Abstract: An energy generation system includes an inverter power control system and a plurality of energy storage devices coupled to the inverter power control system. The inverter power control system includes an input configured to receive DC power; a DC/AC inverter stage configured to receive the DC power input; an anti-islanding relay coupled to the output of the DC/AC inverter stage; and a transition relay coupled to the anti-islanding relay, where the transition relay configured to route an output of the inverter power control system between one or more onsite back-up loads and an AC grid. Each energy storage device is configured to communicate with the inverter power control system.

Abstract: A solid state circuit for performing rapid shutdown of a photovoltaic power generation system includes a pair of high voltage power transistors connected between a photovoltaic array and a pair of high voltage lines that function to supply power generated by the photovoltaic array to a DC to AC inverter. The solid state circuit further includes a control circuit configured so that when the photovoltaic power generation system operates under normal conditions, the control circuit maintains the pair of high voltage power transistors in the on state so that power produced by the photovoltaic array can be transmitted to the DC to AC inverter through the pair of high voltage lines. The control circuit is further configured so that upon receiving a rapid shutdown command, the control circuit turns off the pair of high voltage power transistors to thereby electrically disconnect the photovoltaic array from the pair of power lines.

Abstract: A string inverter for use with a photovoltaic array includes at least one string-level DC input channel for receiving DC power from the photovoltaic array, and at least one input-output channel for connecting the string inverter to a battery pack. The string inverter also includes a DC to AC inverter having an AC output, and a switch configured to control a flow of power through the string inverter. When the switch is in a first state, AC power can flow from the string inverter to a load side of a customer utility meter and one or more back-up loads, in a second state, power can flow from the load side of a customer utility meter to the one or more back-up loads bypassing the string inverter, and in a third state, all circuits coupled to the output of the string inverter are electrically disconnected from the string inverter.

Abstract: An indicator device includes a housing configured to be coupled to positive and negative DC wire lines that supply power from an energy generation source to an inverter. The indicator device further includes a current sensor for measuring a current level on the positive and negative DC wire lines, and voltage sensors for measuring a first voltage across the positive and negative DC wire lines, a second voltage across the positive DC wire line and a ground terminal, and a third voltage across the negative DC wireline and the ground terminal. A circuit block compares the measured current level to one or more threshold current levels, and further compares the measured first, second and third voltages to one or more threshold voltage levels, and in response provides an output signal. A visual indicator receives the output signal from the circuit block, and in response provides a visual indication of whether voltage and current levels on the positive and negative DC wire lines are at levels that may harm humans.

Abstract: A string inverter for use with a photovoltaic array includes a string-level DC input channel for receiving DC power from a photovoltaic array. The input channel performs channel-level maximum power point tracking. An input-output channel connects the string inverter to a battery pack. A DC to DC buck-boost circuit between the at least one DC input channel and the at least one input-output channel prevents more than a predetermined amount of DC voltage from reaching the battery pack. A DC to AC inverter circuit having an AC output serving as an output of the string inverter. A revenue grade power meter is configured to measure the AC output of the string inverter.

Abstract: A solid state circuit for performing rapid shutdown of a photovoltaic power generation system includes a pair of high voltage power transistors connected between a photovoltaic array and a pair of high voltage lines that function to supply power generated by the photovoltaic array to a DC to AC inverter. The solid state circuit further includes a control circuit configured so that when the photovoltaic power generation system operates under normal conditions, the control circuit maintains the pair of high voltage power transistors in the on state so that power produced by the photovoltaic array can be transmitted to the DC to AC inverter through the pair of high voltage lines. The control circuit is further configured so that upon receiving a rapid shutdown command, the control circuit turns off the pair of high voltage power transistors to thereby electrically disconnect the photovoltaic array from the pair of power lines.