Operation and installation manual
Page 13 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
According to national and local standards and regulations the produced energy
can be sold to the grid or credited to the user against future consumption, thus
granting a great saving of money.
2.2 Fundamental elements of a photovoltaic field: “Strings” and
“Arrays”
The so-called STRINGS technology has been developed in order to reduce the
installation costs of a photovoltaic system as much as possible. These costs are
mainly related to the wiring operations on inverter DC side and the consequent
distribution on the AC side.
A photovoltaic panel is composed of many photovoltaic cells assembled on the
same mount. A STRING is composed of a certain number of panels electrically
connected in series. An ARRAY is composed by one or more strings connected in
parallel.
Photovoltaic systems of a certain size may be composed of several arrays,
connected to one or more AURORA inverters.
The greater the number of panels in each string, the lower the cost and the less
complex the wiring connections of the system.
PV Panel
PV String
PV Array
PV Cell
+
+
_
_
+
_
Figure 2-1: Array composition
