Electrical isolation design and electrochemical corrosion in thin-film photovoltaic modules

The development of a proposed wet insulation-resistance qualification test specification for production-line modules is presented., Laboratory research directed toward understanding and eliminating problems associated with electrical isolation of thin-film photovoltaic module circuitry is presented. Test results serve to measure module field life as limited by electrochemical corrosion degradation mechanisms. Current module-level research covering encapsulant voltage withstanding capability is also described, and suggestions for improving module electrical isolation are offered.