MI 3108 EurotestPV
Solar measurements
– PV systems
77
Ptheo…. .. calculated theoretical output power of the panel at momentary conditions
η2…...... ... calculated efficiency of the panel at momentary conditions (simplified
method, see appendix E)
Notes
:
Before starting the PV measurements settings of PV module type and PV test
parameters should be checked.
For calculation of STC results PV module type, PV test parameters, Uoc, Isc, Irr
and Tcell values must be measured or be entered manually before the test. The
results in ENV. and Uoc/Isc menus are considered. If there are no results in Uo/Isc
menu the instrument will consider results in I-V menu.
The Uoc, Isc, Irr and T measurements should be carried out immediately before
the PANEL test. Environmental conditions must be stable during the tests.
For best results PV remote unit A 1378 should be used.
6.4 Measuring of environmental parameters
Temperature and solar irradiance values must be known for:
Calculation of nominal values at standard test conditions (STC),
Checking that environmental conditions are suitable for carrying out the PV tests.
The parameters can be measured or entered manually. The probes can be connected to
the instrument or to the PV remote unit A 1378.
See chapter 4.2 Function selection for instructions on
key functionality.
Figure 6.17: Environmental
parameters screen
Test parameters for measuring / setting of environmental parameters
INPUT
Input of environmental data [ MEAS, MANUAL]
