Renewable energy stocks largely ended higher on Friday, September 18, even as the broader Indian market closed mixed, with ACME Solar Holdings and Insolation Energy emerging as the biggest gainers among the green-energy counters tracked. ACME Solar was the top performer, gaining 6.65%, followed by Insolation Energy, which rose 6.23%. A majority of the renewable and clean-energy stocks tracked by Saur Energy also ended the session in positive territory, pointing to continued buying interest in th