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v

VAC: Volts alternating current.

VDC: Volts direct current.

Vamp: Refers to the maximum powered voltage.

Voc: Refers to voltage with an open circuit.

Volt / V: It is the unit of electromotive force, where one volt generates 1Amp current against resistance of one ohm.

Voltage at maximum power / Vamp: Refers to the voltage when a PV module supplies maximum power (UL1703).