NOVELTY - The system (10) has a system control device (24) e.g. smart phone, in communication with an inverter and an automatic transfer switch (18). The control device matching alternating current (AC) power produced by a synchronous AC generator (12) and a renewable power source to power produced by a main AC power source. The control device selectively determines AC power input to an AC load panel (22) and manages the AC power produced by the renewable power source and the AC generator to prevent reverse power flow to the AC generator when available AC power exceeds demand at the load panel.    USE - AC electrical cogeneration system for maximizing efficient electricity distribution from AC power sources e.g. AC solar inverter and synchronous AC generator such as tidal generator and bio-digester, for applications by synchronously AC paralleling the multiple AC power sources. Uses include but are not limited to commercial applications, residential applications, hospital applications and environmental applications.    ADVANTAGE - The system is easy to install and inexpensive to operate, thus reducing an amount of energy needed from a utility company and an amount of fuel required by the synchronous AC generator when solar AC power is generated and consumed by the common AC load or directed back to the AC utility grid. The system is provided with control logic that can safely balance use of solar produced and generator electricity to meet a common load under all power and load scenarios. The system reduces or eliminates DC current in a solar panel so as to reduce or eliminate conversion of AC current from the inverter to the load panel, which terminates the reverse AC power event. The system provides a control system that can monitor and present data regarding the system at a single point or multiple satellite locations in an efficient manner. The system meets all current and anticipated electrical and fire safety codes and regulations in an efficient manner.    DETAILED DESCRIPTION - The inverter is a direct current (DC)/AC inverter (20). The renewable power source comprises a solar panel (14). An INDEPENDENT CLAIM is also included for a method for efficiently distributing power by synchronously AC paralleling multiple power sources.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of an AC power cogeneration and AC coupling system.    AC electrical cogeneration system (10)    Synchronous AC generator (12)    Solar panel (14)    Automatic transfer switch (18)    DC/AC inverter (20)    AC load panel (22)    System control device (24)