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M 2 5 0 Q U I C K I N S T A L L G U I D E
Installing the M250 Microinverter (M250-60-2LL)
NOTE: The M250 meets the requirements of NEC 690.35. Because the DC circuit is isolated and insulated from
ground, the M250 does not require that you install a GEC between microinverters. To support this feature, the
PV module must be equipped with DC cables labeled "PV Wire" or "PV Cable."
Read the included safety information and follow all warnings and instructions in the M250 Installation and Operation
Manual at
http://www.enphase.com/support
Connect the Envoy
1
a. Connect the Envoy to power and Internet according to the Envoy Quick
Install Guide.
b. Look for the + Web indication on the LCD screen.
c. Leave the Envoy running while you install the microinverters
so that any required
Envoy software up-
grade completes.
Position the Enphase Engage™ Cable
2
a. Lay out the cabling along the installed racking for the AC branch circuit.
b. Install an appropriately rated, off-the-shelf junction box at a
suitable location on the racking.
See notes in Step Details on back.
AC junction
box
before installing the Enphase M250™ Microinverter.
®
Communications Gateway™
Warning: Do not remove power from
the Envoy if the LCD displays:
"Upgrading. . . Do Not Unplug."
connects to drop
connector
M250
DC connectors
You must use 240 VAC cable for single-phase
Envoy
AC power
cord
Ethernet cable
terminator
drop
connector
cable ties
Check the drop connector labels to
be sure that you have the right cable.
or 208 VAC cable for three-phase.
®
broadband
router
Engage
Cable
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