My monitoring has been offline for days — is my system still working?

Almost certainly yes — the system continues to generate and store as configured. However, extended monitoring downtime means you are not seeing any alert if a fault does develop. It is worth resolving the connectivity issue within a reasonable timeframe. If you cannot see any data at all and are concerned about system health, a remote diagnostic session can verify the system is operating correctly.

What should I do if the monitoring went offline after a router change?

A router change typically changes the WiFi network name and password. The inverter has your old credentials stored and will fail to connect to the new network. You need to run the WiFi setup process for your brand to give it the new network details. This is one of the most common causes of monitoring going offline.

Connectivity fault · All brands

Solar monitoring offline

Q: Does monitoring offline mean my solar system has stopped working?

No. Monitoring offline means the inverter or dongle cannot communicate with the cloud platform — it does not mean your solar panels have stopped generating or your battery has stopped working. The system continues to operate as configured. You just cannot see live or historical data until connectivity is restored.

Q: How do I tell if it's a WiFi fault or a hardware fault?

Check the dongle's indicator light. If it is flashing or showing amber, it has lost WiFi — that is a connectivity fault, not a hardware fault. If the light is green (connected) but monitoring is still offline, the issue is either on the cloud platform side, or the device is connected to WiFi but cannot reach the cloud server (firewall, DNS, or server-side fault). If there is no light at all, the dongle may have lost power or failed.

Q: Can a dongle fail and need replacing?

Yes. WiFi dongles can fail from power surges, lightning proximity events, or simply age. Signs of dongle hardware failure include: no indicator light despite power being present, the AP hotspot not appearing when expected, or complete failure to connect after a successful factory reset. Replacement dongles are usually available directly from the brand and are low-cost to fit.

Your monitoring portal is showing the device as offline, or you haven't seen live data for a while. This doesn't mean your solar system has stopped working — but it does mean something in the communication chain has broken.

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System still generating while offline
Four distinct causes
Most cases don't need an engineer

Worked through the steps and still offline?

Dongle hardware failures and firmware-related connectivity faults often need deeper diagnosis. A remote session can confirm the cause and tell you exactly what needs replacing or resetting.

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Massively massively recommended. We had a big battery array (49kW across three phases) put in four years ago. c £35k cost. It’s been a total nightmare for many reasons, not least 1. our installer being totally useless and unresponsive and 2. Givenergy, our battery supplier, going bust. Long story short it had never worked anywhere near properly despite countless hours on phones and emails; the best we’d achieved was one third of the batteries working. Rather than write it off, I asked a PM friend to try to source someone who could come on site and review and revive the system. He found Solar Tech Support and Ron. Ron assured us he was the man to get it going again. After so many years of pain, I was not convinced but, true to his word, five hours later it was up and running. Lovely chap, super knowledgeable with a support team to lean on who are also clearly super technical. I honestly didn’t think there was much chance of getting this array going ever again so was absolutely delighted when Ron and team pulled it off. Bravo!

Will Wynne · Jun 2026 Google

Eaton Edwards · Jul 2026 Google

Sree · May 2026

Dennis Koenen · Jul 2026 Google

Will Wynne · Jun 2026 Google

Your solar system is almost certainly still working. Monitoring offline is a communication fault, not a generation fault. Your panels and battery continue operating as configured — timed charge schedules are stored locally on the inverter and are not affected by loss of internet connectivity.

The four causes of monitoring going offline

Each has different symptoms and a different fix.

1. WiFi connectivity fault

The inverter or dongle has lost connection to your home WiFi. This is the most common cause. Triggered by router replacement, password change, weak signal, or a 5GHz network incompatibility.

Sign: Dongle indicator is flashing or amber. AP hotspot may be visible in your WiFi list.

2. Dongle or hardware failure

The WiFi dongle or internal wireless module has failed — from age, power surge, or hardware defect. Less common but requires hardware replacement.

Sign: No indicator light at all, AP hotspot never appears, no response after power cycling.

3. Firmware update regression

A firmware update cleared WiFi credentials, changed network settings, or introduced a bug that prevents cloud connectivity. Happened immediately after an update notification.

Sign: Monitoring went offline at the same time as a firmware update. Dongle now in AP mode.

4. Cloud platform outage

The monitoring platform's servers are down. Your system and dongle are working fine — the cloud side is unavailable. Nothing to fix locally; wait for the platform to recover.

Sign: Multiple users reporting the same issue. Brand status page or social media confirms outage.

How to diagnose which cause you have

Work through these in order — each step narrows down the cause.

Check for a platform outage first

Before investigating your own equipment, check whether the monitoring platform is having an outage. Search for your brand name plus "outage" or "not working" on Twitter/X or check their status page. If it is a platform outage, nothing local needs fixing — wait for the provider to restore service.

Confirm your broadband is working

Open a website on your phone connected to your home WiFi (not mobile data). If your broadband is down, your inverter cannot reach the cloud. Restore broadband first, then recheck monitoring status after 10–15 minutes.

Check the dongle indicator light

Look at the WiFi dongle or inverter's WiFi indicator. A steady green (or blue on some brands) light means connected to WiFi; a flashing or amber light means the WiFi connection has been lost; no light may indicate loss of power to the dongle.

If the light shows WiFi lost, follow the WiFi not connecting guide to reconnect it. The monitoring offline is a symptom — WiFi loss is the cause.

Power cycle the dongle

Unplug the WiFi dongle from the inverter, wait 30 seconds, reinsert it, and wait 3–5 minutes for it to reconnect. If integrated, turn the inverter off via its isolation switch, wait 60 seconds, then turn it back on. Many transient connectivity faults clear with a clean restart.

Check for a recent firmware update

Think back to when monitoring went offline. If it coincided with an update notification from the app or portal, the update may have cleared stored WiFi credentials. Check whether the dongle is now broadcasting an AP hotspot (visible in your phone's WiFi list). If it is, run the WiFi setup process again to re-enter your credentials.

Brand-specific monitoring offline guides

GivEnergy portal offline GivEnergy WiFi setup SolarEdge monitoring setup Growatt Sunsynk Huawei FusionSolar offline Fox Cloud offline Fronius Solarweb offline Tesla app / gateway offline Victron VRM portal offline SigEnergy SigenCloud offline

How solar monitoring works (full guide)

FAQ

Frequently asked questions

Does monitoring offline mean my solar system has stopped working?

No. Monitoring offline means the device cannot communicate with the cloud platform — not that your system has stopped generating or storing. Panels and battery continue operating as configured. You just cannot see data until connectivity is restored.

How do I tell if it's a WiFi fault or a hardware fault?

Check the dongle indicator light. Flashing or amber means WiFi lost — that is a connectivity fault. Steady green but still offline suggests a cloud-side issue or firewall problem. No light at all despite the dongle being plugged in suggests a hardware failure or power issue to the dongle.

My monitoring went offline after a router change — what do I do?

Run the WiFi setup process for your brand to give the inverter your new network credentials. The device has the old password stored and cannot connect to the changed network. See the brand-specific WiFi setup guides linked above.

Can a dongle fail and need replacing?

Yes — dongle hardware can fail from power surges, age, or lightning proximity. Signs include no indicator light, the AP hotspot never appearing, or complete failure after a power cycle and factory reset. Replacement dongles are usually available from the manufacturer and are generally inexpensive and straightforward to replace.

How long can monitoring be offline before it becomes a problem?

Technically the system will run indefinitely without monitoring — it doesn't need the cloud connection to operate. However, without monitoring you won't see alerts if a fault develops, and you lose visibility over performance and battery state. We'd recommend resolving extended outages within a few days where possible.

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