Technical data

Step-by-step procedure for configuration of the photovoltaic generator with Aurora Designer
Step 1 – General Data entry
•Selection of language
•Selection of PV panels brand and model (one model only)
•Selection of inverter models
•Selection of mounting type
•Setting up minimum ambient temperature (also used as minimum cell
temperature to calculate string voltages)
•Setting up maximum ambient temperature (maximum cell temperature at
which the string voltages are assessed; it is assessed taking into consideration
the type of mounting selected)
•Setting up the panel Derating Coefficient: what does the panel Derating
Coefficient take into account?
Maximum cell temperature: related to assembly type -max
ambient temperature
Max cell temperature= max ambient temperature+ ΔT
Solar tracker: ΔT=25°C
Mounted on structure: ΔT=30°C
Roof mounted: ΔT=35°C
Panel derating coefficient(PDC)
Estimate of losses in DC section of system :
•Resistive losses in cables/fuses/disconnectors
•Power losses due to mismatching in the photovoltaic generator
•Losses connected to dirt/dust on the photovoltaic generator
•Decay of the panel performance
•Derating of the power available from the photovoltaic generator due
to non-optimal conditions of installation
nomPpvinvPdcPDC ,/,
Dimensioning systems with Power-One inverters