The deal, valued at €32.2m ($39.1m), is an extension to a preliminary contract agreed between the two firms in March.
SPF Energy, an investment company, has a PV portfolio believed to be one of the biggest in Italy this year, with a value of up to €80m.
Paul Barritt, chief financial officer at Tuscany-based Acta, tells Recharge the future is bright for solar energy in the country.
He