Solis WiFi Datalogger Setup — Reconnect SolisCloud After a Router Change
SolisCloud showing no data after a broadband switch or router change? The WiFi datalogger has lost its connection and needs reconfiguring. Your inverter is still generating — only the monitoring link is broken. This guide walks you through the reconnection process.
Datalogger LED flashing, SOLARMAN app not finding the logger, or SolisCloud still dark after setup? We walk you through it in a remote session.
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Before you start: Solis dataloggers only work on 2.4GHz WiFi. If your router only broadcasts 5GHz, or uses a combined network that doesn't allow 2.4GHz fallback, the logger will not connect regardless of how many times you reconfigure it. Check your router settings first.
5-step WiFi datalogger reconnection
This covers the most common scenario: SolisCloud has gone offline after a router change, broadband switch, or WiFi password update. The datalogger needs your new WiFi credentials.
Check the datalogger LED status
Find the WiFi datalogger — it is a small module plugged into the bottom or side of your Solis inverter. Check the LED indicator:
If the LED is solid green but SolisCloud shows no data, check your SolisCloud account login and plant configuration before reconfiguring the logger.
Confirm your router broadcasts 2.4GHz WiFi
Solis dataloggers only support 2.4GHz. This is the single most common reason WiFi setup fails. Check your router:
Download the SolisCloud app
The SolisCloud app (available on iOS and Android) is used to configure Solis WiFi dataloggers. During setup, your phone connects directly to the logger's own WiFi network, then transfers your home WiFi credentials to it.
The SolisCloud app covers S2-WL-ST, S3-WiFi-ST, S4-WiFi-ST, and S5-WiFi-ST datalogger models. Some older installations may use the SOLARMAN Smart app instead — try that as a fallback if SolisCloud doesn't find your logger.
Configure the datalogger with your WiFi credentials
In the SolisCloud app:
If the logger's WiFi network does not appear, press and hold the reset button on the logger for 10 seconds to put it back into configuration mode. After reset, the LED will flash rapidly, then the logger will broadcast its WiFi network again.
Verify the connection in SolisCloud
After the logger restarts, wait 5 to 10 minutes for it to connect and begin uploading data. Then check:
Why Solis monitoring goes offline — and why it matters
Solis inverters use a plug-in WiFi datalogger to send generation and performance data to SolisCloud (formerly the Ginlong Monitoring Portal). The logger stores your WiFi credentials and maintains a persistent connection to your router. When you change your broadband provider, get a new router, or update your WiFi password, the stored credentials no longer match and the logger drops offline. This is the single most common cause of SolisCloud monitoring going dark.
While the logger is offline, the inverter continues generating normally — you do not lose any solar production. What you lose is visibility: you cannot see how much you are generating, whether the system is performing correctly, or if any faults have occurred. For homeowners on the Smart Export Guarantee (SEG), monitoring data can also be useful for tracking export payments and verifying system health over time.
If the reconfiguration steps above do not resolve the issue, the datalogger itself may have failed. Solis dataloggers are replaceable modules — STS can confirm whether a replacement is needed based on the LED behaviour and SolisCloud account status. Replacement loggers are available directly from Solis distributors in the UK.
Solis WiFi setup — common questions
The logger stores your WiFi name and password internally. When you change your router or update the password, the stored credentials no longer match. The logger must be reconfigured with the new WiFi details using the SOLARMAN Smart app. Your inverter continues generating normally while the logger is disconnected — only the monitoring data stream is interrupted.
No. Solis WiFi dataloggers only support 2.4GHz. If your router uses a combined network with the same name for both bands, the logger may fail to connect. Create a separate 2.4GHz network with a distinct name, or check your router settings allow 2.4GHz connections on the combined network. Mesh systems may need band steering disabled.
The logger has three LEDs: PWR, NET, and COM. The NET LED tells you the WiFi status — solid green means connected, flashing green means powered but not connected (needs reconfiguring). PWR should be solid when the logger has power from the inverter. COM flashes when the logger is communicating with the inverter. If PWR is off, check the physical connection to the inverter port — try removing and reinserting the logger.
Press and hold the small reset button on the logger body for 5 to 10 seconds. The LED will flash rapidly then go off, indicating a factory reset. After reset, the logger broadcasts its own WiFi network for reconfiguration via the SOLARMAN Smart app. If your logger has no reset button, remove it from the inverter port, wait 30 seconds, and reinsert it.
We can guide you through the setup process remotely in a supported session, but someone needs to be physically near the inverter to connect a phone to the logger's broadcast network during configuration. If the logger hardware has failed, we diagnose that remotely and advise on replacement. Book a remote session and we'll walk you through it.
Solis WiFi setup not working?
Datalogger LED still flashing, SOLARMAN app not finding the logger, or SolisCloud still showing no data? We diagnose the issue remotely and walk you through the fix — or confirm if the logger needs replacing.