TY - SER AU - Gonzalez, I. AU - Calderon, M AU - Calderon, A.J. AU - Gonzalez, J E TI - Estimation OfState-Of-Charge of Gel Lead-Acid Batteries and Application ToControl of a Stand-Alone Wind-Solar Test-Bed with Hydrogen Support KW - State of Charge (Soc) KW - Control Algorithms KW - Hybrid Solar-Wind Hydrogen System ER -