240-MC4 - User Manual

Installation and Operation Manual

Chilicon Power | Aug 2016

THREE PHASE 208 VOLT WIRING

The maximum number of inverters per 208-V split-phase string is 13. There are three power

conductors in a split phase installation. Strings should be staggered across these 3 conductors,

with a third conductor (neutral) to reference the mid-voltage of any 2 of the 3 power

conductors. Chilicon Power trunk cables have 3 color coded conductors, these are: RED, BLACK,

. The CP-250 microinverter system uses the BLACK and conductors for

communication. The inverters automatically detect when they are connected to a 3-phase grid

and the user does not need to provide any additional configuration control.

The Chilicon Power 3-phase gateway option accepts three lines, neutral, and ground. In a 3

phase installation, strings should be configured to connect {L1,L2,N} to {Black,Red, };

{L3,L1,N} to {Black,Red, }; and {L2,L3,N} to {Black,Red, } as shown in the figure

below.

NOTE: Miss-wiring AC grid lines to the inverter trunk (for instance swapping a GRID L1 for GRID

NEUTRAL) will not damage the inverters. However, they cannot export power in this

configuration. If inverters are miss-wired, single blink export confirmation from the LED will not

be established.

WARNING: NEVER CONNECT GREEN to a Live Wire

L3 Bus

N Bus

L2 Bus

L1 Bus

20A / 208 V

J Box

Solar AC Subpanel

12 AWG

20A / 208 V

12 AWG

20A / 208V

12 AWG

Max 13 / String

GRID NEUTRAL  WHITE

GRID L1  BLACK Conductor (PLC Phase)

GRID L2  RED Conductor

GROUND  GREEN Conductor

GRID NEUTRAL  WHITE

GRID L1  BLACK Conductor (PLC Phase)

GRID L3  RED Conductor

GROUND  GREEN Conductor

GRID NEUTRAL  WHITE

GRID L2  BLACK Conductor (PLC Phase)

GRID L3  RED Conductor

GROUND  GREEN Conductor