Installation Procedure
Installing the Enphase Microinverter System involves several key steps. Each step
listed below is detailed in the following pages.
Step 1 – Measure AC at Electrical Utility Connection
Step 2 – Install the AC Branch Circuit Junction Box
Step 3 – Position the Enphase Engage Cable
Step 4 – Attach the Microinverters to the PV Racking
Step 5 – Dress the Enphase Engage Cable
Step 6 – Terminate the Unused End of the Engage Cable
Step 7 – Connect the Engage Cable to AC Junction Box(es)
Step 8 – Complete the Installation Map
Step 9 – Connect the PV Modules
WARNING: DO NOT connect Enphase Microinverters to the utility grid or
energize the AC circuit(s) until you have completed all of the installation
procedures as described in the following sections.
NOTE: Enphase Microinverters will not begin exporting power until the Envoy
Communications Gateway is installed and has detected all of the
microinverters at the site. In addition, the grid profile must be configured and
the Envoy must have propagated these settings to the microinverters. For
instructions on this procedure, refer to the Envoy Installation and
Operation Manual at http://www.enphase.com/support/downloads.
Step 1 – Measure AC at Electrical Utility Connection
Measure AC line voltage at the electrical utility connection to confirm AC service
at the site. Acceptable ranges are shown in the following table.
230 Volt AC Single Phase
L1 to neutral
NOTE: Be sure the Engage Cable you are using matches the electrical
utility connection at the site. Use 400 Vac (230 Vac three-phase) Engage
Cable at sites with three-phase 230 Vac service, or use 230 Vac Engage
Cable at sites with 230 Vac single phase service. Check the labeling on the
drop connectors to verify the voltage type.
Page 10
207 to 253 Vac
L1, L2, L3 to neutral
Copyright Enphase Energy Inc. 2011
400 Volt AC Three Phase
L1 to L2 to L3
360 to 440 Vac
207 to 253 Vac
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141-00017, Rev 01