enphase M215-60-2LL-S22-IG, M250-60-2LL-S22, M250-60-2LL-S25, M250-72-2LL-S22, M250-72-2LL-S25 Quick Install Manual
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QUICK INSTALL GUIDE
Installing Enphase M250 and M215 Microinverters
To install the Enphase M250 and M215 Microinverters™ read and follow all warnings and instructions in this guide and in the Enphase M250 and M215
Microinverter Installation and Operation Manual at: enphase.com/support. Safety warnings are listed on the back of this guide.
Because ground fault protection (GFP) is integrated into the M250 and M215 microinverters, the models listed in this guide do not require a grounding electrode conductor (GEC) between microinverters. To support GFP, use only PV modules equipped with DC cables labeled PV Wire or PV Cable.
PREPARATION
A ) Download the Enphase Installer Toolkit™ mobile app and
open it to log in to your Enlighten account. With this app,
you can scan microinverter serial numbers and connect
to the Envoy-S to track system installation progress. To
download, go to enphase.com/toolkit or scan the QR code at right.
B ) Refer to the following table and check PV module electrical compatibility
at: enphase.com/en-us/support/module-compatibility.
Microinverter model PV module cell count
M215-60-2LL-S22-IG
M250-60-2LL-S22
M250-60-2LL-S25
M250-72-2LL-S22
M250-72-2LL-S25
M250-72-2LL-S22-US
To ensure mechanical compatibility, order the correct connector type
(MC-4 locking or Amphenol H4) for both microinverter and PV module
from your distributor.
C ) In addition to the Enphase Microinverters, PV modules and racking, you
will need these Enphase items:
•
Enphase Envoy or Envoy-S™ communications gateway (required to
monitor solar production)
•
Enphase Engage Cable™, single-phase 240 VAC or three-phase 208
VAC, as needed
•
Tie wraps or cable clips
•
Enphase Sealing Caps (for any unused drops on the Engage Cable)
•
Enphase Terminators (one needed at the end of each AC branch
circuit)
•
Enphase Disconnect Tool (number 2 and 3 Phillips screwdrivers can
be substituted)
Pair only with 60-cell modules.
Pair with 60- or 72-cell modules.
D ) Check that you have these other items:
•
Outdoor-rated, weather-proof AC junction box(es)
•
Gland or strain relief tting (one per AC junction box)
•
Number 2 and 3 Phillips screwdrivers
•
Torque wrench, sockets, wrenches for mounting hardware
•
Adjustable wrench or open-ended wrench (for terminators)
•
Hand-held mirror (to view LEDs on the undersides of the
microinverters)
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
maximum over-current protection device (OCPD).
Service type Max. M250s per
branch circuit
Max. M215s per
branch circuit
Single-phase 240 VAC 16 17
Three-phase 208 VAC 24 25
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 microinverter
AC branch circuit to the breaker in the load center. Design for a voltage
rise total of less than 2% for the sections from the microinverter AC
branch circuit to the breaker in the load center. Refer to the Voltage Rise
Technical Brief at enphase.com/support for more information.
Best practice: Center-feed the branch circuit to minimize voltage rise in
a fully-populated branch.
How It Fits Together
AC
junction box
DC
connectors
AC connector
Enphase
Microinverter
Tie wraps or
cable clips
terminator
Engage
Cable
AC drop on
Engage Cable
© Enphase Energy, Inc. All rights reserved.
INSTALLATION
1
Position the Enphase Engage Cable
A ) Check the labeling on the Engage Cable drop connectors to be sure that
the cable matches the electrical service at the site. Use 208 VAC Engage
Cable at sites with three-phase 208 VAC service, or use 240 VAC Engage
Cable at sites with 240 VAC single-phase service.
B ) Plan the cable length to allow drop connectors on the Engage Cable to
align with each PV module. Allow extra length for slack, cable turns, and
any obstructions.
C ) Many PV modules have a central stiffening brace. Position the connec-
tors so that they do not conict with the braces.
D ) Cut a length of cable to meet your planned needs.
E ) Lay out the cabling along the installed racking for the AC branch circuit.
4
Create an Installation Map
Create a paper installation map to record microinverter serial numbers and
position in the array.
A ) Peel the removable serial number label from each microinverter and afx
it to the respective location on the paper installation map.
B ) Peel the label from the Envoy and afx it to the installation map.
C ) Always keep a copy of the installation map for your records.
2
Install an AC Junction Box/Isolator
A ) Verify that AC voltage at the site is within range:
240 VAC Single-Phase 208 VAC Three-Phase
L1 to L2 211 to 264 VAC L1 to L2 to L3 183 to 229 VAC
L1, L2, to N 106 to 132 VAC L1, L2, L3 to N 106 to 132 VAC
B ) Install an appropriately rated, off-the-shelf junction box or isolator at a
suitable location on the racking.
C ) Provide an AC connection from the AC junction box back to the
electricity network connection using equipment and practices as
required by local jurisdictions.
3
Attach the Microinverters to the PV Racking
A ) Mark the approximate centers of each PV module on the PV racking.
B ) Mount the microinverter right side up and under the PV module,
away from rain and sun. Allow a minimum of 1.9 cm (0.75”)
between the roof and the microinverter. Also allow 1.3 cm (0.50”)
between the back of the PV module and the top of the microinverter.
WARNINGS:
• Install the microinverter under the PV module to avoid direct
exposure to rain, UV, and other harmful weather events.
• Do not mount the microinverter upside down or in a vertical
position that allows water to collect in the DC connector recess
as it may have a harmful effect on the long term endurance of
the unit.
• Do not expose the AC or DC connectors (on the Engage
Cable connection, PV module, or the microinverter) to harmful
weather events before the connectors are mated as it may
result in weather rated damage to the connection.
afx serial
number labels
5
Dress the Cable
A ) Use cable clips or tie wraps to attach the cable to the racking.
B ) Dress any excess cabling in loops so that it does not contact the roof.
Do not form loops smaller than 12 cm (4.75 inches) in diameter.
Keep the drop connector
release holes clear and
accessible.
release holes
cable clip
6
Connect the Microinverters
A ) Remove and discard the temporary shipping cap from the cable
connector and connect the microinverter. Listen for two clicks as the
connectors engage.
B ) Cover any unused connectors with Enphase Sealing Caps. Listen for two
clicks as the connectors engage.
C ) Torque the microinverter fasteners as follows. Do not over torque.
Using an impact driver to tighten the mounting hardware is not
recommended due to the risk of thread galling.
•
6 mm (1/4”) mounting hardware: 5 N m (45 to 50 in-lbs)
•
8 mm (5/16”) mounting hardware: 9 N m (80 to 85 in-lbs)
WARNING: Install sealing caps
on all unused AC connectors
as these become live when the
system is energized by the
utility. Sealing caps are required
for protection against moisture
ingress. Do not use shipping
caps to cover unused
connectors.
To remove a sealing cap or AC connector, you must use an Enphase
disconnect tool or a Phillips screwdriver.
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