Some WiFi faults need deeper diagnosis — particularly if the dongle hardware has failed or the inverter firmware has an issue. A remote session can confirm the cause.
Book your free remote diagnosticWhat's includedNote: WiFi issues don't stop your system generating. Your panels and battery are still working — you just can't see the data.
I work for a Solar Company and had a customer with a GivEnergy system that we are not versed in. Ron took the time to explain the issues my customer was having and between us managed to rectify the issues. 10 Stars ... Thanks again STS
Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.
A really big thank you to Ron and his team, he has vast amounts of knowledge and got my system back up and running, also good to get on with. I was absolutely lost as to know what to do, no help from installer and somehow came across Ron and am I glad I did. I would definitely definitely recommend him to anyone who has faults with there solar system, any make I would say. Thanks again Ron a pleasure meeting you.
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I’ve used Ron a couple of times regarding issues with my Givenergy inverter and batteries after Givenergy went bust. My system stopped working properly so it was a stressful time but Ron resolved the issues and got my system working properly again. He’s really helpful and knowledgeable and I wouldn’t hesitate to recommend him and to use him again if the need arose.
Check these first before going further.
Solar inverters only support 2.4GHz. If your router uses a combined band or 5GHz-only network, the inverter won't connect or will drop repeatedly.
The inverter has your old credentials stored. After any router change you must run the WiFi setup process again with the new details.
If the inverter is in a utility room, garage, or outbuilding, the signal may be too weak for a stable connection. A WiFi extender near the inverter often solves this.
The inverter or dongle is broadcasting its own hotspot, waiting to be configured. Check your phone's WiFi list for an SSID matching your inverter brand.
Work through these in order. Each step either resolves the issue or narrows down what's causing it.
Solar inverters use 2.4GHz WiFi only — they cannot connect to 5GHz. Many modern routers broadcast a combined network that merges both bands under one SSID. The inverter may connect briefly then drop as the router tries to move it to 5GHz.
Log into your router admin page and check the wireless settings. If there is no separate 2.4GHz SSID, create one — this is usually a setting called "band steering" or "smart connect" that you can disable to separate the bands.
Stand next to the inverter with your phone and check the WiFi signal meter for your 2.4GHz network. You need a strong signal — at least two or three bars, ideally more. Most inverters require RSSI of -70 dBm or better.
If the signal is weak, a WiFi extender or mesh node placed near the inverter is usually the quickest fix. A powerline ethernet adapter is more reliable and avoids WiFi altogether.
If your broadband provider changed, your router was replaced, or your WiFi password was updated, the inverter still has the old credentials. It will keep failing to connect but you won't see any obvious error — it just stays offline. You need to run the WiFi setup process again with the new network name and password.
When an inverter or dongle has no network to connect to, it broadcasts its own WiFi hotspot so you can configure it. Look at your phone's WiFi list for networks named with your inverter brand — for example "GivEnergy-A1B2C3", "Growatt-XXXXXX", or "SolarmanAP-XXXXXX".
If you see this, the device needs to be configured. Connect to the hotspot and follow the brand-specific setup process.
If steps 1–4 are resolved and the device still won't connect, run a fresh WiFi setup from scratch. Most brands require you to connect to the device's AP hotspot first, then use either the app or a web browser to enter your home network credentials. See the brand-specific guides below for exact steps.
If you have worked through all five steps and the device still won't connect, you are likely looking at one of these less-common causes:
The WiFi module inside the dongle or inverter has failed. This is more common after lightning events, power surges, or on older units. Replacement dongles are usually available and low-cost — but you need to confirm this is the cause first.
Some firmware updates have introduced WiFi connectivity regressions. If connectivity was lost immediately after a firmware update, the firmware may need to be rolled back or a patch applied — this requires remote access to the device configuration.
Some routers with strict MAC filtering, AP isolation, or client isolation settings will prevent the inverter from connecting or from reaching the internet after connecting. Check your router's security settings and ensure IoT/device isolation is not blocking the inverter's MAC address.
Your system is still generating. A WiFi connectivity fault only affects monitoring — it does not stop your solar panels generating or your battery operating. The system will continue to work as configured; you just won't be able to see live data until connectivity is restored.
For step-by-step instructions to reconnect your specific brand.
A remote session talks you through the reconnection process for your specific dongle and inverter model, and confirms whether the issue is network-side or whether the dongle itself needs replacing.
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