A method for controlling power produced by a renewable energy source, the method comprising: regulating active power produced by the renewable energy source towards an apparent power setpoint; based on whether a state of a switch corresponds to selection of a power factor foldback or a voltage foldback, selectively regulating voltage based on the power factor foldback or the voltage foldback associated with the renewable energy source; wherein: when power factor foldback is selected, the method comprises regulating the power factor associated with the renewable energy source based at least in part on a power factor angle magnitude setpoint, and reducing the power factor angle magnitude setpoint towards zero when apparent power produced by the renewable energy source approaches or exceeds the apparent power setpoint; when voltage foldback is selected, the method comprises regulating voltage of the renewable energy source based at least in part on measured volt-amps reactive, VARs, and an apparent power ratio, wherein the apparent power ratio is about equal to the apparent power divided by the apparent power setpoint; the reducing of the power factor angle magnitude setpoint towards zero further comprises folding back a power factor setpoint angle utilizing a foldback function based at least in part on measured apparent power, the apparent power setpoint, and a power factor foldback threshold; and the foldback function is based at least in part on a ratio of measured apparent power to the apparent power setpoint, and wherein the foldback function reduces the power factor angle magnitude setpoint when the measured apparent power of the renewable energy source is greater than the apparent power setpoint. regulating active power produced by the renewable energy source towards an apparent power setpoint; based on whether a state of a switch corresponds to selection of a power factor foldback or a voltage foldback, selectively regulating voltage based on the power factor foldback or the voltage foldback associated with the renewable energy source; when power factor foldback is selected, the method comprises regulating the power factor associated with the renewable energy source based at least in part on a power factor angle magnitude setpoint, and reducing the power factor angle magnitude setpoint towards zero when apparent power produced by the renewable energy source approaches or exceeds the apparent power setpoint; when voltage foldback is selected, the method comprises regulating voltage of the renewable energy source based at least in part on measured volt-amps reactive, VARs, and an apparent power ratio, wherein the apparent power ratio is about equal to the apparent power divided by the apparent power setpoint; the reducing of the power factor angle magnitude setpoint towards zero further comprises folding back a power factor setpoint angle utilizing a foldback function based at least in part on measured apparent power, the apparent power setpoint, and a power factor foldback threshold; and the foldback function is based at least in part on a ratio of measured apparent power to the apparent power setpoint, and wherein the foldback function reduces the power factor angle magnitude setpoint when the measured apparent power of the renewable energy source is greater than the apparent power setpoint.