Judgment of the Court (Tenth Chamber) of 11 July 2019.#Agrenergy Srl and Fusignano Due Srl v Ministero dello Sviluppo Economico.#Requests for a preliminary ruling from the Consiglio di Stato.#Reference for a preliminary ruling — Environment — Directive 2009/28/EC — Article 3(3)(a) — Promotion of the use of energy from renewable sources — Production of electricity by solar photovoltaic plants — Alteration of a support scheme — Principles of legal certainty and the protection of legitimate expectations.#Joined Cases C-180/18, C-286/18 and C-287/18.