4 Device description
KACO Gerätetechnik GmbH 5 Installation Instructions Powador 01xi
U
Mpp
(+60°C) > min. input voltage (125VDC)
Even at very high external temperatures (+60°C) the
MPP voltage of the connected string should remain
within the admissible input voltage range. If the
temperature rises from 25°C to 60 °C, the MPP voltage
of 12V modules will decrease by approx. 3.6 V per
module (7.2 V for 24V modules). The MPP voltage of
the entire string should be > 125 V.
Even if the MPP voltage is beyond the admissible input
range, the installation nevertheless will continue to work
properly. However, the delivered power is slightly less
than the maximum yield.
Provided that the input voltage is within the admissible
input voltage range, the inverter will not be damaged
if
a connected PV generator should supply current above
the max. usable input current.
If the PV generator should supply more than the max.
PV generator power of the inverter for a short time,
particularly due to clouds and relatively low module
temperatures, it is possible that the inverter switches off
for safety reasons and automatically switches on again
after approx. 10 seconds. The overload status is shown
on the display in plain text. Under normal
circumstances, however, the dynamic control of the
inverter ensures that this condition is recognized and
the inverter operation is continued without any
interruption.
The solar generator still represents the most substantial
cost factor of a solar installation. Therefore, it is very
important to obtain maximum energy yields. To achieve
this goal, solar generators located in Central Europe
should be orientated towards the South at an angle of
inclination of 30°, and shading of whatever kind should
be prevented under all circumstances.
In many cases, the recommended angle of inclination
cannot be implemented for technical reasons. To
achieve the high energy yield of a solar generator with
optimal orientation (South, inclination angle of 30°), the
efficiency of the solar generator can be increased.
For roofs that are orientated towards the East/West we
recommend two-string PV installations. To ensure
optimum yield of the installation, the first string should
be installed on the East side of the roof, whereas the
second string should be installed on the West side of
the roof.
In exposed mountain areas or in Southern regions it is
recommended to reduce the efficiency ranges. Please
consult your specialist dealer or notify us if you should
require any further assistance.
4.2 Protective concepts
The following monitoring and protective functions are
integrated in Powador inverters:
- BISI grid monitoring to protect against personal
injuries and avoid islanding effects according to
VDE0126.
- Overvoltage varistors to protect the power
semiconductors against high-energy transients on the
grid side.
- Temperature monitoring of the heat sink
- EMC filters to protect the inverter against high-
frequency grid interference
- Grid-side varistors to earth/ground, to protect the
inverter against burst and surge pulses.
4.3 Mechanical dimensions
Figure 4.1: Dimensions of Powador
Type Height Width Depth
1501xi 450mm 340mm 200mm
3501xi 500mm 340mm 200mm
4501xi 650mm 340mm 220mm
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