System WiFi reconnect directory
Your energy systems data has stopped updating in your monitoring app. Before anything else, know this: your system is almost certainly still generating power. The only thing that has dropped is the WiFi link between your inverter and the manufacturer’s cloud server. The panels are still working, your inverter is still feeding the premises, and your battery (if you have one) is still doing its job. What you have lost is visibility, not generation.
This page routes you to the right fix for your brand. Most reconnections take 5 to 15 minutes and require nothing more than a smartphone and your home WiFi password.Â
Not sure you actually need a WiFi reconnect?
WiFi reconnection is the right fix if:
- Your monitoring app shows the inverter as offline or not reporting, but the inverter's own display is on and (in daylight) showing power output
- You have recently changed your WiFi password, modem, internet provider, or router
- Your router had a power cut or restart in the last few days
- The WiFi indicator LED on the inverter is off or flashing rather than solid
WiFi reconnection IS NOT the right fix if:
- The inverter display is completely blank (check the solar supply main switch at your switchboard first)
- The inverter is showing a fault or error code (see the solar and battery operation guide for diagnostics)
- Your system has never shown data in the app since installation (this is usually a registration issue, contact PSW Life Support rather than reconfiguring WiFi)
Select your inverter brand
If you are not sure which brand you have, walk up to the inverter or battery and read the name on the front panel. It is the box mounted on the wall, most often in the garage, near the switchboard, or on an external wall.Â
| Brand | Guide |
|---|---|
Alpha ESS | |
Fronius | |
GoodWe | |
Growatt | |
Huawei | |
Sungrow | |
SolarEdge | |
SMA | |
SAJ | |
Sigenergy | |
What every guide covers
Brand specific walk throughs
- What you need: the right app, your WiFi password, and physical access to the inverter
- Before you start: quick diagnostic checks so you don't chase the wrong problem
- Primary reconnection method: the app-based procedure for that brand
- Fallback method: a browser-based or alternative approach if the app fails
- LED / display reference: what the lights on your inverter actually mean
- WiFi compatibility: the 2.4GHz vs 5GHz issue, Telstra Smart Modem quirks, and signal strength in garages
- When to contact PSW Life Support: clear escalation criteria so you are not left guessing
The universal WiFi issue
2.4GHz vs 5GHz
Almost every inverter WiFi problem we see in Perth comes back to the same root cause. Inverter WiFi modules connect to 2.4GHz networks only. They cannot see or join 5GHz networks. Most modern routers, including every Telstra Smart Modem Gen 2 and Gen 3, NBN-supplied Nokia and Sagemcom routers, and current Optus hardware, broadcast both bands under a single network name by default. To your phone, that is fine. To your inverter, it often looks like a network that keeps failing to authenticate.
The fix is one of:
Split your 2.4GHz and 5GHz bands into two separate network names (e.g., HomeWiFi and HomeWiFi-5G) in your router admin page
Temporarily disable the 5GHz band during inverter configuration, then re-enable it
Use a wired Ethernet connection where your inverter model supports it
If you work through the brand-specific guide and the reconnection still fails with a password error, this is almost always the reason.Â
Why WiFi matters
Beyond just seeing your data
A permanently offline inverter is not just a monitoring inconvenience. Several things depend on that data link:
- Extended warranty clauses. Most manufacturers, Fronius, SolarEdge, Sigenergy, Tesla, require an active internet connection for the full warranty period. Extended warranties can be voided if the system is offline for prolonged periods.
- Firmware updates. Inverters receive grid-compliance and safety updates remotely. An offline inverter does not get them.
- VPP participation. If your battery is enrolled in a Virtual Power Plant, the VPP cannot dispatch commands to an offline system. Some VPPs pay based on availability, and downtime costs you money.
- Early fault detection. PSW Life Support monitors fleet-wide performance data. A system sending data is a system we can help with proactively. A dark system is one you have to notice yourself.
Maintaining a healthy WiFi link is part of owning a modern solar or battery system. It is not a PSW-specific requirement; it is how every major manufacturer has designed these products.
Still stuck?
- If you have followed the guide for your inverter brand and the data has not returned within 24 hours, lodge a support request with PSW Life Support. Include:
- Your inverter brand and model
- The WiFi reconnect guide you followed
- What happened at each step you tried
- A photo of the inverter’s LED indicators or display, if possible
We will work through it with you.
