Step 1 - Install The Ac Branch Circuit Junction Box; Step 2 - Attach The Enphase Micro-Inverters To The Racking; Step 3 - Connecting The Enphase Micro-Inverter Wiring Harnesses - enphase M175-24-240-S Installation And Operation Manual

Step 1 - Install the AC Branch Circuit Junction Box

Mount the Enphase Adaptor Plate at a suitable location on the PV
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racking system (typically at the end of a row of modules).
Install an appropriate junction box with a 15A AC disconnect switch
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(optional as required by local code requirements) to the adaptor plate.
Connect the open wire end of the Enphase AC interconnect cable into
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the junction box using an appropriate gland or strain relief fitting.
Route the continuous Grounding Electrode Conductor (GEC) through
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the AC branch circuit junction box. Check local code requirements for
the gauge of the GEC.
WARNING: Use electrical system components approved for wet
locations only.
NOTE: Please refer to the Enphase website for a list of approved PV
module racking systems.
NOTE: The Enphase M175-24-240-S Micro Inverter is designed to
operate with most 72-cell PV module configurations; sometimes
referred to as "24V modules".

Step 2 - Attach the Enphase Micro-Inverters to the Racking

Mark the approximate centers of each PV module on the racking
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system.
Mount one Micro-Inverter at each of these locations using hardware
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recommended by your PV racking vendor.
WARNING: Allow a minimum of ¾" spacing between the top of the
roof and the bottom of the Micro-Inverter. Enphase also recommends
1" of spacing between the back of the PV module and the top of the
inverter.

Step 3 - Connecting the Enphase Micro-Inverter Wiring Harnesses

Each Micro-Inverter has been provided with two, 36-inch long AC wire
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harnesses with multi-pin connectors (the DC input wires are
approximately 6 inches long and are terminated with single pole MC
connectors). The AC connectors are oppositely sexed, so that multiple
inverters can be connected together to form one continuous AC branch
circuit.
Plug the AC connector of one Micro-Inverter into the connector of the
!
next Micro-Inverter to form a continuous AC branch circuit. Please
Page 7 Copyright Enphase Energy Inc. 2008 Release 1.4