Huawei FusionSolar provides extensive performance and energy data for photovoltaic systems and battery storage solutions. Terms such as yield, consumption, or feed-in may seem self-explanatory but are often misinterpreted in practice. This article explains the most important FusionSolar data clearly, objectively, and without unnecessary technical complexity.
A broader overview of the complete monitoring system is provided in the article Huawei FusionSolar Monitoring: Functions, Login & Data Overview.
Overview: What Data Does Huawei FusionSolar Display?
Depending on system configuration, inverter type, and installed metering hardware, FusionSolar may display the following data:
- PV yield
- Current power output
- Self-consumption
- Grid import
- Feed-in
- Battery state of charge
- Battery charging and discharging power
Not every system automatically displays all values. The scope and level of detail depend on installed meters and system components.
Yield in Huawei FusionSolar: What Is Measured?
Yield describes the electrical energy generated by the photovoltaic system. FusionSolar typically displays this data as:
- Daily yield
- Monthly yield
- Annual yield
- Total yield since commissioning
Yield is measured in kilowatt-hours (kWh) and refers exclusively to electricity produced by the PV modules, regardless of how that electricity is used.
Power vs. Yield: A Key Difference
A common misconception is confusing power with yield.
- Power (kW): Instantaneous electrical output at a specific moment
- Yield (kWh): Accumulated energy over a defined period
Power fluctuates constantly due to weather conditions and time of day. Yield is better suited for evaluating system performance over longer periods.
Understanding Consumption and Self-Consumption
Consumption refers to the electricity demand of the household or business. FusionSolar can only display this value if appropriate metering hardware is installed.
Self-consumption is the portion of self-generated PV electricity that is used directly or later consumed via the battery. It includes:
- direct consumption from the PV system
- indirect consumption from the battery storage
Electricity drawn from the public grid is not included.
Grid Import and Feed-In Explained
Grid Import
Grid import refers to electricity drawn from the public grid when:
- PV production is insufficient
- the battery is discharged or unavailable
This value is also displayed in kWh.
Feed-In
Feed-in is the portion of generated PV electricity that is not consumed on site and is exported to the public grid.
In simplified terms: PV yield = self-consumption + feed-in
(minor rounding and measurement deviations may occur)
Battery Data in Huawei FusionSolar
For systems equipped with Huawei LUNA2000 battery storage, FusionSolar displays additional key figures:
- State of charge: Percentage fill level of the battery
- Charging power: Energy flowing into the battery
- Discharging power: Energy flowing out of the battery
The battery is used to shift PV electricity over time, for example from midday to evening or nighttime hours.
Why Do Battery Values Change Constantly?
Battery values react dynamically to:
- current electricity consumption
- PV generation
- grid conditions
- internal system priorities
As a result, state of charge and power values may fluctuate significantly even under stable weather conditions. This behavior is system-related and not an indication of a fault.
Data Time Delay in FusionSolar
Values displayed in Huawei FusionSolar are updated with a time delay. This means:
- no guaranteed real-time data
- updates typically occur within minutes
- delays may increase during high system load
FusionSolar is designed for system monitoring and analysis, not for second-by-second measurement.
Common Misunderstandings About FusionSolar Data
- High yield does not automatically mean high self-consumption
- Low feed-in is not an indicator of poor system performance
- Differences between app and web portal values are usually due to visualization
- Daily values are only fully meaningful after the end of the day
Single snapshots should not be overinterpreted.
When Are FusionSolar Data Sufficient – and When Are They Not?
Sufficient for:
- single-system installations
- basic system monitoring
- consumption and battery overview
- private use
Limited for:
- multiple systems or locations
- long-term detailed analysis
- cross-manufacturer evaluation
- external reporting requirements
Frequently Asked Questions About Huawei FusionSolar Data (FAQ)
Why do yield and consumption not match?
Yield represents generated energy, while consumption reflects electricity usage. Part of the yield may be fed into the grid or stored in the battery, which is why the values differ.
Why does FusionSolar show different values than the utility meter?
FusionSolar uses internal measurements and calculations. Utility meters are legally calibrated and may differ methodologically or temporally.
Why don’t I see consumption data in FusionSolar?
Consumption is only displayed if appropriate meters are installed and correctly configured. Without metering hardware, FusionSolar cannot calculate this value.
Are FusionSolar data real-time?
No. Data is updated with a delay. Short-term deviations are normal and system-related.
Can FusionSolar data be exported?
Depending on system and region, selected data can be exported as CSV files. Options for automated or extensive analysis are limited.
