The roadmap to a successful commercialisation ofwave energy inherently incorporates the concept of anarrayorfarmof Wave Energy Converters (WECs). These interactinghydrodynamic structures require an optimised process that canensure the maximum extraction of time-averaged energy fromocean waves, while respecting the physical limitations of eachdevice and actuator characteristics. Recently, a novel optimalcontrol framework based on the concept ofmoment, for asingle WEC device, has been introduced in [1]. Such a strategyoffers an energy-maximising computationally efficient solutionthat can systematically incorporate state and input constraints.This paper presents the mathematical extension of the optimalcontrol framework of [1] to the case where an array of WECsis considered, providing an efficient solution that exploits thehydrodynamic interaction between devices to maximise the totalabsorbed energy.