Fimer PVS-175-TL - Characteristics of a Photovoltaic Generator

FIMER_PVS-175-TL A.1 Version_Product manual_EN_RevC-
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Characteristics of a photovoltaic generator
A PV generator consists of an assembly of photovoltaic modules that transform solar radiation into
DC electrical energy and can be made up of:
• Strings: number (X) of PV modules connected in series
• Array: group of X strings connected in parallel.
The string technology was developed to significantly reduce the installation costs of a photovoltaic
system that are mainly associated to wiring on the DC side of the inverter and subsequent distribution
on the AC side.
A photovoltaic panel consists of many photovoltaic cells mounted on the same support.
A string consists of a certain number of panels connected in series;
An array consists of two or more strings connected in parallel.
Large photovoltaic systems can include multiple arrays connected to one or more inverters.
NOTE – D The greater the number of panels in each string, the lower the cost and the less
complex the wiring connections of the system.
Cell Module String Array
The current of each array must fall within the rating value limits of the inverter.
ATTENTION – A The inverters referred to in this document are TRANSFORMERLESS. This
type requires the use of insulated photovoltaic panels (IEC61730 Class A Rating) and the
need to keep the photovoltaic generator floating with respect to ground: no terminal of the
generator must be connected to ground.