A review of field performance of EVA-based encapsulants

摘要: As part of a past PVMaT contract (ZAG-3-11219-02-105661), several encapsulant formulations, developed for enhanced photothermal stability, were fielded at the STAR facility (Arizona) long-term testing and observation. In all, 36 modules (4 different module manufacturers) have been evaluated. At annual evaluation point, had exposed in field 4.5 years. Visual inspection I-V measurements made each module. Upon inspection, all formulations designed to eliminate discoloring mechanism appeared be clear. The relative short-circuit current (I/sub sc/) was measured For types, it found that dependence Isc with exposure time same particular type, regardless exclusive formulation.