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For intermittent power sources, such as wind and solar, nameplate power is the source's output under ideal conditions, such as maximum usable wind or high sun on a clear summer day. Capacity factor measures the ratio of actual output over an extended period to nameplate capacity.
The highest power thus measured is the 'nominal' power of the module in watts. This nominal power divided by the light power that falls on a given area of a photovoltaic device (area × 1000 W/m 2) defines its efficiency, the ratio of the device's electrical output to the incident energy.
power rating is specified in terms of apparent power (KVA or MVA), since the exact power factor will be determined by the external factors; [5] power factor (PF) is the nominal power factor for other ratings; usually PF = 0.8; [5] insulation class (B, F, H) for the primary coil. Typical value is F, although older generators might use class B; [5]
The net capacity factor is the unitless ratio of actual electrical energy output over a given period of time to the theoretical maximum electrical energy output over that period. [1] The theoretical maximum energy output of a given installation is defined as that due to its continuous operation at full nameplate capacity over
For intermittent power sources, such as wind and solar, nameplate power is the source's output under ideal conditions, such as maximum usable wind or high sun on a clear summer day. Capacity factor , average capacity factor , or load factor is the ratio of actual electrical generation over a given period of time, usually a year, to actual ...
Nominal power is the nameplate capacity of photovoltaic (PV) devices, such as solar cells, panels and systems, and is determined by measuring the electric current and voltage in a circuit, while varying the resistance under precisely defined conditions.
Nameplate capacity denotes the peak power output of power stations in unit watt prefixed as convenient, to e.g. kilowatt (kW), megawatt (MW) and gigawatt (GW). Because power output for renewable sources is variable, a source's average generation is generally significantly lower than the nameplate capacity.
Capacity credit (CC, also capacity value [1] or de-rating factor [2]) is the fraction of the installed capacity of a power plant which can be relied upon at a given time (typically during system stress), [3] frequently expressed as a percentage of the nameplate capacity.