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.
Assay: An assay is an analysis done to determine: 1  The presence of a substance and the amount of that substance. 2  The biological or pharmacological potency of a drug.ssay is also used as a verb and has several related meanings in this role: 1  To try or attempt. 2  For example, she assayed this operation for the first time and so was understandably nervous.. 3  To analyze a mixture for one or more of its components. 4  To judge the value, the worth of something.