Alteren

About

Alteren is a private headquartered in Versailles, France with approximately 10-50 employees specializing in Solar.

Alteren is a solar artisan and installer based in Versailles, operating throughout the Yvelines and neighboring departments (Essonne, Eure, Eure-et-Loir, Hauts-de-Seine, Val-d'Oise). Founded by Jean-François, a former corporate executive turned energy entrepreneur, the company specializes in residential photovoltaic installations and self-consumption systems. Alteren handles projects end-to-end, from technical site assessment through grid connection, without using subcontractors. The company emphasizes direct client relationships, quality materials from leading manufacturers, aesthetic integration, and long-term performance monitoring. Installations include a 10-year workmanship guarantee and panel performance warranties up to 40 years.