An alternator overvoltage protection circuit comprising: a conditioner section, a trigger section, a drive section, and a disable section; said conditioner section is connectable to an alternator rotated by an engine, and said disable section is connectable to a load; said trigger section is located between and electrically connected to said conditioner section and said drive section; said drive section is located between and electrically connected to said trigger section and said disable section; said conditioner section is configured to condition voltage output received from said alternator, and output said conditioned voltage to said trigger section; said trigger section is configured to receive said conditioned voltage from said conditioner section; said trigger section is further configured to output current to said drive section when said alternator output voltage exceeds an alternator overvoltage threshold, wherein said trigger section does not output current to said drive section when said alternator output voltage does not exceed said alternator overvoltage threshold; said drive section is configured to activate said disable section when said drive section receives current from said trigger section, the trigger section being located between and electrically connected to the conditioner section and the drive section; and said disable section is configured to divert at least a portion of current away from said load to a ground of said alternator overvoltage protection circuit through a low impedance path when said disable section is activated, thereby disabling said engine, characterized in that said disable section comprises a disable TRIAC having a main terminal 1 connectable to said load and a main terminal 2 connectable to said ground, wherein said disable TRIAC is configured to conduct when said disable section is activated, thereby creating a first current path in the low impedance path between said load at said MT1 and said ground at said MT2, wherein said disable TRIAC is configured to trigger and conduct in quadrant 3, and wherein said drive section is configured for activating said disable section by creating said low impedance path through said drive section between said load and said ground, said low impedance path between said load and said ground creating a second current path and a third current path; said third current path uses a portion of current flowing through said low impedance path to produce a voltage at a gate of said disable TRIAC, said second current path removes current from said gate of said disable TRIAC, thereby causing disable TRIAC to conduct, wherein said voltage produced at said gate of said disable TRIAC and said current removed from said gate of said disable TRIAC are sufficient for said disable TRIAC to trigger and conduct in quadrant 3, wherein the drive section of the alternator overvoltage protection circuit comprises a drive MOSFET, which is electrically connected to the disable TRIAC and electrically connectable to the alternator, and is configured to conduct when the alternator operates in an overvoltage condition when the output voltage of alternator exceeds the alternator overvoltage threshold. a conditioner section, a trigger section, a drive section, and a disable section; said conditioner section is connectable to an alternator rotated by an engine, and said disable section is connectable to a load; said trigger section is located between and electrically connected to said conditioner section and said drive section; said drive section is located between and electrically connected to said trigger section and said disable section; said conditioner section is configured to condition voltage output received from said alternator, and output said conditioned voltage to said trigger section; said trigger section is configured to receive said conditioned voltage from said conditioner section; said trigger section is further configured to output current to said drive section when said alternator output voltage exceeds an alternator overvoltage threshold, wherein said trigger section does not output current to said drive section when said alternator output voltage does not exceed said alternator overvoltage threshold; said drive section is configured to activate said disable section when said drive section receives current from said trigger section, the trigger section being located between and electrically connected to the conditioner section and the drive section; and said disable section is configured to divert at least a portion of current away from said load to a ground of said alternator overvoltage protection circuit through a low impedance path when said disable section is activated, thereby disabling said engine, characterized in that said disable section comprises a disable TRIAC having a main terminal 1 connectable to said load and a main terminal 2 connectable to said ground, wherein said disable TRIAC is configured to conduct when said disable section is activated, thereby creating a first current path in the low impedance path between said load at said MT1 and said ground at said MT2,