A PV system’s performance ratio (PR) is the ratio between actual production of a PV system and received solar irradiation on-site, and is used to evaluate system quality. A common way to measure received solar irradiation is to deploy environmental sensors at the PV site. The downside of using sensors to measure received solar irradiation is that sensors require installation, calibration, and maintenance, all at a cost to the system owner. Sensors have a short warranty period and need to be replaced over the course of a PV system’s lifetime.
- Eliminates sensor purchasing, installation, maintenance, cleaning, and replacement costs
- Prevents possible inaccurate measurements due to environmental factors and improper sensor installation
- Supports multiple tilts and orientations, no need to install multiple sensors on-site
- Offers daily and monthly PR calculations
- Seamlessly visualized on the dashboard of the SolarEdge monitoring platform
- Provides up to 12 months of historical PR data from day of adding the service
|PR data reporting||Daily, based on multiple samplings|
|Accuracy1||Comparable to irradiance sensors|
|Area coverage2||North America, EU, APAC, Australia, & Southern Africa|
|Normal PR values3||0.6 to 0.9 for new systems|
|Cost per PV site4||Commercial — $99/year|
Note: The service requires a published physical layout. For more information on how to configure the site's physical layout refer to: Application Note – Site Administration in the Monitoring Portal
Service Coverage Map:
Monitoring Satellite-Based PR:
Example of a normally functioning PV site as seen on the SolarEdge monitoring platform.
Example of a site with low PR indicating a problem as seen on the SolarEdge monitoring platform.