Mass adoption of ultra-efficient Carnot gensets would reduce operating costs by ~£520M and save ~£480M in carbon taxes per year for the UK Continental Shelf. Carnot gensets will also be more reliable, not requiring cooling or oil systems which are the two most common points of failure in modern engines. Additionally, our gensets will consist of 300kW modules, ensuring continuity of operation if a single module fails. This guaranteed continuity of operation will reduce unplanned downtime and improve operating margins. When running on renewable hydrogen our gensets will enable zero-carbon operation of the UK continental shelf and a clean way to stabilise offshore renewable energy grids. In addition, our gensets will be used for long-term, bulk energy storage, converting surplus renewable energy into hydrogen for storage.