Installation Guidelines
For the minimum and maximum number of power optimizers in a string (string
length), see the power optimizer datasheets. Refer to the Designer for string length
verification. The Designer is available on the SolarEdge website at:
https://www.solaredge.com/products/installer-tools/designer#/.
Do not
use extension cables between a module and a power optimizer, between two
modules connected to the same power optimizer, or between two power optimizers
other than in the following cases:
Between a power optimizer and a module:
Power optimizers with the 4-type suffix in their part number (Pxxx-4xxxxxx) -
extension cables of up to 16 m can be installed per power optimizer (8 m for DC+
and 8 m for DC-).
Power optimizers manufactured starting from working week 42, 2019, as
indicated in the serial number (Example:S/N SJ5019A-xxxxxxxx - working week
50, 2019) - extension cables of up to 16 m can be installed per power optimizer (8
m for DC+ and 8 m for DC-).
Between two power optimizers or between a power optimizer and the inverter:
Extension cables can be installed between power optimizers only from row to
row, around obstacles or pathways within a row and from the end of the string
to the inverter. The total length of the extension cables must not exceed the
following values:
Single Phase Inverters Three Phase Inverters
All - 300 m / 1000 ft
SE17K and below - 300 m /1000 ft
SE20K and above - 700 m / 2300 ft
For connecting homerun DCcables from power optimizers to the inverter, use
cables with the following cross-sections:
For MC4 connectors - 8-14 AWG / 2.5-10 mm²
For DCterminal blocks inside the inverter or Connection Unit - 6-14 AWG / 2.5-
16 mm²
Chapter 2: Installing the Power Optimizers 14
Three Phase Inverter with SetApp Configuration PN: SEXXK-XXXXIXXXX
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