Renewable energy firm ACME Solar Holdings has filed preliminary papers with SEBI to raise Rs 22 billion through an IPO. Funds raised through the issue will be used to repay debt and to finance the company’s 200 MW solar power project in Rajasthan and for general corporate purposes. Besides, the company is considering a pre-IPO placement of up to 5,222,079 equity shares to certain investors for up to Rs 5 billion.