Repair and preventive maintenance of photovoltaic modules with degrading backsheets using flowable silicone sealant

Photovoltaic (PV) modules with a degrading backsheet pose challenge for solar park operators and other players in the PV value chain. Some types of backsheets are known to develop cracks because an aging-induced change mechanical characteristics material during operation field, which result loss insulation resistance. In this work, we present solution repair preventive maintenance based on single component flowable silicone sealant. The method fills insulating material, restoring resistance, provides protective layer avoid subsequent degradation. was successfully implemented back co-extruded polyamide (‘AAA’), showed deep following degradation 5–7 years park. repaired had restored resistance several hundred MΩ as observed wet leakage testing maintained high after accelerating aging. This technology can be done field is alternative module replacement.