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.
The idea that America has lots of racism but few actual racists is not a new one. Philip Dray titled his seminal history of lynching At the Hands of Persons Unknown because most investigations of lynchings in the South turned up no actual lynchers.