This article explains where irradiance data is used, how the Performance Ratio (PR) of your PV site is calculated and how to add an irradiance sensor.
| Description | Calculation |
| Performance Ratio is used as a measure of the quality of a solar plant, independent of weather conditions. |
The Performance Ratio can only be calculated if irradiance data is available. PR = AC yield / (Installed capacity / 1000 * Reference irradiance) Reference irradiance = the daily average irradiance of the reference sensor |
How to add a sensor
- Log in with your Solytic account.
- Select the site you want to add the reference sensor to.
- Navigate to Site > Configuration > Overview
- Click the last option in the second column to open the menu and select the reference sensor you'd like to use
- Confirm your selection by clicking the "Update" button in the bottom right corner
If you select a satellite device as reference sensor, it can happen that a PR of more than 100% is displayed. This is because the daily average of the satellite data is used for the calculation. In this case, there may be stronger inaccuracies compared to a locally installed sensor. A PR of more than 100% can also occur if a locally installed sensor is not calibrated or only provides inaccurate measurements.
Where is this used?
| Portfolio Dashboard |
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| Technical site dashboard |
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Site > Devices > Sensors |
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