Lightweight photovoltaic (PV) modules are the key technology to access new markets such as industrial buildings and mobile applications. In this work we investigate methods to reduce the weight of a module while still being able to withstand mechanical loads according to IEC 61215. Finite element modelling (FEM) shows that increasing stiffness of the backsheet has more impact on the stress of the solar cells and displacement of the module under mechanical load than increasing the encapsulants stiffness. Therefore, two approaches are evaluated to increase the Young’s modulus and hence stiffness: Firstly, laminating glass fiber layer onto the rear side of a module and secondly laminating honeycomb structures into the module. The results show that an increase in Young’s modulus by glass fiber layers or honeycomb structures are sufficient to provide a significant rigidity to show a similar displacement during mechanical load tests as conventional module setups. Therefore, embedded glass fibers or honeycomb structures in the backsheet can be used to achieve lightweight modules with thinner or even without front glass. Additionally, backsheets with embedded glass fibers may be a viable option for modules with thinner front glass which currently require a rear glass.