A number of photovoltaic modules connected together to provide a single electrical output.
Angle between the north direction and the projection of the surface normal into the horizontal plane; measured clockwise from north. As applied to the PV array, 180 degree azimuth means the array faces due south.
Represents all components and costs other than the PV modules. It includes design costs, land, site preparation, system installation, support structures, power conditioning, inverters, operation and maintenance costs, batteries, indirect storage, and related costs.
The basic unit of a photovoltaic panel or battery.
The ratio of the electric energy produced by a photovoltaic device (under one-sun conditions) to the energy from sunlight incident upon the cell.
Devices that convert DC electricity into AC electricity (single or multiphase).
One thousand watts acting over a period of 1 hour. The kWh is a unit of energy (1 kWh=3600 kJ).
A number of PV cells connected together, sealed with an encapsulant, and having a standard size and output power; the smallest building block of the power generating part of a PV array. Also called panel.
Pertaining to the direct conversion of light into electricity.
PV array that follows the path of the sun to maximize the solar radiation incident on the PV surface. The two most common orientations are (1) one axis where the array tracks the sun east to west and (2) two-axis tracking where the array points directly at the sun at all times. Tracking arrays use both the direct and diffuse sunlight. Two-axis tracking arrays capture the maximum possible daily energy. Typically, a single axis tracker will give you 15% to 25% more power per day, and dual axis tracking will add about 5% to that. The gain depends on latitude and season.
The unit of electric power, or amount of work (J), done in a unit of time. One ampere of current flowing at a potential of one volt produces one watt of power.
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