Connecting Power Optimizers; Step 3, Connecting Power Optimizers In Strings - SolarEdge SE3000 Installation Manual

Connecting Power Optimizers

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To connect these power optimizers to the PV modules:
WARNING!
Verify that you have identified the inputs and outputs correctly. Do not connect PV
modules to power optimizer outputs.
NOTE:
The power optimizer has reverse polarity protection. Even so, you must still verify the
correct polarity by checking the PV module's polarity with a voltmeter. Some module
manufacturers may use connector polarity that is different from that used by
SolarEdge power optimizer inputs.

The input connectors are shown in the figures above. The output connectors
are in the middle of each side.
Step 3, Connecting Power Optimizers
in Strings
Power optimizers must be connected in series in order to construct strings.
IMPORTANT SAFETY FEATURE:
As long as the power optimizers are unconnected to the inverter and the inverter is
OFF, the power optimizers will output a safe 1V voltage during installation.

The full string can either be directly connected to the inverter or connected in
parallel to another strings and then together they are connected to the
inverter.

You can construct and connect in parallel strings of unequal length, meaning
the number of power optimizers in each string does not have to be the same.

The power optimizer output cables are labeled + and –.

Connect the Plus (+) connector of the output wire of the first power optimizer
in the string to the Minus (-) connector of the second power optimizer in the
string. Repeat this step for each power optimizer in the string. This procedure
is similar to the standard procedure for connecting PV modules.
WARNING!
Make sure that the Plus (+) and the Minus (-) connector cables are firmly and totally
inserted.
IMPORTANT NOTE:
Be sure to record power optimizer serial numbers during their installation, as this
information may be required later for troubleshooting.
The SolarEdge Monitoring Portal can be used to access SolarEdge site information, as
described in the Step 4, Reporting and Monitoring Installation Data section on page 38.
SolarEdge Installation Guide – MAN-01-00057-2.0
Installing the Power Optimizers
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