PRELIMINARY ASSESSMENT OF DEGRADATION IN FIELD-AGED MULTI-CRYSTALLINE SILICON PV MODULES INSTALLED IN HOT-HUMID CLIMATE OF MID GHANA

摘要

A multicrystalline solar PV installation in Kumasi Ghana, a hot humid climate, was studied for degradation in key performance characteristics after 18-years of exposure. An outdoor current-voltage (I-V) characteristization of the ASE-50-PWX-D the various modules was undertaken. The data was then translated to Standard Test Conditions (STC) and compared with the primary performance characteristics of the modules. The results showed a 0.9% - 1.6% average annual decline in peak power. Short-circuit current and open circuit voltage declined annually by 0.3%-0.6% and 0.1%-0.2% respectively. Decline in the fill factor was 0.3% - 1.2% p.a. resulting from 0.7%-1.1% and 0% - 0.8% loss in current and voltage at peak power. The module had a 10-year warranty and this data shows that it has met and exceeded warranty requirements.