Measuring Degradation Rates Without Irradiance Data
A method to report PV system degradation rates without using irradiance data is demonstrated. First, a set of relative degradation rates are determined by comparing daily AC final yields from a group of PV systems relative to the average final yield of all the PV systems. Then, the difference between relative and absolute degradation rates is found from a statistical analysis. This approach is verified by comparing to methods that utilize irradiance data. This approach is significant because PV systems are often deployed without irradiance sensors, so the analysis method described here may enable measurements of degradation using data that were previously thought to be unsuitable for degradation studies.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1007339
- Report Number(s):
- NREL/CP-5200-47597; TRN: US201106%%222
- Resource Relation:
- Conference: 35th IEEE Photovoltaic Specialists Conference (PVSC '10), 20-25 June 2010, Honolulu, Hawaii
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nonlinear Photovoltaic Degradation Rates: Modeling and Comparison Against Conventional Methods
Comparative Analysis of Change-Point Techniques for Nonlinear Photovoltaic Performance Degradation Rate Estimations