A 2mm thickness solar glass panel is a critical component in photovoltaic systems, serving as a protective and performance-enhancing layer for solar cells. These. To add a bit of complexity in purchase choices for solar panel buyers, there can be a toss-up between single and double/dual glass panels. So, which is better? Back in November we looked at whether bifacial panels are worth it for residential installations. These panels harvest reflected light from. In terms of cost reduction, glass with side 2mm offers the highest potential in respect of reduced material versus increased effort and costs for handling and breakage. Ever wondered why solar panel manufacturers obsess over glass thickness? From durability to light transmission, the glass layer in. However, dual-glass modules have certain disadvantages that are important to take into consideration during the product design phase.