enphase M250 Quick Install Manual

Q U I C K I N S T A L L G U I D E
Replacing Enphase M215 and M250 Microinverters
Read and follow all warnings and instructions in this guide. Safety warnings are listed on the back of this guide. Use this procedure to replace a failed M215
Microinverter™ or M250 Microinverter™ using the parts provided in the replacement kit. Read and understand the safety information at the back of this
guide before installing the replacement microinverters.
The Enphase Microinverter models listed in this guide do not require grounding electrode conductors (GEC), equipment grounding conductors (EGC), or
grounded conductor (neutral). The microinverter has a Class II double-insulated rating, which includes ground fault protection (GFP).
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 Enphase Envoy to track system installation progress. To
download, go to enphase.com/toolkit
at right.
B ) Refer to the following table to check module pairing for your kit.
Kit Model DC adapter (dongle)
M215208-IQ7-S22-RMA Q-DCC-2
M215208-IQ7-S25-RMA Q-DCC-5
M215240-IQ7-S22-RMA Q-DCC-2
M215240-IQ7-S25-RMA Q-DCC-5
M250208-IQ7-S22-RMA Q-DCC-2
M250208-IQ7-S25-RMA Q-DCC-5
M250240-IQ7-S22-RMA Q-DCC-2
M250240-IQ7-S25-RMA Q-DCC-5
• M215 Microinverters are compatible only with 60-cell PV modules.
• M250 Microinverters are compatible with 60-cell or 72-cell PV modules.
C ) In addition to the Enphase Microinverters, PV modules and racking,
check that you have the following items:
• Q Connectors: either Q-DCC-2 (MC-4 dongle) or Q-DCC-5 (UTX
dongle) - included in the kit
• AC adapter (Q-ET-2LL) - included in the kit
• Cable ties or cable clips (Q-CLIP-100)
• Sealing caps for unused Engage connectors, if needed (ET-SEAL)
• Enphase Disconnect Tool (Q-DISC-10)
• Tools: screwdrivers, voltmeter, torque wrench, sockets, and
wrenches for mounting hardware
D ) Protect your system with lightning and/or surge suppression devices.
It is also important to have insurance that protects against
lightning and electrical surges.
AC
junction box
or scan the QR code
Microinverter
M215IQ7-208
M215IQ7-240
M250IQ7-208
M250IQ7-240
DC
connectors
© 2018 Enphase Energy, Inc. All rights reserved.
E ) Check that 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).
M215
Maximum*
(240V single phase)
Enphase
17
Microin-
verters per
M215
AC branch
(208V three phase)
circuit
25
* Limits may vary. Refer to local requirements to define the number of microinverters per
branch in your area.
F ) Use your paper installation map to record device serial numbers and
positions in the array. You will scan this map later using Installer Toolkit
and your mobile device. The map is essential for system troubleshoot-
ing later, if needed.
Peel the removable label from each replacement microinverter and
•
affix it to the paper installation map.
Always keep a copy of the installation map for your records.
•
G ) Size the homerun AC wire gauge to account for voltage rise. Select
the correct wire size based on the distance from the beginning of the
Engage Cable to the breaker in the load center. Design for a voltage rise
total of less than 2% for these sections.
Best practice: Center-feed the branch circuit to minimize voltage
rise in a fully-populated branch.
Tie wraps or
cable clips
AC connector
Adapters and
dongles
NOT SHOWN
Replacement
Microinverter
M250
(240V single phase)
16
M250
(208V three phase)
24
terminator
Engage
Cable
AC drop on
Engage Cable