This is brilliant. Waited a long time for this. It is the obvious answer. Self contained units of half a megawatt hour each, costing about $1 per watt hour to build and able to sell electricity at 6 cents a kilowatt hour. Fuel costs are only half a cent per kilowatt hour which competes favourably with coal. Fusion still seems decades away so we need this in the meantime instead of those dreadful solar and wind solutions.