NOVELTY - The converter (5) has a power converter circuit provided with a converter input to receive renewable-source power. The power converter circuit includes a converter output that is coupled to a controller input of a controller circuitry. The controller circuitry setups to operate the power converter circuit at an operating point selected to maximize power converted from the renewable-source power. The controller circuitry setups to supply the converter output at higher priority for renewable-source power than for metered power for a power converter output load (LD) above a user-set threshold.    USE - Two-stage power converter for use in a power converter system (claimed), that is utilized to provide electrical power from renewable energy sources e.g. solar, wind, water, and geothermal, to loads such as worldwide interoperability for microwave access base station, transceivers and antennas, at cellular telephone tower system. Can also be used for motors, lighting, and switching gear installed at a home or commercial facility and loads at smaller-scale systems i.e. intersection traffic signals.    ADVANTAGE - The converter responds to low load conditions by changing load conditions in which operation of the load is controlled, so as to ensure that the low load condition does not result in damage to the converter or to a renewable power source, and to enables safe and reliable operation of the load even when installations do not provide power to an alternative current (AC) grid. The converter exhibits excellent dynamic bandwidth in responding to changes at the load for powering loads when boost and direct current (DC)-DC controllers are in feedback control mode.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for operating a power converter to convert power received from a power source to direct current (DC) power    (2) a power converter system for producing a DC output voltage from power sources.    DESCRIPTION OF DRAWING(S) - The drawing shows a circuit block diagram of a power converter system.    Power converter output load (LD)    Output power bus (Vout)    Solar cell array (4)    Converter (5)    Wind-powered generator (6)