Abstract: Conventional photovoltaic cables are designed based on the requirements for use on land, while floating photovoltaic (PV) cables need to be laid in complex and harsh water environment, and the general land photovoltaic cables are not applicable. To meet the operational demands of floating PV systems, a DC 1.5 kV 1×16 mm² cable was taken as an example. Through structural design, material selection, and process control, the cable was developed and its relevant performance was experimentally verified. Results indicated that the developed cable for floating PV systems satisfied the requirements for waterproofing, anti-rodent and anti-termite protection, drag resistance, and fungal resistance, which could serve as a reference for design and application of cables in other floating photovoltaic projects.