SMA Solar Technology America LLC 23 Glossary
Operating Manual SI4548-6048-US-BE-en-21 235
DC
Abbreviation for "Direct Current"
Derating
A controlled reduction in performance, usually dependent on component temperatures.
Derating is initiated in order to avoid the shutting down of the complete plant.
DSP
Abbreviation for Digital Signal Processor. A DSP is a microprocessor chip especially developed for
digital signal processing and control.
Electrolyte
A chemical solution that allows the conduction of ions within a battery. In lead-acid batteries, the
electrolyte is diluted sulfuric acid and is also a reactant in the electrochemical reaction. Nickel/
cadmium batteries use an alkaline electrolyte (potassium hydroxide).
EPROM
See Flash EEPROM
Firmware
Firmware is software that is stored in a chip in various electronic devices, such as Sunny Island, hard
disk recorders, DVD burners and players, newer television sets, household appliances and computers
— in contrast to software that is stored on a hard drive, CD-ROM or other media. These days, firmware
is usually stored in Flash memory or an EEPROM chip.
FLA
Flooded lead-acid battery: a lead-acid battery with liquid electrolyte, also often described as a
flooded lead-acid battery.
Flash EEPROM
The abbreviation EEPROM stands for Electrically Erasable Programmable Read-Only Memory. Flash
memory is a digital storage chip, the exact designation is Flash EEPROM. In contrast to "normal"
EEPROM storage, individual bytes (the smallest addressable storage units) cannot be deleted.
EEPROM is a non-volatile, electronic storage component that is used in the Sunny Island, the computer
industry (among others) and usually in Embedded Systems. Flash EEPROMs are used where
information must be permanently stored in the smallest amount of space, e.g. for storing the firmware.
MSD
See Automatic disconnection unit
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