US 9,812,869 B2
Rapid shutdown and safety disconnect for hybrid PV systems
Sandeep Narla, San Jose, CA (US)
Assigned to SolarCity Corporation, San Mateo, CA (US)
Filed by SolarCity Corporation, San Mateo, CA (US)
Filed on Jul. 28, 2016, as Appl. No. 15/222,785.
Claims priority of provisional application 62/311,372, filed on Mar. 21, 2016.
Prior Publication US 2017/0271875 A1, Sep. 21, 2017
Int. Cl. H02J 3/38 (2006.01); H02J 3/46 (2006.01); H02S 40/38 (2014.01); H02S 40/32 (2014.01)
CPC H02J 3/383 (2013.01) [H02J 3/46 (2013.01); H02S 40/32 (2014.12); H02S 40/38 (2014.12)] 19 Claims
OG exemplary drawing
 
1. An energy generation system comprising:
a first rapid shutdown mechanism configured to prevent a flow of power from a photovoltaic (PV) array when activated;
a first battery pack comprising one or more power storage devices;
a switch; and
a first inverter coupled to the first rapid shutdown mechanism, the switch, and the first battery pack, the first inverter comprising:
first anti-islanding relays configured to electrically disconnect the first inverter from a utility grid when activated;
first transfer relays configured to electrically disconnect the first inverter from a load when activated; and
a first detection and initiation circuit coupled to the first rapid shutdown mechanism, first battery pack, first anti-islanding relays, and first transfer relays, wherein the first detection and initiation circuit is configured to detect an activation of the switch and to activate the first rapid shutdown mechanism, disable the first battery pack, activate the first anti-islanding relays, and activate the first transfer relays in response to the detection of the activation of the switch, thereby preventing flow of power from the array into an external circuit in response to the detection of the activation of the switch.