At Castle Energy Solutions, we represent some of the most robust, low maintenance horizontal axis wind turbines (HAWT's) in the world. From small, economical units to large units mounted at 120’, we have a turbine to suit almost every renewable energy need.

Proven Energy’s down wind, hinged blade design enables the unit to continue to produce electricity even in the most severe wind conditions. Unlike many turbines, Proven does not have a “cut-out” speed. With over 2,000 units installed worldwide, and over 80% of the UK market share, Proven has “proven” to be a world leader in horizontal axis wind turbines.