DMEGC AC Module Installation Manual
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Three Phase
Cable model
Connector
spacing*
PV module orientation
Connectors per box
Q-25-10-3P-200
1.3m
Portrait (all)
200
Q-25-17-3P-160
2.0m
Landscape (60and 96-cell)
160
Q-25-20-3P-160
2.3m
Landscape (72-cell)
160
D ) Check that you have these other items:
•
Racking, AC junction box, homerun
•
Tools: screwdrivers, wire cutter, voltmeter, torque wrench, sockets, and wrenches for mounting hardware
E ) Protect your system with lightning and/or surge suppression devices. It is also important to have insurance that
protects against lightning and electrical surges.
F ) Plan your AC branch circuits to meet the following limits for maximum number of microinverters per branch
when protected with a 20-amp over-current protection device (OCPD).
Maximum* number
of DMEGC ACMs per AC
branch circuit
IQ 7 Modules (single-phase)
IQ 7+ Modules (single-phase)
16
13
IQ 7 Modules (single-phase)
IQ 7+ Modules (three-phase)
48
39
* Limits may vary. Refer to local requirements to define the number of modules per branch in your area.
G ) Size the AC wire gauge to account for voltage rise. Select the correct wire size based on the distance from the
beginning of the Enphase Q Cable to the breaker in the load center. Design for a voltage rise total of less than 2% for
these sections. Refer to the Voltage Rise Technical Brief at
for more information.
Best practice:
Center-feed the branch circuit to minimize voltage rise in a fully populated branch.
4.Enphase Microinverter Installation
Installing the ACM involves several key steps. Each step listed here is detailed in the following pages.
Step 1:
Operating Conditions
Step 2:
Unpacking and Handling
Step 3:
Prepare the Microinverter
Step 4:
Position the Enphase Cable
Step 5:
Connect the Microinverter
Step 6:
Create an Installation Map
Step 7:
Module Installation
Step 8:
Manage the Cabling
Step 9:
Terminate the Unused End of the Cable
Step 10:
Install an AC junction box
