already operates hydroelectric, solar and thermal assets. The company stated that the acquisition aligns with its domestic growth strategy in the non-conventional energy segment.

Mainstream’s strategic shift

For Mainstream Renewable Power, this sale reflects a revised strategy aimed at concentrating resources in three core markets deemed a priority: South Africa, Australia and the Philippines. The company said it intends to generate value through stronger project execution, a streamlined cost structure, and optimised capital management.

“This transaction illustrates our commitment to disciplined capital allocation and efficient investment recycling,” the company’s management stated in the release, without giving further details on the exit process.

Development capacity redeployed to other markets

According to available information, the divested portfolio did not include any assets in the operational or advanced construction phase. The sale is expected to allow Mainstream to reallocate human and financial resources to higher projected return projects in its target markets.

Mainstream Renewable Power currently operates over 1.4 gigawatts (GW) of projects under construction or in operation worldwide and is developing a global pipeline of 20 GW.

German manufacturer Nordex has signed three orders with DenkerWulf for 25 onshore wind turbines, with a total capacity of 122.7 MW to be installed between 2027 and 2028 in northern Germany.
RWE won two projects totalling 21.6 MW in the latest onshore wind tender by the CRE, strengthening its presence in Oise and Morbihan and consolidating its investments in France.
Danish group Cadeler has signed two contracts for the transport and installation of offshore wind turbine foundations and units worth a combined €500mn, subject to a final investment decision by the client.
Shell withdraws from two floating wind projects in Scotland, reinforcing capital discipline in favour of faster-return activities. ScottishPower takes over MarramWind while CampionWind is returned to Crown Estate Scotland for reallocation.
J-POWER will take over Mitsubishi Heavy Industries’ domestic onshore wind maintenance operations under a deal set to strengthen its local market position by spring 2026.
The consortium brings together Air Liquide, RTE, Nexans, ITP Interpipe and CentraleSupélec to develop a demonstrator for offshore electricity transport using superconducting cables cooled with liquid nitrogen.
Developer Q ENERGY has inaugurated a seventh wind farm in Biesles, Haute-Marne, with Velto Renewables acquiring a 50% ownership stake.
French start-up Wind fisher unveils a pioneering airborne wind system capable of producing twice as much electricity as a ground-based turbine by tapping into powerful winds above 300 metres.
The Canadian energy producer led the tenth wind tender launched by the CRE, with two projects representing 13% of the allocated capacity, strengthening its strategic position in the French market.
The European Commission has selected BW Ideol’s Fos3F project for a grant of up to €74mn, targeting the construction of a concrete floater plant for floating wind turbines at the industrial site of Fos-sur-Mer.
Canadian company Boralex reported a net loss of CAD30mn in the third quarter, impacted by lower electricity prices in France and adverse weather conditions in North America.
Energiekontor has closed financing for three new wind farms in Germany, strengthening its project portfolio and reaching a historic construction milestone in the 2025 fiscal year.
RWE has finalised installation of all 44 foundations at the Nordseecluster A offshore site in the North Sea, a key milestone before planned maintenance activities leading up to 2027 on this 660-megawatt project.
A pilot project backed by the state aims to modernise electricity transport between offshore wind farms and the mainland grid using superconducting cables cooled with liquid nitrogen.
The Danish wind turbine manufacturer doubled its net profit in the third quarter despite complex market conditions, supported by increased onshore deliveries and order growth.
Danish offshore wind giant Ørsted reported a net loss of 1.7 billion kroner in the third quarter, despite a $9.4 billion recapitalisation aimed at strengthening its balance sheet and stabilising operations.
Norway's energy regulator has rejected an application to build a wind farm in the northern Finnmark region due to potential environmental impacts and threats to Indigenous Sami culture.
Danish Ørsted has signed an agreement with Apollo to sell a 50% stake in its Hornsea 3 offshore wind farm in the UK, in a strategic transaction valued at approximately DKK 39 billion ($5.43bn).
Eneco takes over Prowind’s wind project development business in the Netherlands, adding 260 MW to its portfolio. Prowind refocuses on the German market, where demand is growing rapidly.
The Chinese wind turbine manufacturer and Saudi operator sign a seven-year framework agreement to deploy local production lines and enhance technological cooperation in several strategic markets.

All the latest energy news, all the time

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access - Archives included - Pro invoice

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

*Prices shown are exclusive of VAT, which may vary according to your location or professional status.

Since 2021: 30,000 articles - +150 analyses/week.