Step 3: Connecting Power Optimisers In Pv Strings - SolarEdge SE K Series Installation Manual

18 Step 3: Connecting Power Optimisers in PV strings
Connect the Plus (+) output connector of the module to the Plus (+) input
connector of the Power Optimiser.
Connect the Minus (-) output connector of the module to the Minus (-) input
connector of the Power Optimiser.
Figure 4: S-Series (left) and P-Series (right) Power Optimiser connectors

Step 3: Connecting Power Optimisers in PV strings

You can construct parallel PV strings of unequal length, that is, the number of Power
Optimisers in each PV string does not have to be the same. The minimum and maximum
PV string lengths are specified in the power datasheets. Refer to the SolarEdge Site
Designer for PV string length verification.
NOTE
The DC bus of each unit is separate and not shared for all units. Therefore, in
addition to following the inverter design rules, each unit should follow the
unit design rules as detailed in the Technical Specifications.
1. Connect the Minus (-) output connector of the PV string's first Power Optimiser to
the Plus (+) output connector of the PV string's second Power Optimiser.
2. To minimize electromagnetic interference (EMI), make sure to minimize the distance
between the positive and negative DC cables.
3. Connect the rest of the Power Optimisers in the PV string in the same manner.
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