SolarEdge Energy Bank Installation Manual page 16

NOTE
When using a serial input optimizer for up to two modules connected in
series, and PV modules installed in landscape orientation, it is
recommended to use PV modules with long output cables to avoid the use
of an extension (jumper cable) between two modules.
"Modules with long output cables" refers to modules with longer cables
intended for landscape installation. The output cables length is usually
specified in the Mechanical Characteristics section of the PV Module
Datasheet.
For planning considerations when connecting multiple PV modules to an
Power Optimizer, refer to:
https://www.solaredge.com/sites/default/files/application-note-
connecting-solaredge-power-optimizers-to-multiple-pv-modules.pdf
Between two Power Optimisers or between a Power Optimiser and the inverter:
Extension cables can be installed between Power Optimisers only from row to
row, around obstacles or pathways within a row and from the end of the PV
string to the inverter. The total length of the extension cables may not exceed
the following values:
Single Phase Inverters
All - 300 m
*The same rules apply for Synergy units of equivalent power ratings, that are
part of the modular Synergy technology inverter.
For connecting homerun DC cables from Power Optimisers to the inverter, use
cables with the following cross-sections:
For MC4 connectors: 2.5-10 mm²
SolarEdge Home Hub Inverter Single Phase MAN-01-00812-1.5
Chapter 2: Installing the Power
Three Phase Inverters
SExxK-RWB - 200 m / 650 ft
SE17K and below - 300 m / 1000 ft
SE9KUS, SE20KUS - 300 m / 1000 ft
SE17.5K and above - 700 m / 2300 ft
Optimisers 15