Battery storage power stations use rechargeable batteries for load-leveling (storing electric energy at times of low demand for use during peak periods) and for renewable energy uses (such as storing power generated from photovoltaic arrays during the day to be used at night).
Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
A draft horse (US), draught horse (UK and Commonwealth) or dray horse (from the Old English dragan meaning to draw or haul; compare Dutch dragen and German tragen meaning to carry and Danish drage meaning to draw or to fare), less often called a carthorse, work horse or heavy horse, is a large horse bred to be a working animal doing hard ...