SMA S Technical Description page 176

Glossary SMA Solar Technology AG
Parallel Connection
Parallel connection of 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.
Photovoltaics
See PV.
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 an individual 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.
PV
Photovoltaics (PV) is the conversion of solar irradiation into electrical energy using special
semiconductors, so-called solar cells.
PV Generator
Technical device for the conversion of solar energy into electrical energy. This term encompasses all
the electrically connected (in series and in parallel) solar modules in a PV system.
PV Module
See Solar Module.
PV System
Describes a solar power system for generating electrical power. This includes the complete collection
of components needed for the acquisition and utilization of solar energy. As well as the PV generator,
this also includes the Sunny Boy or Sunny Mini Central inverter, for example, in the case of grid-
connected systems.
Self Discharge
Capacitance loss of a battery cell while it is stored or not used. A higher ambient temperature has a
strong influence on self discharge.
Series Connection
In this case the positive pole of each battery is connected to the negative pole of the next battery.
There is only one circuit where current can flow. Series connection increases the voltage of the entire
battery bank. If two 24 V batteries with a capacity of 100 Ah each are connected in series, the total
voltage is 24 V + 24 V = 48 V, while the total capacity remains at 100 Ah.
176 SBU2200-TEN083320 Technical Description