What are the key performance indicators for photovoltaic systems?

The mass deployment of photovoltaic (PV) systems requires efficient and cost-effective operation and maintenance (O&M) approaches worldwide. This includes the reliable assessment of certain key performance indicators (KPI) such as the energy yield, performance ratio (PR), performance index (PI), availability and performance loss rate (PLR).

What is PV performance index (PI)?

Performance index (PI) is a metric that describes the ratio between the measured energy of a PV system and the predicted energy using a power predictive model. They are usually build for certain time periods, ranging from days to years, based on the relationship between weather data and PV system output.

Why do we need a performance guarantee for a large photovoltaic system?

Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes.

What is a PV system performance baseline & model validation?

After Initial Commissioning and a full year of system performance evaluation, PV system performance baseline and model validation will allow the system owner and maintenance providers to effectively evaluate system performance, at any time, for the life of the system. Commissioning for PV Performance Best Practice Guide 23

How do you document a photovoltaic system?

Example Table Documenting the Meteorological Input Parameters to the The power generation of a photovoltaic (PV) system may be documented by a capacity test [1, 2] that quantifies the power output of the system at set conditions, such as an irradiance of 1000 W/m2, an ambient temperature of 20°C, and a wind speed of 1 m/s.

What is a high potential for APV applications?

E. g. a high potential is expected for APV applications onfruits, berries, hops, and wine. With this PVPS Task 13 report, a broad range of methods and protocols for the performance characterization and performance assessment of new PV system components up to complex new systems with PV is introduced.