SMA SI 3324 - Manual (Page 70)

Glossary SMA Technologie AG
Page 156 SI3324/4248-14:FE2406 User Manual
FLA
Flooded Lead Acid battery: A lead acid battery with liquid electrolyte, also often
described as a sealed 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.
Float charge
Maintenance charge: Allows the batteries to be slowly charged to a charge level of
100 % without the negative effects of overcharging. Complete charging to 100 %
using float charge takes several days. For this reason, float charging is more
important for grid backup systems and less important for stand-alone grids.
Full charge
Recharging of the batteries to a level of approx. 95 % on a regular basis (at least
once a month). This efficiently avoids premature aging of the batteries caused by
inadequate charging.
Gel battery
A type of battery in which the electrolyte (a mixture of water and sulfuric acid) is
bound into a gel. This is a type of sealed lead acid battery. A gas mixture (hydrogen
and oxygen) is always generated when lead acid batteries are charged, and in
normal operation this internally recombines to form water. This removes the need for
regularly refilling the battery cells with water, which is why these batteries are often
described as "low maintenance" or even "maintenance free" (see also AGM
batteries). Gel batteries are available from many different manufacturers for a wide
range of applications. There are Gel batteries for high-current applications but also
for cycle operation with very high cycle resistance.
Grid-coupled system
PV system that is connected to the power supply grid of an external energy supplier.
Independent disconnection device
The "Independent disconnection device between a grid parallel power generating
system and the public low voltage grid" (DIN VDE 0126-1-1) is an equivalent
replacement for a normal public disconnection device with isolation function that is
accessible to the distribution grid operator at any time. This is a mandatory safety