Description of the equipment
This equipment is an inverter that converts direct electric current from a
photovoltaic generator into alternating electric current and feeds it into
the national grid.
Photovoltaic panels transform energy from the sun into direct current
(DC) electrical energy (through a photovoltaic eld, also called photovol-
taic (PV) generator; in order to use it it is necessary to transform the type
of alternating current into “AC”. This conversion, known as DC to AC in-
version, is made efciently without using rotating parts and only through
static electronic devices.
In order to allow inverter operation in safe thermal and electrical condi-
tions, in the event of adverse environmental conditions or unsuitable in-
put voltage values, the unit automatically reduces the value of the power
fed into the grid.
This way the solar energy system compensates for the energy drawn
from the utilities connected to the grid to which it is linked.
The solar energy system therefore powers all connected electrical de-
vices, from lighting to household appliances, etc.
When the photovoltaic system is not supplying sufcient power, the pow-
er needed to ensure normal operation of the connected electrical devices
is drawn from the national grid. If, on the other hand, excess power is
produced, this is fed directly into the grid, so becoming available to other
consumers.
In accordance with local and national regulations, the power produced
can be sold to the grid or credited towards future consumption, so bring-
ing about a saving of money.
Operating diagram
Inverter
AC discon-
nect switch
DC disconect
switch
PV
Panels
Distributor Grid
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