After 6 months of trying to find someone to help with non functioning Givenergy batteries and inverter, I contacted Ron at STS who remotely sorted the problem within days. Highly recommended.
Francesca Pomlett · Oct 2026 Google
Setup guide · Enphase Energy
Enphase Envoy WiFi Setup — Reconnect to New Router
Changed your router, updated the WiFi password, or switched ISP — and now Enlighten shows your system as offline. The Envoy is still trying to connect to the old network. It needs reconfiguring to connect to the new one. In the meantime, it's normally only the monitoring data stream that's interrupted: the microinverters usually keep running while the Envoy is offline, so check your generation meter.
from £195 on-site WiFi setup · extender £75 extra if needed
- Not affiliated with Enphase Energy
- Free step-by-step guide
- All Envoy & IQ Gateway models
Cannot get the Envoy to reconnect?
If you have tried the steps below and the Envoy still will not connect to your new WiFi network, we can set it up on site, from £195.
Book on-site WiFi setupBack to Enphase hubIndependent — not affiliated with Enphase Energy Inc.
Absolutely fantastic customer service. The team were incredibly helpful, responsive and genuinely willing to do everything they could to help get things sorted. With all the uncertainty surrounding the future of GivEnergy at the moment, it was particularly reassuring to have people who were knowledgeable, approachable and prepared to step in when needed. After a glitch with my firmware update caused problems with my system, these guys really did come in and save the day. They took the time to investigate the issue, explain what was happening and work towards getting everything back up and running. It’s refreshing to deal with a company that genuinely seems to care about its customers and is willing to go the extra mile when something goes wrong. Superb service from start to finish. Many thanks for all the help and support — it’s very much appreciated. Highly recommended.
robert lee · Sep 2026 Google
Superb work from Ronald. Cannot recommend highly enough. Figured out my problem late into night, going above and beyond! Many thanks to him
rohit s · Jul 2026 Google
Excellent knowledge and service. Ron responded to my initial query really quickly (same day), and confirmed that he could add extra panels and battery to my existing GivEnergy setup - something I’d been told by other installers wouldn’t be possible. Two weeks later (!), scaffolding was up and Ron and his team were on site to fit the extra 5 panels and two more GivEnergy batteries. I now have a truly optimised system, which has made the most of the south facing roof space I have, without having to start again with new kit. I’m now generating enough on the solar to fill my batteries, and avoid using the grid. I’ve also exported far more than before. Brilliant experience, well recommended.
Mark Emery · Jul 2026 Google
Ron was very knowledgeable and patient as we worked through the cause of Givenergy Hybrid Inverter suddenly failing (with 0W grid). He was able to quickly identify the probable cause, and point me in the right direction to identify the ‘burnt out’ AC isolator switch & piece of cable, which I was able to find a local electrician to replace. The best £95 I have spent. Thanks Ron.
Martin Smith · Aug 2026 Trustpilot
What an amazing service. They got my solar inverter back up and running after a firmware update went wrong. It is a breath of fresh air to deal with such a professional company.
Richard Street · Sep 2026 Google
What you need before starting
New WiFi password — the password for your current router
Installer Toolkit app — free from App Store / Google Play
Physical access to Envoy — to press the AP mode button
Enphase account — or create one at enlighten.enphaseenergy.com
Setup
6-step Envoy WiFi reconnection
Follow these steps to reconnect your Enphase Envoy to a new WiFi network after a router change, ISP switch, or password update.
1
Confirm the Envoy has lost its WiFi connection
Check the Envoy LED indicators. The network LED should be solid green when connected to the internet. If it is off, flashing, or amber, the Envoy has no internet connection.
Also check Enlighten — if the system shows as offline and the last data update was around the time you changed your router, the Envoy is still trying to connect to the old network. In the meantime, the microinverters usually keep running while the Envoy is offline, so check your generation meter.
2
Download the Enphase Installer Toolkit app
The Installer Toolkit app is the recommended method for reconfiguring Envoy WiFi. Download it from the Apple App Store or Google Play Store — search for "Enphase Installer Toolkit".
You need an Enphase account to log in. If you do not have one, create one using the email address associated with your Enlighten system. The app connects directly to the Envoy over its local AP mode network, so your phone does not need to be on your home WiFi to use it.
3
Put the Envoy into AP mode and connect your phone
Press the AP mode button on the Envoy — a small recessed button, usually on the side or bottom of the unit. Press and hold for about one second. The AP mode LED will begin flashing, indicating the Envoy is broadcasting its own WiFi network.
On your phone, go to WiFi settings and look for a network named ENVOY_ followed by the serial number. Connect to this network.
Your phone may warn that there is no internet — this is expected. You are connecting directly to the Envoy, not to the internet. Do not dismiss or switch back to your home WiFi until the setup is complete.
4
Configure the new WiFi network via the Installer Toolkit app
Open the Installer Toolkit app while connected to the Envoy AP network. The app should detect the Envoy automatically. Navigate to the network configuration section.
Select your new home WiFi network from the list of available networks. Enter the WiFi password carefully — the most common cause of failed reconnection is a mistyped password. Passwords are case-sensitive.
The Envoy will attempt to connect to your new router. If the connection succeeds, the network LED will turn solid green within a few minutes. If it fails, re-enter the password and try again.
5
Use ethernet as a fallback if WiFi will not connect
If the Envoy cannot connect to your WiFi — weak signal, incompatible settings, or repeated failures — connect it directly to your router with an ethernet cable. The Envoy has an ethernet port on the underside or rear panel.
Plug one end into the Envoy and the other into a spare LAN port on your router. The Envoy detects the wired connection automatically and prioritises it over WiFi. Ethernet is more reliable and eliminates intermittent monitoring gaps.
If the Envoy is too far from the router for a direct cable, a powerline ethernet adapter can bridge the distance using your home's electrical wiring. These cost around £30–40 and provide a permanent, reliable connection.
6
Verify Enlighten is receiving data again
After reconnecting, wait 15 to 30 minutes, then check Enlighten. The system should show as online and new production data should begin appearing. If the Envoy was offline for less than seven days, it will automatically backfill the missing data from its local buffer.
If Enlighten still shows no data after 30 minutes, check the Envoy network LED. Solid green means the connection is established and Enlighten may just need time to update. If the LED is not green, the WiFi connection was not established — repeat the setup process or switch to ethernet. If it still won't connect, we set it up on site, from £195: we connect it to your WiFi, set up your router, including a separate 2.4 GHz network if it needs one, and check it's reporting.
Why the Envoy does not reconnect automatically after a router change
When you replace your router or change your WiFi password, the Envoy loses its connection and cannot automatically discover the new network. Unlike a phone or laptop that prompts you to enter the new password, the Envoy has no screen and no way to ask. It continues trying to connect to the old network indefinitely until someone manually reconfigures it.
This is by far the most common reason for Enphase systems going offline in the UK. ISPs regularly send new routers when customers upgrade their broadband package, and the new router has a different network name and password. The homeowner sets up their phones and laptops on the new network but forgets the Envoy, because it is tucked away in a cupboard and nothing in the house seems any different.
Meanwhile, the microinverters usually keep running while the Envoy is offline, so check your generation meter. If the meter is still going up, the system is still generating and the only thing that has stopped is the data upload to Enlighten. If you notice within seven days, the Envoy's local buffer will backfill the missing data when reconnected. After seven days, the data gap is permanent. For this reason, it is worth reconnecting the Envoy as soon as possible after any router change — and for long-term reliability, ethernet is always preferable to WiFi.
Reference
Common WiFi setup issues and solutions
AP network not visible
Cannot see the ENVOY_ network on your phone
Press and hold the AP mode button again for one second. Wait 30 seconds for the network to appear. If still not visible, try from a different phone. Some older Envoy models broadcast on 2.4GHz only — if your phone is set to 5GHz preferred, it may not see the network.
Password rejected
Envoy will not accept the WiFi password
Double-check the password is correct — case-sensitive, no trailing spaces. If the router uses WPA3, the Envoy may not be compatible — switch the router to WPA2 or WPA2/WPA3 mixed mode. Some mesh routers require the 2.4GHz band to be enabled separately.
Connects then drops
LED goes green briefly then returns to amber or off
WiFi signal at the Envoy location is too weak to maintain a stable connection. Move the router closer, use a WiFi extender, or switch to ethernet. If the signal still won't reach, we can fit a WiFi extender on site: our WiFi setup visit is from £195, and the extender is an extra £75. See our monitoring gap guide for more on intermittent connectivity.
5GHz not supported
Envoy only sees 2.4GHz networks
Most Envoy models only support 2.4GHz WiFi. If your router broadcasts separate 2.4GHz and 5GHz networks, select the 2.4GHz network. If the router combines both bands under one name, the Envoy should connect to the 2.4GHz band automatically.
Installer Toolkit login
Cannot log into the Installer Toolkit app
You need an Enphase account. If your installer set up the system under their account, you may need to create your own at enlighten.enphaseenergy.com. Some features require "homeowner" role access. If you are locked out, STS can help recover or transfer Enlighten access.
Envoy WiFi setup — common questions
Download the Enphase Installer Toolkit app. Press the AP mode button on the Envoy to broadcast its local WiFi network. Connect your phone to the ENVOY_ network. Open the app, navigate to network settings, select your new home WiFi, and enter the password. The Envoy will connect to your new router and resume uploading to Enlighten. If WiFi fails, connect the Envoy to your router with an ethernet cable instead.
AP mode (Access Point mode) is when the Envoy broadcasts its own temporary WiFi network so you can connect to it directly from your phone. You use AP mode to configure the Envoy's network settings — telling it which WiFi to connect to and providing the password. Activate it by pressing and holding the AP button for about one second. The AP network name is ENVOY_ followed by the serial number.
Yes — the Envoy has an ethernet port and will automatically prioritise a wired connection over WiFi. Ethernet is more reliable and eliminates monitoring gaps caused by signal dropouts. Connect an ethernet cable from the Envoy to a spare LAN port on your router. If the Envoy is too far away, use a powerline ethernet adapter to bridge the distance over your home's electrical wiring. These cost around £30–40 and provide a permanent, reliable connection.
Repeated disconnections are usually caused by weak WiFi signal at the Envoy location. The Envoy is often installed in a garage, loft, or utility cupboard where the signal is marginal. Other causes include router firmware updates that change settings, interference from neighbouring networks, or the router dropping idle devices. Switching to ethernet permanently resolves WiFi reliability issues.
Enlighten typically shows new data within 15 to 30 minutes of the Envoy reconnecting. If the Envoy was offline for less than seven days, it also backfills missing production data from its local buffer — this can take a few hours for a full week. Data beyond seven days is permanently lost. If Enlighten still shows nothing after 30 minutes, check the Envoy network LED is solid green.
Book
Cannot get the Envoy to reconnect? We set it up on site.
If it still won't connect, we set it up on site, from £195: we connect it to your WiFi, set up your router, including a separate 2.4 GHz network if it needs one, and check it's reporting. If the signal doesn't reach, a WiFi extender is an extra £75, and we carry them with us.
- Not affiliated with Enphase Energy
- On-site WiFi setup, from £195
- Enlighten account recovery available
Service notice
We’re busier than ever. Thank you for your patience.
Due to unprecedented demand we’re currently only carrying out on-site work in Yorkshire, and replies are taking up to 7 days. Remote diagnostics continue for the whole UK as normal.
Every message is read and answered, so please don’t send it twice; that only slows the queue.
Ronald Director, Solar Tech Support
On-site: Yorkshire only, for now
Remote: UK-wide, as usual
Remote fix: £125 if we fix it, no charge if we don’t
Replies: within 7 days
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