Maimane says private capital funding is the way to go for Eskom and SAA.
They have all been charged with possession of stolen property.
Eskom says it will never compromise SA's power supply by providing electricity to Botswana.
Botswana depends on SA's electricity when it doesn't have the capacity to supply power to its citizens.
The government is said to be keen to sell the stake to raise funds for state power utility Eskom.
The alleged mismanagement of a renewable energy deal is costing the power utility about R35m.