Small Island Developing States such as the British Virgin Islands face a challenge to secure sufficient fresh water supplies due to a limited number of fresh water sources, which are under increasing pressure due to climate change. By harnessing the infinite supply of resources from the sea, sun and earth, Elemental Water Makers developed an off-grid, solar-powered desalination solution that offers a sustainable and affordable drinking water supply for a private property on the British Virgin Islands. Where water quality was previously unreliable and quantity was irregular due to power outages, the property now produces water using 100% renewable energy (gravity and solar power) and adopts energy recovery principles, making it completely self-reliant. This desalination solution has lead to a cost reduction of 63% and prevents production of 25 tons of CO2 per year, all while producing 12.5 m3 of high-quality drinking water per day, both during the day and night time. Moreover, marine pollution is minimized as brine water discharge is only slightly more salty (6%) than the surrounding sea water, thereby mitigating ecological damage.