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Solar Technology related terms beginning with W.
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- Wafer : A thin sheet of semiconductor (photovoltaic material) made by cutting it from a single crystal or ingot.
- Watt : The rate of energy transfer equivalent to one ampere under an electrical pressure of one volt. One watt equals 1/746 horsepower, or one joule per second. It is the product of voltage and current (amperage).
- Waveform : The shape of the phase power at a certain frequency and amplitude.
- Wet Shelf Life : The period of time that a charged battery, when filled with electrolyte, can remain unused before dropping below a specified level of performance.
- Window : A wide band gap material chosen for its transparency to light. Generally used as the top layer of a photovoltaic device, the window allows almost all of the light to reach the semiconductor layers beneath.
- Wire Types : See Article 300 of National Electric Code for more information.
- Work Function : The energy difference between the Fermi level and vacuum zero. The minimum amount of energy it takes to remove an electron from a substance into the vacuum.
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