Sure. But it can be generated on refinery sites, using solids and extremely nonvolatile fractions as fuel. I suspect that using outside electricity is a purely

Sure. But it can be generated on refinery sites, using solids and extremely nonvolatile fractions as fuel. I suspect that using outside electricity is a purely economic issue. That is, when the value of additional products produced is greater than the cost of extra electricity needed. So in that sense, oil refineries are like aluminum refineries, in that they can store surplus electricity.