Commercial Grade Stirling Engine directly converts the reciprocating motion of the pistons into electrical power by means of a linear alternator inside the engine. The Stirling Engine is hermetically sealed with a single penetration of the pressure vessel and sealed feed through connector allows electrical power to be extracted from the unit without gas leakage. The Stirling Engine is equipped with solar concentrator that facilitates ease of operation. Commercial Grade Stirling Engine offers electrical output in the range of 1KW to 50KW depending on the parabolic dish diameter and its capacity.