Envoy-S Installation and Operation
2016 Enphase Energy Inc. 141-00031 Rev 01
3. Install CTs for Metering (Model ENV-S-WM1-230 only)
The Envoy-S Metered (ENV-S-WM1-230) uses terminal blocks for metering connections. Install one CT
for production metering and one CT for consumption metering as described in this section. You must use
a protected route in conduit for the CT wires to the Envoy-S. If you need to extend the leads (up to 213
meters), see “Extend Consumption CT Leads, If Needed” on page 17.
When wiring the Envoy-S for production and consumption metering, be sure to install
the current transformers (CTs) exactly as described for your application.
When using CTs, do not energise the Envoy-S or the microinverters before the CT
installation is complete.
Do not install the CTs in a panel where they exceed 75% of the wiring space of any
cross-sectional area within the panel, or refer to local standards for guidance.
You can run more than one wire through the CT if all wires are on the same phase
and they fit the opening in the CT.
Install the CT for Production Metering
DANGER! Risk of electrocution! CTs must be installed with no current flowing in the sensed
circuit. Always install CT wires in the terminal blocks before energising the sensed circuit.
DANGER! Risk of electric shock. Be aware that installation of this equipment includes risk of
electric shock. If you wire the Envoy-S at the sub-board, always de-energise the sub-board
before beginning wiring.
a. Locate the arrow on the CT label.
b. Clamp the CT on Line (active) of the solar production circuit with the arrow pointing towards the
load.
c. Connect the white wire to the “IA•” terminal.
d. Connect the blue wire to the “IA” terminal.
e. Tighten the terminal block screws to 0.56 Nm.
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