South African energy start-up Sun Exchange raised $1.4-million in a crowd sale of solar cells of a 1.9 MW solar and battery storage facility at Zimbabwe’s Nhimbe Fresh farm, the firm said on Wednesday.

Investors were invited to purchase individual solar cells in the project. In exchange, they will earn a rental income in cryptocurrency from the electricity generated.

Sun Exchange said the crowd sale attracted more than 1 700 individuals buyers.