Step 10: Connect The Pv Modules; Step 11. Energize The System - enphase C250 Installation And Operation Manual

Step 10: Connect the PV Modules

WARNING: Electrical shock hazard. The DC conductors of this photovoltaic system are
ungrounded and may be energized.
WARNING: PV modules paired with the C250 must have DC conductors that are labeled
"PV Wire" or "PV Cable" to be compliant with NEC 690.35(D) for Ungrounded PV Power
Systems.
NOTE: Completely install all microinverters and all
system AC connections prior to installing the PV
modules.
To connect the modules:
a. Mount compatible PV modules above the microinverters.
b. Connect the DC leads of each PV module to the DC input
connectors of the corresponding microinverter. Repeat for
all remaining PV modules using one microinverter for each
PV module.
c. Check the LED on the underside of the microinverter for
normal start up.
LED State
color
Green Solid
Flashing
Red Flashing
Solid

Step 11. Energize the System

WARNING: Risk of electric shock. Risk of fire. Qualified personnel only may connect the
Enphase Microinverter to the electricity network.
WARNING: Risk of electric shock. Risk of fire. Ensure that all AC and DC wiring is
correct. Ensure that none of the AC and DC wires are pinched or damaged. Ensure that
all AC junction boxes are properly closed.
a. Check that the voltage presented to the microinverters is limited to 248V, line to neutral.
b. Turn ON the AC disconnect or circuit breaker for each microinverter AC branch circuit.
c. Turn ON the main utility-grid AC circuit breaker. Your system starts producing power after a
five-minute wait time.
The Enphase Microinverters begin communicating over the power lines to the Envoy. The time required
for the Envoy to discover all of the
and quality of the power line communications.
24
Meaning
Normal startup
Transition to post start up state
No grid present
(AC breaker is not turned on)
Failed microinverter start up
microinverters varies with the number of microinverters in the system
 2015 Enphase Energy Inc. All rights reserved.
C250 System Installation and Operation
141-00025 Rev 03