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VAC |
Volts alternating current. |
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Varistor |
A non-ohmic or voltage-dependent variable resistor. Normally used as over-voltage limiters to protect sensitive equipment from power spikes or lightning strikes by shunting the energy to ground. |
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VDC |
Volts direct current. |
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Vented cell |
A battery with a vent to expel gases liberated during charging. |
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Vmp |
The voltage at which a PV device is operating at maximum power. |
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Voc |
Open-circuit voltage Volt (V). The unit of electromotive force that will force a current of one ampere through a resistance of one ohm. Voltage at maximum power. |
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Volt |
The unit of electric potential and potential difference. The amount of work done per unit charge in moving a charge from one place to another. The potential difference across a resistance of 1 Ohm when a current of 1 Amp is flowing. |
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Voltage |
Unit of measurement for the electrical pressure of electricity. Measured in Volts (V). |
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Voltage drop |
The voltage lost along a length of wire or conductor due to the resistance of that conductor. Also applies to resistors. The voltage drop is calculated by using Ohm's Law. |
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Voltage protection |
A sensing circuit on an inverter that will disconnect the unit from the battery if input voltage limits are exceeded. |
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Voltage regulator |
A device that controls the operating voltage of a photovoltaic array. |
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Voltmeter |
An electrical or electronic device used to measure voltage. |
