South African private equity firm Africa Infrastructure Investment Managers is paying $31 million for a minority stake in off-grid solar firm BBOXX. Africa Infrastructure Investment Managers, or AIIM, manages $2.1 billion in African infrastructure investments as part of South African financial services group Old Mutual. Its investment will support BBOXX’s goal of installing more than two million solar systems in Kenya, Rwanda and the Democratic Republic of Congo (DRC) by 2022… More