Technical Specifications; Input Values - Power One AURORA PVI-3.8-I-OUTD Manuel D'utilisation Et D'installation

Installation and operating manual
(PVI-3.8/4.6-I-OUTD Rev.: 1.5)
8

TECHNICAL SPECIFICATIONS

8.1

Input values

WARNING: the photovoltaic field and system wiring must be configured in
such a way that the PV input voltage is less than the maximum upper limit,
independent of the model, number and operating conditions of the chosen
photovoltaic panels.
As the panel voltage also depends on the operating temperature, the choice of
the number of panels per string must take into account the minimum ambient
temperature for that specific area (see table A).
WARNING: the inverter is provided with a linear output derating depending
on the input voltage, from 470 Vdc (100% output power) to 520 Vdc (0%
output power)
WARNING: the open circuit voltage of the photovoltaic panels is affected
by the ambient temperature (the open circuit voltage rises as temperature
drops) and it is necessary to ensure that the minimum expected temperature
for installation does not cause the panels to exceed their maximum upper
voltage limit of 520 Vdc. The table below is an example which indicates the
maximum voltage for each panel for typical panels of 36, 48, 60 and 72 cells,
depending on temperature (assuming a rated open circuit voltage of 0.6 Vdc
for a cell at 25°C and a temperature coefficient of -0.0023 V/°C. The table
thus shows the maximum number of panels that may be connected in series,
depending on the minimum operating temperature. Consult the panel
manufacturer for the correct temperature coefficient of V
the maximum voltage of the photovoltaic array.
Page 88 of 95
before calculating
oc