Addendum is part of a cluster of companies specialising in providing solutions of all kinds in the field of renewable energy. The Optima Renovables, SL firm, since its founding, has operated in the wind power, photovoltaic, energy efficiency and biogas industries. Addendum, in its ongoing quest for diversification and growth, has become the group’s company responsible for wind energy, offering repair, maintenance, auditing and new application design services in the wind power sector.