Abstract: Disclosed is an adaptable DC-AC inverter system and its operation. The system includes multiple DC input sources as input to provide a stable operation under various conditions. DC input sources may be added to the system or removed from the system without impacting the functionality of the system. The disclosed system is suited for solar energy harvesting in grid-connected or off-grid modes of operation.

Abstract: Disclosed is a drive system and its operation for multiple DC-AC inverters working in parallel, for applications such as off-grid solar energy harvesting, which enables a stable operation under various load conditions. The disclosed drive system offers voltage and frequency synchronized sine wave output from each of the inverters, enabling stable operation of the entire system under differing load conditions.

Abstract: A system and process of its operation for monitoring and managing load circuits connected to a renewable energy generation system are disclosed. A programmable load manger circuit continuously monitors the available energy from the generation system and manages the load circuits connected to the system in a manner such that the energy demand from the active load circuits is below the level of available energy. The load circuits can be prioritized and programmed such that the lower priority loads are deactivated prior to the higher priority loads when the available energy from the generation system is not sufficient to satisfy demand from all the active load circuits. When the renewable energy generation system incorporates more than one generator, a load balancing control algorithm, continuously monitoring the load connected to the system and allocates the load in a balanced manner to each of the generators in the system.

Abstract: A dual mode direct current-to-alternating current (DC-AC) inverter is capable of operating either with or without connection to an active external AC power source. The dual mode DC-AC inverter may operate in “current control mode” when connection to the active AC power source is present and may operate in “power control mode” when connection to the active external AC source is absent. Processes for operating an array of these DC-AC inverters are disclosed. The dual mode operation capability enables the DC-AC inverters to function both in the grid connected mode (i.e., current control mode) as well as off-grid mode (i.e., power control mode). The system is configured to sense the presence or absence of grid power and automatically select the appropriate mode of operation. For the power control mode of operation, a process may include designating a master from the array of DC-AC inverters in order to establish the voltage and frequency reference.

Abstract: A dual mode direct current-to-alternating current (DC-AC) micro-inverter is capable of operating either with or without connection to an active external AC power source. The dual mode DC-AC micro-inverter may operate in “current control mode” when connection to the active AC power source is present and may operate in “voltage control mode” when connection to the active external AC source is absent. Processes for operating an array of these micro-inverters are disclosed. The dual mode operation capability enables the micro-inverter(s) to function both in the grid connected mode (i.e., current control mode) as well as off-grid mode (i.e., voltage control mode). The system is configured to sense the presence or absence of grid power and automatically select the appropriate mode of operation. For the voltage control mode of operation, a process may include designating a master from the array of micro-inverters in order to establish the voltage and frequency references.

Abstract: A dual mode direct current-to-alternating current (DC-AC) micro-inverter is capable of operating either with or without connection to an active external AC power source. The dual mode DC-AC micro-inverter may operate in “current control mode” when connection to the active AC power source is present and may operate in “voltage control mode” when connection to the active external AC source is absent. Processes for operating an array of these micro-inverters are disclosed. The dual mode operation capability enables the micro-inverter(s) to function both in the grid connected mode (i.e., current control mode) as well as off-grid mode (i.e., voltage control mode). The system is configured to sense the presence or absence of grid power and automatically select the appropriate mode of operation. For the voltage control mode of operation, a process may include designating a master from the array of micro-inverters in order to establish the voltage and frequency references.