diffuse insolation
Diffuse insolation is sunlight received indirectly as a result of scattering due to clouds, fog, haze, dust, or other obstructions in the atmosphere. Opposite of direct insolation. Diffuse sunlight (B), reflected from clouds, the ground, and nearby objects, and direct sunlight (A) falling onto flat-plate solar panels. Credit: US Dept. of Energy
design month
The month having the combination of insolation and load that requires the maximum energy from the array.
depth of discharge (DOD)
Depth of Discharge (DOD) is an alternate method to indicate a battery‘s state of charge (SOC). The DOD is the complement of SOC: as the one increases, the other decreases. While the SOC units are percent points (0% = empty; 100% = full), DOD can use Ah units (e.g.: 0 = full, 50 Ah = […]
deep cycle battery
From Wikipedia, the free encyclopedia A deep cycle battery is a lead-acid battery designed to be regularly deeply discharged using most of its capacity. In contrast, starter batteries (e.g. most automotive batteries) are designed to deliver short, high-current bursts for cranking the engine, thus frequently discharging only a small part of their capacity. While a […]
DC to DC converter
From Wikipedia, the free encyclopedia A DC to DC converter is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. It is a type of electric power converter. Power levels range from very low (small batteries) to very high (high-voltage power transmission). History[edit] See also: […]
days of autonomy
The number of consecutive days a stand-alone system battery bank will meet a defined load without solar energy input.
Czochralski process
The Czochralski process is a method of crystal growth used to obtain single crystals of semiconductors (e.g. silicon, germanium and gallium arsenide), metals (e.g. palladium, platinum, silver, gold), salts and synthetic gemstones. The process is named after Polish scientist Jan Czochralski,[1] who invented the method in 1916 while investigating the crystallization rates of metals.[2] He […]
cycle life
The cycle life is the number of discharge-charge cycles that a battery can tolerate under specified conditions before it fails to meet specified criteria as to performance (e.g., capacity decreases to 80-percent of the nominal capacity). A charge cycle life is the process of charging a rechargeable battery and discharging it as required into a load. […]
current at maximum power (Imp)
The current at which maximum power is available from a module. [UL 1703]