Open-circuit voltage (Voc)

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The voltage across an unloaded (open) photovoltaic device at a particular temperature and irradiance.

Note: For unregulated systems, the open-circuit voltage may be greatly in excess of the nominal voltage.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM