Step 4: Verifying Proper Power Optimizer Connection - SolarEdge SE K Series Installation Manual

Step 4: Verifying Proper Power Optimizer Connection

When a module is connected to a Power Optimizer, the Power Optimizer outputs a safe
voltage of 1V (±0.1V). Therefore, the total PV string voltage should equal 1V times the
number of Power Optimizers connected in series in the PV string. For example, if 10
Power Optimizers are connected in a PV string, then 10V should be produced.
Make sure the PV modules are exposed to sunlight during this process. The Power
Optimizer will only turn ON if the PV module provides at least 2W.
In SolarEdge systems, due to the introduction of Power Optimizers between the PV
modules and the inverter, the short circuit current I
hold different meanings from those in traditional systems.
For more information about the SolarEdge system's PV string Voltage and
current, refer to the V
available on the SolarEdge website at:
https://www.solaredge.com/sites/default/files/isc_and_voc_in_solaredge_
sytems_technical_note.pdf
To verify proper Power Optimizer connection:
Measure the voltage of each PV string individually before connecting it to the other
PV strings or to the inverter. Verify correct polarity by measuring the PV string
polarity with a voltmeter. Use a voltmeter with at least 0.1V measurement accuracy.
NOTE
Since the inverter is not yet operating, you may measure the PV string
Voltage and verify correct polarity on the DC wires.
For troubleshooting Power Optimizer operation problems, refer to Power Optimizer
Troubleshooting on page 86.
Proper Power Optimizer connection can also be verified in the Designer application.
For more information, refer to
https://www.solaredge.com/products/installer-tools/designer#/.
Three Phase Inverters with Synergy Technology PN: SExxK-xxxxIxxxx
and I in SolarEdge Systems Technical Note ,
OC SC
Chapter 2: Installing the Power
and the open circuit voltage V
SC
Optimizers 33
OC