It said in a statement that the money will allow the company to consolidate its position in its current markets - Spain, Portugal, France and Italy - and "open up new markets, such as the United Kingdom, Germany or Benelux".
Despite Prosolia having only 40 MW of capacity in operation, it has a strong portfolio of 2.85 GW under construction.
"EIG's financial support will help Prosolia Energy’s efforts to meet its 2026 goal of reaching an operating capacity of 2 GW," it said, adding that it also intends to promote new technologies as part of Europe's efforts to transition away from polluting energy sources.
Prosolia Energy focuses on industrial self-consumption projects and on utility-scale generation of renewable energy for sale to the market.
It said EIG - an institutional investor in the global energy and infrastructure sectors - had $23.1 billion under management as of September 2022.