This thesis details the design, construction, and testing of a test rig for the Halmstad University solar car. In the current era, there is an increasing demand for sustainable modes of transportation. Solar cars represent a significant potential for sustainable transportation. The participating universities aim to construct their solar vehicle and determine which institution has built the most effective one through participation in the Bridgestone World Solar Challenge. Since operating a solar car on public roads is not permitted in all countries, test rigs can be utilized for indoor testing. This thesis will comprehensively explain the process of creating a test rig and a detailed analysis of the most suitable components and materials for its construction. Firstly, the sequence of steps followed to develop the frame will be explicated in the method section. Several literature reviews will be conducted in the theoretical section of the thesis. These will cover the following topics: existing design methods, finite element analysis, bearings, braking systems, and welding techniques. These studies should provide insight into the current landscape of the various subjects. They should enhance understanding of the genesis of choices of particular components/techniques for the frame development. After this, a discussion of the results will be conducted. The final test rig was designed following a series of iteration processes following the generative cycle delineated in the method. The design incorporates several key components, which are described here. The frame comprises steel box sections, consisting of a readily weldable material capable of withstanding the forces exerted upon it. The utilisation of gas welding in the assembly process is predicated on the economic efficiency of this technique. The front wheels of the solar car will be fastened with tensioning straps in the designated spaces, while the driven rear wheel will ride on two rollers mounted along both sides in a bearing with a bearing housing. Roller bearings are selected for their ability to withstand high speeds and forces. The rollers are composed of aluminium, a material chosen for its low weight and inertia. The simulation of road resistance is realized by using eddy current brakes, which function on the principle of a counteracting magnetic field. The operation of these brakes is non-contact, a factor that confers a significant advantage in terms of wear. Last, a critical review will be outlined regarding this thesis's collaboration, sustainability, social, economic, and environmental aspects.