KEMA, in partnership with civil engineering firm Bureau Lievense and technology illustrators Rudolph and Robert Das, has developed an “Energy Island” concept to store power generated from an offshore wind farm. The innovative concept design is the initial result of an on-going feasibility study being conducted for Dutch energy companies. The Energy Island designed by KEMA, Lievense and the Das brothers incorporates a new concept in pumped hydro storage – an inverse offshore pump accumulation station (IOPAC). On the Energy Island when there is a surplus of wind energy, the excess energy is used to pump sea water out of the interior ‘subsurface-lake’ into the surrounding sea.