An Under-Performance message appears when the solar system is generating less energy than is expected. To understand what information our Algorithms use to estimate what solar production the site's system uses please visit our "How does it work" page.
Some common issues that will cause an Under-Performance are:
- Incorrect solar system details entered on the dashboard
- Incorrect labelling of circuits
- Incorrect device wiring
- Voltage throttling via the inverter settings (Volt-VAr / Volt-Watt response)
- Export limited sites
- Actual solar system fault
- Seasonal change (Autumn & Winter shading)
In order to troubleshoot this issue, please check the following information on the dashboard:
- Inverter/s. Check that the number of inverters and their ratings are correct;
- Subarray/s. Check that each subarrays rating, orientation and tilt is accurate. Each inverter must have its panel details inputted individually;
- Hardware configuration. Check the channel labelling (and enabling) in hardware configuration. This may need to be reconfigured by Solar Analytics.
- Check that the production readings on the Live Monitor (or Live Data) are reasonably close to the inverter rating (ie. on a sunny day at noon the production should be close to the inverter rating).
Live Data > Long Energy
- Polarity. Check that each channel has the correct polarity.
- Power factor. Check that each channel has a power factor greater than 0.5.
Other causes of performance issues to consider:
- Time. Our algorithm requires at least 24 hours of data to calculate an accurate performance value.
- Outliers. In the event that there is only one day of over- or underperformance sandwiched between consistently well-performing days the cause it most likely a discrepancy between the weather data received from The Bureau of Meteorology and the true weather conditions and can be disregarded.