23 Glossary
SMA America, LLC
236
SI4548_6048-US-TB_en-13
Technical description
Parallel connection
Parallel connection of the batteries (all positive poles connected and all negative poles connected)
increases the capacity of the battery storage system while keeping the voltage constant.
Example: Two 24 V/100 Ah batteries connected in parallel still have a voltage of 24 V, however, 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 printed circuit board can also replace an individual chip. In this case, the
chip is removed and the board is plugged into the empty base.
PLC
Abbreviation for Power Line Communication: Describes the process of data transmission 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.
Protected loads panel
See Stand-alone grid system.
PV
Photovoltaics (PV) is the conversion of solar irradiation into electrical energy using special
semiconductors called PV cells.
PV array
Technical device for the conversion of solar energy into electrical energy. All electrically connected
(in series and in parallel) PV modules of a PV plant are referred to as the PV array.
PV cell
An electronic component that generates electrical energy when irradiated with sunlight.
Since the electrical voltage of a single PV cell is very low (approx. 0.5 V), multiple PV cells are
combined with PV modules. The most common semiconductor material presently used for PV cells is
silicon which is manufactured in different forms (monocrystalline, polycrystalline, amorphous). In
addition to different mechanical variations, that are usually designed to increase the level of
efficiency, completely new materials are currently being tested (cadmium telluride, cadmium indium
sulphide, titanium dioxide and many others).
PV field
See PV array
Summary of Contents for Sunny Island 4548-US
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