US 12,294,237 B2
Photovoltaic disconnect device for storage integration
Sandeep Narla, Newark, CA (US); Brian Kuhn, Austin, TX (US); Kevin C. Fischer, Orinda, CA (US); and Udo Uebel, San Francisco, CA (US)
Assigned to Unirac, Inc., Albuquerque, NM (US)
Filed by Unirac, Inc., Albuquerque, NM (US)
Filed on Feb. 28, 2023, as Appl. No. 18/176,137.
Application 18/176,137 is a continuation of application No. 17/324,715, filed on May 19, 2021, granted, now 11,695,297.
Claims priority of provisional application 63/144,204, filed on Feb. 1, 2021.
Claims priority of provisional application 63/027,563, filed on May 20, 2020.
Prior Publication US 2023/0208187 A1, Jun. 29, 2023
Int. Cl. H02J 13/00 (2006.01); H02J 9/06 (2006.01); H02S 10/10 (2014.01); H02S 40/34 (2014.01); H02S 40/38 (2014.01)
CPC H02J 9/068 (2020.01) [H02J 13/00002 (2020.01); H02J 13/00036 (2020.01); H02S 10/10 (2014.12); H02S 40/34 (2014.12); H02S 40/38 (2014.12); H02J 2300/24 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A photovoltaic (PV) disconnect device, comprising:
a relay component electrically coupled to a feed circuit of a backup PV power generation system;
a sensor circuit configured to measure a first phase line-to-neutral voltage and a second phase line-to-neutral voltage of the feed circuit of the backup PV power generation system;
a connector port electrically coupled to a backup power bus of an energy control system; and
a controller operatively coupled to the relay component, the sensor circuit, and the connector port, wherein the controller is configured to receive and process the first phase line-to-neutral voltage and the second phase line-to-neutral voltage measurements from the sensor circuit, and wherein the processing the voltage measurements comprises comparing the first phase line-to-neutral voltage and the second phase line-to-neutral voltage measurements to a voltage rating of the backup power bus of the energy control system, and
wherein the controller is configured to selectively actuate the relay component to electrically disconnect the feed circuit of the backup PV power generation system from the backup power bus of the energy control system when the processed first phase line-to-neutral voltage measurement or the second phase line-to-neutral voltage measurement exceeds a threshold voltage, and the threshold voltage is based on the voltage rating of the backup power bus of the energy control system.