A photovoltaic module mounting assembly, comprising: a photovoltaic module frame ; a photovoltaic module coupling , comprising: a body plate having an upper surface along a first plane between a first end and a second end ; a retainer extending downward from the second end , wherein the retainer includes a retention surface along a second plane orthogonal to the first plane; and a toe extending orthogonal to the second plane from the retainer to a terminal edge ; and a photovoltaic module mounting chassis , comprising: a bridging member having an elongated body between a first end and a second end ; and a grounding plate coupled to the elongated body at the first end , the grounding plate including a toe receiving portion including (a) an upper receiving surface and (b) an upper toe slot through the upper receiving surface , and a contact portion including a contact surface vertically higher than the upper receiving surface , and wherein the contact surface is electrically connected to the second end through the bridging member , wherein the photovoltaic module coupling is configured to attach the photovoltaic module frame to the photovoltaic module mounting chassis by inserting the toe of the photovoltaic module coupling into said upper toe slot . a photovoltaic module frame ; a photovoltaic module coupling , comprising: a body plate having an upper surface along a first plane between a first end and a second end ; a retainer extending downward from the second end , wherein the retainer includes a retention surface along a second plane orthogonal to the first plane; and a toe extending orthogonal to the second plane from the retainer to a terminal edge ; and a body plate having an upper surface along a first plane between a first end and a second end ; a retainer extending downward from the second end , wherein the retainer includes a retention surface along a second plane orthogonal to the first plane; and a toe extending orthogonal to the second plane from the retainer to a terminal edge ; and a photovoltaic module mounting chassis , comprising: a bridging member having an elongated body between a first end and a second end ; and a grounding plate coupled to the elongated body at the first end , the grounding plate including a toe receiving portion including (a) an upper receiving surface and (b) an upper toe slot through the upper receiving surface , and a contact portion including a contact surface vertically higher than the upper receiving surface , and wherein the contact surface is electrically connected to the second end through the bridging member , a bridging member having an elongated body between a first end and a second end ; and a grounding plate coupled to the elongated body at the first end , the grounding plate including a toe receiving portion including (a) an upper receiving surface and (b) an upper toe slot through the upper receiving surface , and a contact portion including a contact surface vertically higher than the upper receiving surface , and wherein the contact surface is electrically connected to the second end through the bridging member , a toe receiving portion including (a) an upper receiving surface and (b) an upper toe slot through the upper receiving surface , and a contact portion including a contact surface vertically higher than the upper receiving surface , and wherein the contact surface is electrically connected to the second end through the bridging member , wherein the photovoltaic module coupling is configured to attach the photovoltaic module frame to the photovoltaic module mounting chassis by inserting the toe of the photovoltaic module coupling into said upper toe slot . <EOS>