Document Type

Conference Proceeding

Publication Date

2-2011

Publisher

National Renewable Energy Laboratory

First page number:

1

Last page number:

9

Abstract

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.

Keywords

Materials — Deterioration; Photovoltaic cells – Deterioration; Solar energy

Disciplines

Materials Science and Engineering | Oil, Gas, and Energy | Sustainability

Language

English

Comments

Presented at the 35th IEEE Photovoltaic Specialists Conference (PVSC '10): Honolulu, Hawaii: 20-25 June 2010.

NREL Report No. CP-5200-47597


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