Buyout firm Actis appointed Citigroup to help with the sale of its BTE Renewables business in South Africa and is seeking a value close to $1-billion, according to people familiar with the matter. The parties are close to putting together a shortlist of potential buyers, said the people, who asked not to be identified as the plans are still private. While the deal is attracting some interest there’s no guarantee a transaction will go ahead, they said.