IEC 61724:1998

1. Scope
2. Normative references
3. Measured parameters
4. Monitoring method
    4.1 Measurement of irradiance
    4.2 Measurement of ambient air temperature
    4.3 Measurement of wind speed
    4.4 Measurement of module temperature
    4.5 Measurement of voltage and current
    4.6 Measurement of electrical power
    4.7 Data acquisition system
    4.8 Sampling interval
    4.9 Data processing operation
    4.10 Recording interval, tr (expressed in hours)
    4.11 Monitoring period
5. Documentation
6. Data format
    6.1 Separate header with multiple data records
    6.2 Single record format
7. Check of data quality
8. Derived parameters
    8.1 Global irradiation
    8.2 Electrical energy quantities
    8.3 BOS component performance
    8.4 System performance indices
Annex A (informative) A suggested method of checking the
data acquisition system
Figure 1 - Parameters to be measured in real time
Table 1 - Parameters to be measured in real time
Table 2 - Derived parameters

Recommends procedures for the monitoring of energy-related photovoltaic (PV) system characteristics, and for the exchange and analysis of monitored data. The purpose is the assessment of the overall performance of PV systems.