Step 3: Connecting Power Optimisers In Strings - SolarEdge SE12.5K Installation Manual

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Step 3: Connecting Power Optimisers in Strings

For each of the power optimizers:
Connect the Plus (+) output connector of the module to the Plus (+) input
connector of the power optimizer.
Connect the Minus (-) output connector of the module to the Minus (-) input
connector of the power optimizer.
Step 3: Connecting Power Optimisers in Strings
You can construct parallel strings of unequal length, that is, the number of power
optimizers in each string does not have to be the same. The minimum and maximum
string lengths are specified in the power datasheets. Refer to the SolarEdge Site
Designer for string length verification.
NOTE
Use at least 11 AWG/ 4 mm² DC cables.
The total conductor length of the string (excluding power optimizers'
conductors; including home runs and necessary extensions between
optimizers) should not exceed:
2300 ft./ 700 m from DC+ to DC- of the inverter
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 string's first power optimizer to the
Plus (+) output connector of the string's second power optimizer.
2. Connect the rest of the power optimizers in the string in the same manner.
-Three Phase Inverter with Synergy Technology Installation MAN-01-00402-1.2
Figure 4: Power optimizer connectors