1. The document analyzes and compares the energy efficiency of three variants of an electrohydraulic closed-loop control system for driving electric generators using wave energy. 2. It calculates the hydraulic losses at maximum and minimum flow rates for each variant, finding the highest losses of 5.4 kW for Variant 1 and lowest of 1.6 kW for Variant 2. 3. An analysis of energy efficiency shows Variant 2 is the most efficient at 93.6%, followed closely by Variant 3 at 93.3%, while Variant 1 has the lowest efficiency at 78.4%.