All electric technology (AET) is a term used for subsea production controls and is used particularly in contrast to electro-hydraulic controls, or direct-hydraulic controls. AET more generally refers to the actuation of subsea valves using electrical motors. The operation of valves using electrical motors instead of hydraulic pressure has advantages and disadvantages. The advantages become more pronounced as field development and subsea equipment design evolves towards higher pressures, deeper waters and longer tie-back distances. And, of course, as the technology matures and the market grows, certain disadvantages of yesterday trend positively toward tomorrow. AET has been in operation for some time. One key reference is the Total-operated K5F field in the Dutch sector of the North Sea which has been in operation since 2008. Still despite the relatively long track record, industry-wide acceptance, and as a result the AET market growth, has been slow. This presentation will highlight the operational experience of K5F and the ongoing efforts within the industry to advance the technology and widen the market. As part of the ongoing efforts, the reliability studies that have been performed within the Deepstar program will be presented, focused on the use of batteries as a fail-safe means to function a subsea valve, versus the traditional use of springs.