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Temperature compensation

Adjustment via the use of electronic circuitry to change the charge controller activation points depending on battery temperature. This is desirable if the battery temperature is expected to vary by more than 5 degrees C from the ambient temperature. The temperature coefficient for lead acid batteries is typically -3 to -5 millivolts/degrees C per cell.
Temperature factors Used to decrease battery capacity at cold temperatures, to decrease PV module voltage at high temperatures and to increase the resistance of wire at high temperatures.
TF Thin Film.
TF (PV) Thin-film (photovoltaics).
Thermal electric Electric energy derived from heat energy, usually by heating a working fluid, which drives a turbogenerator.
Thermophotovoltaic (TPV) device A device in which solar energy is concentrated onto a radiator which reaches a high temperature and emits the energy in a different part of the spectrum, better matched to the bandgap of the matched solar cell. This approach should enable high cell efficiencies to be obtained.
Thin film A layer of semiconductor material, a few microns or less in thickness, used to make photovoltaic cells. Examples are copper indium diselenide, cadmium telluride, gallium arsenide, and amorphous silicon.
Thin film PV module A solar PV module constructed with sequential layers of thin film semiconductor materials usually only micrometers thick.
Tilt angle The angle of inclination of a solar collector or solar module measured from the horizontal.
Total AC load demand The sum of the AC loads; its value is used to select the correct inverter.
Total internal reflection The trapping of light within the PV cell by internal reflection of incident light at angles greater than the critical angles for the interfaces, so that the light cannot escape the cell and is therefore eventually absorbed by the semiconductor.
Tracker Any device used to direct a PV array towards the sun.
Tracking array A PV array that is moved to follow the path of the sun in order to maintain the maximum incident solar radiation on its surface. The two most common methods are single-axis tracking in which the array tracks the sun from east to west, and two-axis tracking in which the array points directly at the sun all the time. Two-axis tracking arrays capture the maximum possible daily energy. Typically, a single axis tracker will give 15% to 25% more power per day, and dual axis tracking will add a further 5%.
Transformer A device that changes voltage from one level to another. Used to transform voltage levels to facilitate the transfer of power from the generating plant to the customer.
Transistor A semi-conductor device used to switch or otherwise control the flow of electricity.
Trickle charge A small charging current designed to keep a battery fully charged.
Two-axis tracking A system capable of rotating independently about two axes (e.g., vertical and horizontal) and following the sun for maximum efficiency of the solar array.
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