1. Open circuit voltage (or potential) is voltage which is not connected to any load in a circuit.
2. Open-circuit voltage is the difference of electrical potential between two terminals of a device when disconnected from any circuit.
OCV, Uoc, Voc
Voltage, potential, Short Circuit, Power Supply
http://www.learningaboutelectronics.com/Articles/What-is-open-circuit-voltage.php (1.); https://en.wikipedia.org/wiki/Open-circuit_voltage (2.)
Author: Abdulhamid El-Issa