Hawaii Solar Blog

PV Internet Reboot Instructions for Enphase Envoy

If Haleakala Solar has installed Enphase Microinverters to maximize your solar energy generation, you get a monthly email with your system’s production report. Some of our customers have received a report showing zero production, but this does NOT mean their system is not producing anything. The vast majority of time it simply means the Internet connection has been lost and the Enphase Envoy® Communications Gateway™ can’t deliver the data to the website. In most cases, this is an easy fix and one you can perform yourself with the instructions below.

Your Envoy / Energy Management Unit (EMU)

Enphase system elements
Your Envoy aka Energy Management Unit (EMU) collects energy and performance data from the microinverters that are connected to the PV modules. The Envoy then forwards that data to Enlighten, via the Internet, to compile your report. If your Internet connection is down, the production report will show zero.

Enphase Envoy

Look at the front display on your Envoy/EMU.
The screen initially shows 5 pieces of information.
1. Top left is the unique IP web address of the Envoy/EMU unit.
2. Top right is either “+Web” or “–Web”. If +Web it means the Envoy/EMU is communicating through the Internet. If –Web then it means that at that moment it is not communicating.
3. Bottom left is the reading of the total present power production in watts.
4. Bottom center is the reading for total lifetime kilowatt hours reported to this Envoy/EMU unit.
5. Bottom right is the number of microinverters reporting to this Envoy/EMU. There is one microinverter for each PV panel. So this is also the number of panels reporting power production.

Bridges – Important Point To Remember

Enphase Energy bridgeMake sure the dark gray “bridge” connected to your router is always plugged directly into its own electrical outlet and not a power strip. Power strips “clean” the electrical signal and prevent the communication link that is needed to transmit your PV system’s data via the Internet to your Enlighten website. These bridges can be either dark gray colored and say “Enphase Energy” on the top or white Tenda or Netgear brands. You have 2 bridges that are about 2 inches wide by 3 inches tall. The bridge near the Envoy/EMU will be plugged into the electrical outlet within the same box containing the Envoy/EMU. The bridge inside your house is the one to remember to keep plugged directly into the wall outlet, even if you later remodel or reorganize your computer cords. The bridge will have an Ethernet cable connecting it to your router – preferably at the port closest to where the modem cable comes into the router.


What to do if your Envoy/EMU stops reporting data to your Enlighten website:

  • If you check your Enlighten website and it doesn’t show any current PV power data, then generally you’ve lost the Internet connection and it needs to be reset.
  • First, check the display on your Envoy/EMU.
  • If the upper right shows “-Web” then it confirms that the unit is not communicating over the Internet. If there are numbers on the bottom left, and center, and the bottom right number matches the number of PV panels you have, then it is simply a matter of restoring the Internet connection.

Restoring Your EMU’s Internet Connection

There are 5 Pieces of Equipment to Unplug and Re-boot. Unplug the power from all 5 devices first and then begin re-booting with the following steps:

  • Modem: This will be somewhere near your computer. Plug it back in and wait 60 seconds before proceeding to the next step.
  • Router: This will also be near your computer. Unplugging both the Internet cord and the power cord is best. Plug it back in and wait 60 seconds before proceeding to the next step.
  • Inside Bridge: Plug it back in and wait 60 seconds before proceeding to the next step.
  • Outside Bridge: Located in the EMU metal box on the outside of house. Plug it back in and wait 60 seconds before proceeding to the next step.
  • Envoy/EMU: The EMU box is labeled and located on the outside of your house as described above. When you plug it back in it will begin its cycle with “INITIALIZING.” This normally takes about 5 minutes to reboot itself and start scanning for inverters. It can take up to 20 minutes to complete the process and reconnect to the Internet. If it comes back up with “+Web” then check to make sure the number on the bottom right matches the number of PV panels you have. If it does, then you’re done as everything has been reset back to normal and the data will soon be available online again.

Whenever the Envoy/EMU has been offline and then is brought back online, the system will first catch up with oldest data and once caught up will display current data, so expect some time (24-48 hours) before the output on the computer matches what you expect to see. The microinverters send information every 5 minutes to the Envoy/EMU, and the Envoy/EMU sends data to your website via the Internet every 15 minutes. The data can be stored for several weeks before it reaches its memory limit. So all the old data needs to get caught up before it is current when viewed online. But you can be confident that the Envoy/EMU unit is tracking and monitoring your panels and the information will be available for you to view online.

If you would like assistance with this process, please don’t hesitate to contact the Service Department on your island.

Oahu – (808) 523-3305
Maui – (808) 871-8654
Kauai – (808) 246-8866

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