Mammoet is developing a new type of system for the transportation of offshore power cables. With this system the cables can be spooled, stored, and transported both on land and on heavy transport vessels in a more efficient way. There are a few uncertainties for the system, mainly about the loads on the carousel and the behavior of the cable stack. These uncertainties resulted in some assumptions that have been used for the proposed design. Furthermore, there are a few challenges for the system that need to be addressed to compete with the current offshore power cable transportation methods. The main challenges include the structural strength and stability in combination with the self-weight, the used cylinder stroke of the hydraulic SPMT cylinders and other issues with the SPMTs. In this study these uncertainties and the challenges for the current design of the system are investigated, which resulted in more insight in the uncertainties and a new concept with improved performance against the challenges.