The TS4-R is a Retrofit or Add-on universal base. The TS4-R addresses the need for a retrofit solution that can be mounted on any existing installed PV system, connected into the existing PV module JBox, improving energy harvesting, greater flexibility, and increased control over project to the existing PV system. The offering for the retrofit is a two-piece solution: the TS4-R base, which is added on the solar module, and its covers, plug-and-play Flex MLPE which can be swapped in and out. It supports any of the wide offering of the existing TS4 Platform functional covers. It can also be designed into a new system, underperforming PV systems or adding smart features to new installations