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Voltage is an important factor in PV technology. It describes the difference in electrical potential between two points in a circuit. Voltage is measured in volts (V) and is a critical factor in the power of solar cells. The higher the voltage, the more power the solar cells generate. Voltage in a photovoltaic system can be measured using voltmeters to monitor and optimise the efficiency of the system. You can find more information on this important topic in our photovoltaic glossary.