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How a photovoltaic system works
General infor-
The energy from worldwide sunlight amounts to a total of about
1,540,000,000,000,000,000 kWh/year (1,540 Peta kWh/year). This is
mation
15,000 times as much as the electricity consumption worldwide. We
congratulate you on your decision to actively use world's biggest
energy resource. The word "photovoltaic" comes from the driving
force behind this technology, which is light. When light strikes photo-
voltaic cells, a voltage and current is created.
Power output and voltage are increased by combining a number of
Your roof is
solar cells. If solar modules are connected in series like on a string,
your power
both the output power as well as the voltage will increase.
generator
In a parallel connection of several such strings the output power and
the output current will increase, while the voltage will remain unchan-
ged (see right picture). The combination of all solar modules con-
nected in series and parallel is called a solar array.
Electricity is
The direct current generated in the solar modules can only be fed
converted
into the grid or used in your home after having been transformed by
under the
an inverter.
roof
This is the basic purpose of your FRONIUS IG unit.
+
mod. 1
mod. 2
mod. n
-
+
-
7
mod. 1
mod. 2
mod. n
total array current =
current string 1 + 2, ... n
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