enphase Envoy Communications Gateway User manual

INSTALLATION AND OPERATION MANUAL
141-00011, Rev 05
Envoy Communications Gateway

Envoy Installation and Operation
2013 Enphase Energy Inc. 141-00011 Rev 05
2
Contact Information
Enphase Energy Inc.
1420 N. McDowell Blvd.
Petaluma, CA 94954
http://www.enphase.com
[e-mail]
[e-mail]
FCC Compliance
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, you are encouraged to try to correct the interference
by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by the party responsible for compliance may void the
user’s authority to operate the equipment.
Other Information
This Class B digital apparatus complies with Industry Canada ICES-003.
For third-party license information, refer to www.enphase.com/licenses.
For Enphase patent information, refer to http://enphase.com/company/patents/.
Product information is subject to change without notice. All trademarks are recognized as the property of
their respective owners.
For warranty text refer to http://www.enphase.com/warranty.
User documentation is updated frequently; Check the Enphase website
(http://www.enphase.com/support) for the latest information.
Copyright © 2013 Enphase Energy Inc. All rights reserved.

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Table of Contents
Important Information................................................................................................................. 5
Read this First..................................................................................................................................5
Safety Instructions............................................................................................................................5
Audience ..........................................................................................................................................5
The Enphase Envoy Communications Gateway......................................................................... 6
Other Elements in the Enphase System..........................................................................................7
How the Envoy Communications Gateway Works ..........................................................................7
Envoy Installation....................................................................................................................... 8
Planning and Preparation ................................................................................................................8
System Sizing...............................................................................................................................8
Preinstallation Checks..................................................................................................................8
Installation Flow ...............................................................................................................................9
Install the Envoy.............................................................................................................................10
1. Find the Envoy Serial Number...............................................................................................10
2. Register the Envoy.................................................................................................................11
3. Find a Location for the Envoy ................................................................................................12
4. Connect Ethernet and Power Cables.....................................................................................12
5. Connect Power Line Communication Bridges (if required)....................................................13
6. Check the Internet Connection...............................................................................................13
7. Install the Modules and Microinverters ..................................................................................14
8. Check the Envoy’s Progress ..................................................................................................14
9. Wall Mount the Envoy (Optional) ...........................................................................................15
10. Build the Virtual Array ..........................................................................................................16
11. View System Performance in Enlighten...............................................................................16
Envoy Operation.......................................................................................................................17
First Scan for Microinverters..........................................................................................................17
LCD Screen Display at Initial Start Up...........................................................................................18
Initial Communications Check....................................................................................................18
Subsequent Start Up..................................................................................................................18
Normal Operation...........................................................................................................................19
Using the Envoy LCD Menu...........................................................................................................19
Initiating a Scan for New Microinverters ....................................................................................21
Performing a Communications Check .......................................................................................21
Viewing the Grid Configuration ..................................................................................................23
Getting a New IP Address..........................................................................................................24
Enabling a Connection to Enphase............................................................................................25
Disabling a Connection to Enphase...........................................................................................25
Viewing the Envoy Serial Number..............................................................................................26
Selecting a New Locale (Change Language Display) ...............................................................26
How the Envoy Works with Enlighten ............................................................................................27
Using Enlighten to Check Envoy Status ....................................................................................27
Troubleshooting........................................................................................................................28
Power Line Communication Troubleshooting................................................................................28
Issue: The Microinverter Count is Lower than the Number of Installed Units............................28
Issue: Envoy Displays Fewer than Three Bars..........................................................................28
Issue: Envoy Displays Zero Bars...............................................................................................29
Network Basics and Troubleshooting ............................................................................................30
Issue: IP Address Problems.......................................................................................................30
Issue: LCD Screen Displays “-Web” ..........................................................................................30
Issue: LCD Screen Displays “Envoy Failure +Web or -Web” ....................................................30
Issue: LCD Screen Displays "Scanning Inhibited".....................................................................31

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Issue: The Envoy has Good Signal Strength but is Too Far from the Router ...........................31
Issue: Internet Traffic is Slower After Installing an Ethernet Bridge...........................................31
DHCP versus Static IP Addressing............................................................................................32
MAC Filtering..............................................................................................................................32
Firewall Settings.........................................................................................................................32
Replacing an Envoy.......................................................................................................................33
Envoy Local Interface................................................................................................................34
Connecting to the Envoy through the Site’s LAN...........................................................................34
Directly Connecting to the Envoy without a Broadband Router.....................................................34
Home Screen .................................................................................................................................35
Events Screen................................................................................................................................35
Production Screen..........................................................................................................................36
Inventory Screen............................................................................................................................36
Administration Screen....................................................................................................................37
Administration Screen Tasks .........................................................................................................37
Change or View the Grid Profile.................................................................................................38
Clear GFI Tripped Condition......................................................................................................45
Clear DC Resistance-Low Condition .........................................................................................46
Set Up Device Scan Control ......................................................................................................48
ZigBee Device Configuration .....................................................................................................50
Set the Time Zone (optional)......................................................................................................50
Other Administration Tasks........................................................................................................50
Event Messages.............................................................................................................................51
Technical Data..........................................................................................................................59

Envoy Installation and Operation
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Important Information
Read this First
Follow the instructions in this manual. These instructions are key to the installation
and maintenance of the Enphase Envoy® Communications Gateway (Envoy).
To ensure the safe installation and operation of the Envoy, note the following safety
symbols that appear throughout this document to indicate dangerous conditions and
important safety instructions.
WARNING! This indicates a situation where failure to follow instructions may be a safety
hazard or cause equipment malfunction. Use extreme caution and follow instructions
carefully.
NOTE: This indicates information that is very important for optimal system operation. Follow
instructions closely.
Safety Instructions
Perform all electrical installations in accordance with all local electrical codes and the
National Electrical Code (NEC), ANSI/NFPA 70.
Do not attempt to repair the Envoy; it contains no user-serviceable parts. Tampering with or
opening the Envoy will void the warranty. If the Envoy fails, contact Enphase Customer
Support for assistance ([e-mail]).
Warranty void if cover removed.
Refer servicing to qualified personnel.
Before installing or using the Envoy, read all instructions and cautionary markings in the
technical description and on the Envoy.
Audience
This manual is intended for use by professional installation and maintenance personnel.

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The Enphase Envoy Communications Gateway
The Envoy® Communications Gateway is an integral component of the Enphase® Microinverter
System™. It operates between the Enphase Microinverters and the Enphase Enlighten® web-based
monitoring and analysis software. The Envoy functions as a gateway and monitors the microinverters that
are connected to the PV modules. The Envoy collects energy and performance data from the
microinverters over on-site AC power lines. It then forwards that data to Enlighten, via the Internet, for
statistical reporting.
The three key elements of an Enphase system are the:
Enphase Microinverter
Enphase Envoy Communications Gateway
Enphase Enlighten web-based monitoring and analysis software
This integrated system maximizes energy harvest, increases system reliability, and simplifies design,
installation and management. The following diagram shows the Envoy in the system.

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Other Elements in the Enphase System
The Enphase Microinverter converts the DC output of the PV module into grid-compliant AC power. In
addition to performing the DC to AC conversion, it maximizes the PV modules’ energy production by
using a sophisticated Maximum Power Point Tracking (MPPT) algorithm. This integrated system
maximizes energy harvest, increases system reliability, and simplifies design, installation and
management.
The Enphase Enlighten web-based monitoring and analysis software analyzes the data collected by each
communicating microinverter. Enlighten automatically detects any shortfall in energy production, identifies
possible causes, and suggests solutions. Enlighten constantly monitors every Enphase Microinverter
connected to the Envoy and is essential for detailed monitoring and troubleshooting.
How the Envoy Communications Gateway Works
Installation and operation of the Envoy require no specialized equipment or unique computer or
networking expertise. To the Local Area Network (LAN), the Envoy is just another host on the network,
much like a personal computer. The Envoy simply connects to the on-site router for communications with
the Enphase Enlighten monitoring and analysis website. The Envoy communicates with the individual
microinverters using the existing power lines in the residence or business.
After the Envoy is installed and completes its initial scan, it maintains an internal database of all known
Enphase Microinverters at the site it manages. At regular intervals, the Envoy polls each microinverter for
its energy data. Using the site’s broadband router, the Envoy then forwards that information to Enlighten.
The Envoy also reports any error conditions that affect it or the microinverters. You can view both energy
data and error conditions in Enlighten.
The Envoy incorporates power line and Internet communications functions. As shown in the following
diagram, one "side" of the Envoy communicates with the microinverters through power lines at the site.
The other "side" of the Envoy communicates with the Internet using a standard Ethernet cable plugged
into the broadband router.

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Envoy Installation
Planning and Preparation
Review the following preinstallation checks and sizing considerations before you install the Envoy.
System Sizing
The Envoy is capable of servicing a large system of Enphase Microinverters. This number varies with
Envoy model. Check the model number (SKU) on the Envoy box, or on the back of the Envoy, to
determine which model you are installing. Check the following table for capacity information:
Envoy model number
(SKU)
Number of microinverters
monitored
ENV-120-01
500
IEMU-03
250
NOTE: When multiple Envoys are required at a single site, see our tech briefs on
commercial design at http://www.enphase.com/support.
Preinstallation Checks
Before installing the Envoy, make sure that the site has a standard AC outlet available near the load
center. Do not use a power strip.
To use Enlighten web-based monitoring and analysis software, additional requirements are:
Always-on broadband Internet connection
Broadband router with spare Ethernet port
Up-to-date web browser to view Enlighten. Supported browsers are Internet Explorer 8 or
higher, Firefox 11 or higher, Chrome 5 or higher, and Safari 5 or higher. Enlighten requires
Adobe Flash Player 10 or higher. For Internet Explorer 8 users, install the Google Chrome
Frame plug-in. Enlighten is compatible with Internet-enabled mobile devices running iOS 5 or
higher and Android 4 or higher.
Check the Envoy shipping box for the following items:
Envoy Communications Gateway
Ethernet cable
AC power cord
Power line communication bridges (included with some Envoy models)
Envoy Communications Gateway Quick Install Guide

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Installation Flow

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Install the Envoy
To install the Envoy, perform the following steps while referring to the diagram shown.
BEST PRACTICE: When powered up and connected for the first time, the Envoy may
retrieve an automatic upgrade from Enphase. Because this upgrade may take up to 20
minutes, connect the Envoy first at the site (connect to both AC power and the broadband
router) so that it performs the upgrade well before the solar module installation is complete.
WARNING! Do not remove power from the Envoy if the LCD displays:
“Upgrading. . . Do Not Unplug.”
1. Find the Envoy Serial Number
The serial number label is on the back of the Envoy, near the left mounting bracket.
You can build the system map manually, by peeling the serial number label from the Envoy and placing
the label on the installation map, or you can use the ArrayGun feature from the Enphase Installer Toolkit
to easily build and configure a system. Refer to http://enphase.com/products/arraygun/ for more
information.
a. To manually build
the installation map:
b. Remove the
Envoy’s removable
serial number label.
c. Attach the serial
number label to the
microinverter
installation map, or
make note of it for
registration in the
next step.
If needed, you can find
an installation map at
the back of the
Enphase Microinverter
manual.

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2. Register the Envoy
Register the Envoy at the beginning of
the PV installation.
a. Use your previously issued
username and password to
log in to in Enlighten.
If you haven’t registered, go to
www.enphase.com and click
Enlighten Login.
b. At the installer dashboard,
click Add a New System.
If you have already registered
the site, find the system under
Installations in Progress.
c. Under System, enter the
system name, type and
installer reference (optional).
d. Under Owner, enter the
name, email, and phone.
e. Under Location, enter the
country, installation site
address information.
f. Under Envoy, enter the Envoy
serial number
NOTE: If you have selected a
country other than the US, or if
you select Hawaii as the state
under Location, the Grid
Profile menu appears.
g. If required, select the
appropriate profile from the
Grid Profile menu. Skip this
step in the continental US
because the factory settings
meet requirements.
h. Under Modules, enter total
number of modules, type, etc.
For information on Grid Profiles or on
using the Envoy Interface to check or
set the Grid Profile, see “Change or
View the Grid Profile” on page 38.
i. Click Save to submit the form.
You will receive a confirmation
message: “Activation Created
Successfully.”

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3. Find a Location for the Envoy
Enphase recommends that you place the Envoy as close to the load center as possible. This ensures that
the Envoy receives the strongest possible communications signal from each microinverter. Place the
Envoy indoors or in an environmentally protected location. For wall mounting instructions, see “Wall
Mounting” on page 15.
a. Locate an indoor AC outlet close to the site’s load center.
b. Place the Envoy so that its AC cord can reach this outlet.
As an alternative if signal strength is poor, power the Envoy from the solar production circuit (where local
electrical code allows for monitoring equipment on the same circuit). This provides the best possible
power line communications. Remember that you must locate the Envoy indoors (a garage, attic,
basement, or other cool, dry location) or in an outdoor weatherproof enclosure. Remember also that the
Envoy must also have Ethernet access via the broadband router, either directly with a CAT5 cable or via
power line communication bridges.
4. Connect Ethernet and Power Cables
The Envoy needs to obtain a DHCP (Dynamic Host Configuration Protocol) IP address and have a route
to the Internet. The Envoy will request a dynamically assigned (DHCP) IP address from the broadband
router during the power-up sequence. Two small green LEDs on the Ethernet port indicate Internet link
and activity. One LED lights solid green, and the other blinks green every few seconds.
a. Plug the Ethernet cable into the Ethernet port on the Envoy.
b. Plug the other end of the cable into a spare port on the broadband router.
NOTE: Next to the Ethernet port on the Envoy, there are one or two USB ports. You can use
these ports to connect optional devices, such as a wireless communication device for the
Enphase Environ Smart Thermostat or Revenue Grade Meter (RGM).
c. Plug the AC power cord into the AC input on the Envoy.
d. Plug the other end of the power cord into a dedicated 120VAC outlet (not a power strip). For best
results, the outlet should be near the load center.
WARNING! Do not remove power from the Envoy if the LCD displays:
“Upgrading. . . Do Not Unplug.”
WARNING! Do not plug the Envoy into a power strip, surge protector, or uninterruptable
power supply (UPS).
The surge suppression or filtering from a power strip or other protective device will impede
power line communication performance. Also, if possible, do not plug a power strip into the
same outlet that the Envoy is using. The surge suppression or filtering components of a
power strip may still interfere with communications if they are near the Envoy.

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5. Connect Power Line Communication Bridges (if required)
If you need to locate the Envoy away from the router, at a distance where an Ethernet cable is not
practical, use power line communication bridges with the Envoy or purchase a wireless Ethernet bridge.
Bridges allow the Envoy to communicate with the broadband router without the need for additional
Ethernet cabling. To install the power line communication bridges:
WARNING! Do not remove power from the Envoy if the LCD displays:
“Upgrading. . . Do Not Unplug.”
a. Plug one of the bridges into the same AC outlet that the Envoy is using.
b. Connect one end of the Ethernet cable
into the Ethernet port on the Envoy.
c. Connect the other end of that Ethernet
cable into the bridge.
d. Plug the other bridge into an AC outlet
near the broadband router.
e. Connect one end of a second Ethernet
cable into the second bridge.
f. Connect the other end of that Ethernet
cable into the broadband router.
g. If the broadband router is operational,
press and hold the Envoy menu button.
Release the button when the LCD
displays Get New IP Address. Wait for
15 minutes. If this fails, unplug the
Envoy, wait for 20 seconds, and plug it
back in. Wait 5 minutes for connection.
6. Check the Internet Connection
a. Look for the “+Web” indication.
b. If it still shows “-Web” 5 minutes after connecting to the broadband router, see “Network Basics
and Troubleshooting” on page 30.
NOTE: Power production shows as 0W and
0kWh (see definitions of W and kWh on
page 19) until the microinverters are
discovered and microinverter monitoring
begins. Power production also shows 0W
and 0kWh for about a minute whenever the
Envoy powers up.
192.168.2.140 +Web
0W 0kWh 0

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7. Install the Modules and Microinverters
a. Install the PV modules and the microinverters as directed by the installation manuals.
b. Use the ArrayGun to scan the microinverters. For more information, go to http://enphase.com.
c. As an alternative, you can manually build the map: peel the removable serial number label from
each microinverter and affix it to the respective location on the map
8. Check the Envoy’s Progress
a. Check the device count (shown as “2” in the illustration). An automatic device scan will to detect
microinverters when the DC and AC connections are completed and the AC circuit is energized. If
the device scan isn't running, start a new one:
Press and hold the Envoy menu button (on the right side of the Envoy).
Release the button when the LCD window displays Enable Device Scan.
b. Check the power line communications. The
number of “Level” bars on the Envoy LCD
Level/Devices screen should be three or more.
(The illustration shows three bars.) If there are
fewer than three bars, see “Power Line
Communication Troubleshooting” on page 28. If the communication check isn't running, start a
new one:
Press and hold the Envoy menu button (on the right side of the Envoy).
Release the button when the LCD window displays Enable Communication Check.
NOTE: The Envoy may display “Priority Scan is Active” on the LCD screen during the device
scan.
c. Check that the Envoy LCD shows a complete device count after about 20 minutes. If it does not,
see “Power Line Communication Troubleshooting” on page 28.
d. Check that all microinverters are discovered. As soon as all microinverters at the site have been
discovered, use the Envoy Device Scan Control menu to stop the device scan:
Press and hold the Envoy menu button (on the right side of the Envoy).
Release the button when the LCD window displays Disable Device Scan.
NOTE: The number of devices shown in the Device Scan screen may not match the number
of devices shown on the Home screen until the device scan is complete.
NOTE: For sites with neighboring Enphase systems, do not allow a device scan to run
overnight because it may discover neighboring microinverters when they first power-up in the
morning. Always stop the device scan in the afternoon, before leaving the site.
e. Refer to “LCD Screen Display” on page 18 for more information.
Level: [ ]
Devices: 2

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9. Wall Mount the Envoy (Optional)
NOTE: Before mounting the Envoy, it is best to perform a Communications check, as
described on page 21, to find the best location for your Envoy.
After you have positioned your Envoy for optimal communications and after it has detected all devices,
you can mount the Envoy on a wall. To do this:
a. Use two drywall screws or wall anchors (not included) to affix the Envoy to the wall, mounted at
the dimensions shown. You will need two #8 screws (4.17 mm or 0.16 in. diameter); maximum
screw head diameter is 8.9mm (0.35 in.).
b. Slide the Envoy onto the mounting screws, aligning the Envoy screw holes with the screws as
shown.

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10. Build the Virtual Array
When the system is energized and the Envoy detects at least one microinverter, create the virtual array in
Enlighten from the installation map you created.
You can scan and upload the paper copy of the Installation Map, or you can use the ArrayGun feature
from the Enphase Installer Toolkit to easily build and configure a system. Refer to
http://enphase.com/products/arraygun/ for more information.
To build the virtual array manually:
a. Log into Enlighten.
b. Use Array Builder to create the
virtual array in Enlighten.
c. Use your installation map as
your reference.
To see the Array Builder demo, go to
http://enphase.com/support/videos.
Once the virtual array is built, Enlighten
displays a graphic representation of the
PV system. It also shows detailed
current and historical performance
information.
11. View System Performance in Enlighten
Once the array is built and the system is activated, you can log in to Enlighten to view site data.
If you have not done so already, log in to Enlighten to view system data.
Refer to “How the Envoy Works with Enlighten” on page 27 for more information.

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Envoy Operation
First Scan for Microinverters
A newly installed Envoy automatically performs an initial scan to discover all of the microinverters that are
installed and powered up at the site. This initial scan continues to search for new microinverters for eight
hours from initial start up of the Envoy. This one-time scan is not repeated automatically. During the scan,
you will notice some values increasing on the Envoy display.
NOTE: If the eight-hour scan expires before installation of microinverters is complete, you
must initiate a new scan. To start a new device scan, see page 21 of this manual.
NOTE: If the Envoy was not factory built with software release 3.2, the initial scan will run for
seven days. With release 3.2, the initial scan time was reduced from seven days to eight
hours. If the Envoy upgrades to release 3.2 after an initial scan has begun, the initial scan
duration remains at seven days.
WARNING: Stop the scan once all of the devices are detected (see page 14). For sites with
neighboring Enphase systems, do not allow the device scan to run overnight because it may
discover neighboring microinverters when they first power-up in the morning.
The Envoy identifies each device by its unique serial number. If a microinverter is added or replaced at
the site, you must initiate a new scan so that the Envoy can discover the new microinverter. To start a
new device scan, see page 21 of this manual.
After the Envoy has detected at least one new device, it automatically enters Priority Scan mode. The
LCD screen displays the following, where “nnnn” represents the number of microinverters (devices)
detected.
When the Envoy does not detect a new device during a polling interval (usually 5 minutes), it exits Priority
Scan mode. If, subsequently, the Envoy detects another new device, it returns to Priority Scan mode. It
remains in this mode until it again completes an interval where no new devices are detected.
Priority Scan is
Active. Devs: nnnn

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LCD Screen Display at Initial Start Up
When the Envoy starts up for the first time, it goes
through the initial boot sequence. During this initial
boot sequence, the Envoy LCD screen displays
startup progress as shown:
Initial Communications Check
The last two screens in the initial sequence
alternate until the Communications Check ends, after
20 minutes. The Envoy normally displays
"-Web" for two to three minutes after the first start up.
It then sends the first report to Enlighten. When
Enlighten responds, the Envoy displays “+Web”.
Subsequent Start Up
After a power outage or Envoy shut down, the Envoy
is ready to work just five minutes after reapplying
power. You will know the Envoy has completed
booting and has started normal operation when it
displays both an IP address and the “+Web” status
indication in the LCD screen. The normal, post-
installation boot sequence is similar to the initial start
up, although the “Initializing Data” screen is not
repeated.
[e] Enphase Energy
Booting [||||||]
Starting R3.2.0
2013/05/30 16:21:20
169.254.120.1 -Web
0W 0kWh 0

Communications check
Searching Devices
192.168.2.140 +Web
0W 0Wh 0
Level: [ ]
Devices: 2
Initializing Data
2013/05/30 16:21:20

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Normal Operation
Once the Envoy completes a scan, normal operation begins or resumes. At this point, the indicators in the
LCD screen show current values for your system. This is the home screen:
It may be a few minutes before energy data appears or increases on the home screen after starting up
the Envoy or initiating a scan. Information shown during normal operation includes:
Local IP address, for example: 192.168.2.140 (your actual local IP address will be different). The
Envoy attempts to get a dynamically assigned DHCP IP address during power-up sequence. The
Envoy uses the DHCP IP address as a route to the Internet. If 169.254.120.1 is shown, the Envoy
has not yet acquired a dynamic IP. Refer to “Troubleshooting” on page 28, if this address
continues to display.
Web connection indication: +Web. The web status indicates whether the Envoy is connected to
Enlighten. The status -Web indicates that the Envoy is not connected to Enlighten.
Indication of the present power-production, in watts: (n)W (where n is a number)
Indication of the life time kilowatt hours reported to this Envoy: (n)kWh (where n is a number)
Indication of the number of online microinverters producing power, reporting in to the Envoy, and
not having any error conditions: (n) (where n is a number). At night, the number of microinverters
displayed is zero.
After the Envoy establishes an IP address and the web connection, the Envoy periodically contacts an
NTP (Network Time Protocol) server to maintain an accurate local time.
Using the Envoy LCD Menu
Use the Envoy Menu button
located on the right side of the
Envoy to access the Envoy
LCD menu.
1. Press and hold this
button. After two
seconds the Envoy
menu appears in the
Envoy’s LCD screen.
2. Continue holding the
Menu button. Menu
items appear in the
following order:
192.168.2.140 +Web
2407W 783kWh 25
Menu
Button

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3. To select a menu item, release the Menu
button when the desired menu item appears.
The menu continues to cycle as long as you
are pressing the Menu button. The Exit
Menu option returns to the normal (default)
display, usually the Home screen. See the
following sections for detailed procedures.
Exit Menu
Enable
Device Scan
Disable
Device Scan
Enable
Communication Check
Disable
Communication Check
View Grid
Configuration
Get New IP Address
Enable Connection
To Enphase
Disable Connection
To Enphase
View Serial Number
Select New Locale