SMA SI 3324 - Manual (Page 72)

Glossary SMA Technologie AG
Page 158 SI3324/4248-14:FE2406 User Manual
Overload capability
The overload capability of an inverter describes the ability of the inverter to supply
short-term (seconds or minutes) excessive loads, that can be significantly higher than
the nominal capacity in battery inverters. The overload capability is important to
allow electrical machines with a nominal power output close to the nominal power
output of the stand-alone grid inverter to be started, since these machines typically
require six times the nominal current when starting.
Parallel connection
Parallel connection of the batteries (all positive poles together and all negative poles
together) increases the capacity of the battery bank while keeping the voltage
constant. Example: Two 24 V/100 Ah batteries connected in parallel still have a
voltage of 24 V, but have a capacity of 100 Ah + 100 Ah = 200 Ah.
Piggy-Back (Board)
A printed circuit board that is plugged into another board to increase performance
or expand capabilities. A piggy-back board can also replace a single chip. In this
case, the chip is removed and the board is plugged into the empty socket.
PLC
Abbreviation for Power Line Communication: Describes the process of data transfer
over the grid supply cables. The PLC power module is used to amplify the signal and
is connected in Multi-String and Sunny Mini Central inverters. Powerline
communication is not suitable for Sunny Island inverters.
PV
Photovoltaics (PV) is the conversion of solar irradiation into electrical energy using
special semiconductors called solar cells.
PV array
See PV generator.
PV generator
Technical device for the conversion of light energy into electrical energy. All the
series and parallel mounted and electrically connected solar modules in a PV system
are known as the PV generator.
PV module
See Solar module.
PV array
See PV generator.