Exus Brasil Investimentos, a unit of Texas-based renewables investment and asset management firm Exus Management Partners, has announced a deal to buy 100% of Brazilian project development company Riacho da Serra Energia for BRL3.5bn ($685m) from Decal Renewables and Upside Value.

Riacho da Serra is developing 1.06GW of solar power capacity spread across 20 projects in the north-eastern state of Piauí, which has one of the highest solar irradiation levels in Brazil.