An over-performance message appears when the solar system is generating more energy than our algorithms has expected.
An over-performance alert can be caused by either a solar system performing very well or a monitoring set-up error which leads to a false diagnosis.
Some common issues that will cause a false over-performance diagnosis are:
- Incorrect labelling of circuits
- Incorrect solar system details entered on the dashboard e.g.
1. Incorrect inverter or panel specifications
2. Incorrect number of panels, strings or sub-arrays
3. Incorrect array tilt or orientation
4. Incorrect system location
If all of the above details are correct then the over-performance alert is likely to be related to the actual performance of your system.
Possible causes of slight over-performance include:
- The location is far away from the nearest weather station.
- The reflected light from surroundings could be particularly good for the location.
- If the panels are free from dust and debris, the soiling level may not be as bad as we assume in our calculations. (typically not a major factor)
- New panels may produce at an upper power tolerance & thus can perform slightly better when new
- The wiring losses may be lower then normal depending of the size of the wiring.
Possible causes of large over-performance include:
- Solar tracking systems
- A combination of small over-performance factors
The easiest issues to check for are the above listed issues which cause a false over-performance diagnosis. In order to ensure that your over-performance is related to your solar system and not the monitoring set-up, 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.
Note: For accurate display of data, the Solar Analytics monitoring device must capture all solar that occurs on site.
- 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)
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-performance sandwiched between consistently normal 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.
If the above factors do not explain why your site is over-performing please contact the Solar Analytics support team on 1300 651 137.