A power management device comprising: a line power input; a line power output; an inverter configured to be coupled with one or more DC power sources, the inverter adapted and configured to receive DC power from a DC power source and output line power; a DC transformer coupled with the line power input, the DC transformer adapted and configured to change line power to DC power; a first relay; a second relay; and a third relay; wherein: if line power is provided via the line power input: the first relay is adapted and configured to electrically couple the line power input to the line power output; the second relay is adapted to deactivate the inverter; and the third relay is adapted to electrically couple the DC transformer to the one or more DC power sources; and if line power is not provided via the line power input: the first relay is adapted and configured to electrically couple the inverter to the line power output; the second relay is adapted to activate the inverter; and the third relay is adapted to disconnect the DC transformer from the one or more DC power sources, characterized in that the device further comprises a sump pump; a float switch; a first timer programmed to periodically interrupt a flow of electricity from the line power input; a second timer programmed to periodically complete a circuit and bypass the float switch and to periodically cause the sump pump to run regardless of whether the float switch is triggered; and a sensor programmed to detect whether vibrations indicative of operation of the sump pump occur. a line power input; a line power output; an inverter configured to be coupled with one or more DC power sources, the inverter adapted and configured to receive DC power from a DC power source and output line power; a DC transformer coupled with the line power input, the DC transformer adapted and configured to change line power to DC power; a first relay; a second relay; and a third relay; wherein: if line power is provided via the line power input: the first relay is adapted and configured to electrically couple the line power input to the line power output; the second relay is adapted to deactivate the inverter; and the third relay is adapted to electrically couple the DC transformer to the one or more DC power sources; and if line power is not provided via the line power input: the first relay is adapted and configured to electrically couple the inverter to the line power output; the second relay is adapted to activate the inverter; and the third relay is adapted to disconnect the DC transformer from the one or more DC power sources, characterized in that the device further comprises a sump pump; a float switch; a first timer programmed to periodically interrupt a flow of electricity from the line power input; a second timer programmed to periodically complete a circuit and bypass the float switch and to periodically cause the sump pump to run regardless of whether the float switch is triggered; and a sensor programmed to detect whether vibrations indicative of operation of the sump pump occur. the first relay is adapted and configured to electrically couple the line power input to the line power output; the second relay is adapted to deactivate the inverter; and the third relay is adapted to electrically couple the DC transformer to the one or more DC power sources; and if line power is not provided via the line power input: the first relay is adapted and configured to electrically couple the inverter to the line power output; the second relay is adapted to activate the inverter; and the third relay is adapted to disconnect the DC transformer from the one or more DC power sources, characterized in that the device further comprises a sump pump; a float switch; a first timer programmed to periodically interrupt a flow of electricity from the line power input; a second timer programmed to periodically complete a circuit and bypass the float switch and to periodically cause the sump pump to run regardless of whether the float switch is triggered; and a sensor programmed to detect whether vibrations indicative of operation of the sump pump occur. the first relay is adapted and configured to electrically couple the inverter to the line power output; the second relay is adapted to activate the inverter; and the third relay is adapted to disconnect the DC transformer from the one or more DC power sources, characterized in that the device further comprises a sump pump; a float switch; a first timer programmed to periodically interrupt a flow of electricity from the line power input; a second timer programmed to periodically complete a circuit and bypass the float switch and to periodically cause the sump pump to run regardless of whether the float switch is triggered; and a sensor programmed to detect whether vibrations indicative of operation of the sump pump occur.