Sun harvester
Firstly confirm with the factory if it’s glass.What type, laminated or toughen glass. Or acrylic.
From my previous working life it looks like a crack in what is known as laminated glass.
The crazing around the edges also looks like a contamination of the sealant to the inter layer of the laminated glass. This is only if it’s glass.
If it’s acrylic then it’s most likely a stress crack and the crazing is the adhesive seal and starting to fail, UV.
Bavaria seem to use urethane based sealants which in my opinion are second rate to silicone sealants when it come to sealing glass.
Let me know what Bavaria say.
Cheers
Club56
Vision 42 2013
