23 Glossary
SMA America, LLC
232
SI4548_6048-US-TB_en-13
Technical description
Battery charge mode
A battery inverter operating mode, in which the inverter takes energy from the AC grid to recharge
the battery in a controlled fashion. In this operating mode, the off-grid inverter is responsible for
correctly charging the batteries and acts like an independent battery charger.
Battery management
The battery management is responsible for optimal battery storage system charging and reliable
protection against deep discharge. This is the only way of ensuring that the battery service life reflects
the manufacturer's specifications.
Battery power converter
A bidirectional converter that can regulate voltage and frequency in a stand-alone grid as well as
correctly charge the batteries.
Battery storage system
The combination of serial and possibly also parallel connection of several identical batteries.
Battery storage systems of 12 V, 24 V, 48 V and 60 V are typical.
Boost charge
Boost charge: serves to charge the battery as quickly and efficiently as possible to a state of charge
of approx. 85% to 90%.
Capacity
Describes the storage capability of a cell or battery, specified in Ah (ampere-hour).
The capacity of a battery is heavily dependent on the charging cycle, the amount of electrical current
strength drawn and the temperature.
CEC
Abbreviation for "California Energy Commission"
Central inverters
An inverter concept, in which all PV modules are connected to each other (in series and/or parallel)
and which uses a single inverter for feeding energy into the utility grid. The low cost of the inverter is
usually offset by the much higher installation efforts required and possible yield losses due to
variations in shading of different PV modules.
Charge mode
See Battery charge mode
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