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Peak Watt
the unit of power commonly used for a photovoltaic device. On average, a peak watt is the power of a monocrystalline cell measuring 100 mm x 100 mm with a surface area of one dm2. Peak power is the power delivered by the panel at the maximum power point (on the current/voltage curve) under standardized test conditions with solar radiation of 1,000 W/m2 (using a standard spectrum) and a cell at 25 °C.
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photon
elementary particle making up all forms of light.
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power electronics
branch of electrical engineering concerning the control of voltage and current supplied by power generators to AC or DC receptors using special semi-conductor devices (power diodes, transistors, thyristors, etc.).
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power generation plants
including nuclear, fossil-fuel (coal, gas and oil) and hydroelectric plants, plus localized generation equipment (wind turbines, solar panels, small hydroelectric installations).
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primary energy
in generating and consuming energy, it is important to make a distinction between primary energy that includes all forms of use (transport, heating, electricity, etc.) and energy that is only used after conversion to electricity. This is why the share of nuclear (which is only used in electricity generation) is only 6.3% for transport, whereas its share in electricity production is slightly greater than 16%.
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primary energy - final energy
primary energy consists of commodities such as oil and natural gas, which must be converted before they can be used, as opposed to final energy, which is ready to be consumed. Final energy is a little more than one-third of primary energy. The difference comes from output losses in the energy system.
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proven reserves
reserves that are exploitable geologically and technically, and whose financial profitability is 90% under current conditions.
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