How to Use the Huawei FusionSolar App for Daily Solar Monitoring

What Is FusionSolar?

Huawei FusionSolar is the official monitoring platform for Huawei SUN2000 inverters — a popular choice in Sunollo solar systems. The app is available on iOS and Android and gives you real-time and historical data about your system's energy production, consumption, and health.

Getting Started

Download Huawei FusionSolar from the App Store or Google Play.
Tap Register and create an account with your email address.
Log in and tap the + icon to add a plant. Enter your Plant ID (provided on your Sunollo handover sheet) or ask your installer to share access.
If your installer registered the plant, ask them to add you as a secondary user so you have view access without needing the installer credentials.

Your Daily Monitoring Routine

Once your plant is linked, here is what to check each day — it takes under two minutes:

Check Today's Energy (kWh) — visible on the home screen. Should be accumulating from sunrise onwards.
Look at the Power Flow animation — arrows show energy moving from panels → home and/or grid. Arrows that stop moving usually indicate a fault or grid event.
Open Plant Details → Device Status — each inverter (and battery, if installed) should show Running. A yellow triangle or red cross means a fault.
Compare this week vs last week — use the Report tab to compare weekly yield. Weather-adjusted differences of more than 25% warrant a check.

Key Screens in FusionSolar

Understanding Alarm Codes

FusionSolar assigns a severity level to alarms:

Critical (Red) — System has stopped generating. Immediate attention required. Common examples: Grid-connected inverter shutdown, DC bus voltage abnormal.
Major (Orange) — System is generating at reduced capacity. Examples: String voltage low, fan failure.
Minor (Yellow) — Advisory alerts. Examples: Communication timeout, meter reading mismatch.

For any Critical or persistent Major alarm, contact Sunollo with a screenshot of the Alarm screen and the inverter serial number.

Using the Battery Screen (if installed)

If your system includes a Huawei LUNA battery, the home screen shows a battery charge indicator. Key things to monitor:

State of Charge (SoC) — should be charging during the day and discharging in the evening.
Battery Status — should show Charging or Discharging. If it shows Idle all day on a sunny day, check your working mode settings.
Go to More → Working Mode and confirm it is set to Maximise Self-Consumption unless you have a different preference.

Enabling Notifications

Go to Me → Settings → Alarm Notification. Turn on push notifications for Critical and Major alarms. You can also set up email notifications so you receive alerts even when your phone is off.

When to Call Sunollo

Any Critical alarm that does not clear after turning the inverter off and on (AC switch, then DC switch — wait 5 minutes, then turn DC on, then AC on).
Today's yield is zero by mid-morning on a clear day.
Battery is not charging or discharging at all for several consecutive days.
Inverter is running but net export shows zero while production is positive — this could indicate a meter or SP Services issue.