Verifying Proper Power Optimizer Connection - SolarEdge SE3000US Installation Manual

Verifying Proper Power Optimizer
Connection
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To verify proper power optimizer connection:

Make sure the PV modules are exposed to sunlight during this process.
Otherwise, the power optimizers may not be powered up.

Verify each string individually before connecting it to the other strings or to
the inverter.

Each power optimizer connected to a PV module initially produces a safe
voltage of 1 V. A string with properly connected power optimizers should
produce 1 V per power optimizer in the string. For example, if 10 power
optimizers are connected in a string, then 10 V should be produced. Use a
voltmeter with at least 0.1V measurement accuracy to verify that the total
voltage produced is in accordance with the number of power optimizers in
the string.
•
If 0 V is measured for the string, check for a disconnection of the outputs
of one of the power optimizers.
•
If the voltage is lower than the quantity of power optimizers (for
example, 9 V when 10 power optimizers are connected), verify whether
one or more of the power optimizers are not connected, meaning they
were skipped during the string connection process. If they are all
connected, verify whether one or more of the PV modules is not
connected properly to its power optimizer.
•
If the voltage is too high, then apply the CAUTION below.
SolarEdge Installation Guide – MAN-01-00002-1.6
Installing the Power Optimizers
24