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:

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 group wpd takes over the teams and a portfolio of 17 wind projects from Calycé, consolidating its position in the French market and expanding its regional presence, particularly in the Grand Est, with the support of Envinergy.
SPIE Wind Connect partners with Van Oord to connect and test 21 high-voltage cables for the Windanker offshore wind farm, marking a key milestone in the development of Germany’s offshore wind sector.
Envision Energy and FERA Australia announce an agreement to develop up to 1 GW of wind and 1.5 GWh of storage on the Australian market, laying the foundation for a new hybrid power plant model.
German group RWE has completed installation of all 100 monopile foundations at Sofia, a 1.4 GW offshore wind farm located 195 kilometres from the British coast, marking a major step in the construction of the project.
Greece’s wind sector reaches a new milestone with 5.5 GW installed, driven by 37 new turbines and €180 mn in investments during the first half of 2025, according to ELETAEN.
Nomura Real Estate has signed a power purchase agreement for its new Tokyo headquarters with wpd and GPSS Group, supplying the Higashi Izu Furusato wind project with a capacity of 7.48 MW.
Energiequelle completes the commissioning of two Enercon E-160 turbines in Raßlitz, replacing previous models and increasing the installed capacity of the Saxony site more than fivefold.
Ørsted has completed a $2.75bn project financing with 25 banks and five export credit agencies for the 632 MW Greater Changhua 2 offshore wind farm in Taiwan, strengthening its industrial partnership strategy. —
Masdar and Iberdrola announce a joint investment of €5.2 billion in the East Anglia THREE offshore wind farm in the United Kingdom and full commissioning of the German Baltic Eagle project (476 MW).
Energiekontor AG has secured contracts for four wind projects with a total capacity of 125 megawatts, following the Federal Network Agency's May 2025 tender in Germany.
Ecopetrol S.A. finalises the acquisition of Wind Autogeneración from Enel S.A.S., thereby taking over the Windpeshi wind project in Colombia, with a planned capacity of 205 MW, aimed at the Colombian oil group's energy self-consumption.
Oceanic Wind Energy Inc. and Coast Tsimshian Enterprises Ltd. secured an exclusive investigative use permit in the Hecate Strait, paving the way for Canada's first major offshore wind project, targeting capacity of up to 700 MW.
German manufacturer Nordex will supply 13 N163/6.X wind turbines to developer SAB WindTeam for a 91 MW wind farm in Brandenburg, with commissioning scheduled for early 2027 and an extended 20-year service agreement.
EDF is delaying the start-up of the Calvados offshore wind farm by more than two years, citing extended adjustments to a drilling tool vital for installing the sixty-four monopile foundations off Courseulles-sur-Mer.
German company NeXtWind signs historic €1.4 billion debt financing to accelerate expansion and modernisation of its onshore wind farms and reach a total capacity of 3 GW by 2028.
Energy company TGS has won a major high-resolution geophysical imaging contract for offshore wind site characterization in Norway, strengthening its position in this rapidly growing market.
Iberdrola Australia secures crucial approval from Australian authorities to begin metocean studies for its 3GW Aurora Green offshore project off the coast of Victoria, marking a decisive stage in its development.
ENGIE begins full operation of the Red Sea Wind Energy wind farm in Egypt, increasing its capacity to 650 MW, four months ahead of schedule, now powering over one million homes in the region.
Tokyo Gas, through TOWII Renewables, a joint venture with EWII, purchases two onshore wind projects developed by Finnish company Puhuri, totalling 74.4 MW, marking its expansion beyond the Danish market.
The European Investment Bank grants EWE AG historic €450mn financing for the installation of 2,600 km of underground power lines and the upgrade of over 1,100 substations in Lower Saxony.