Turning OFF Costs. Why?

Not sure you want or need one Tera-watt hour 'fuel dump', but it does fit with the current scheme of centralized generation, because it might be vulnerable to attack, fires, or just good old single point failure. However if/as we move to a grid with far more  lower power generating sites, then a few thousand storage sites each with banks totalling half a gigawatt hour may be more sensible, or even at the street or domestic level, a few days supply for a house is perhaps half a megawatt hour. - back to that 36kg cylinder of hydrogen again (a touch under 1000 litres at 20C and 1atm, or more sensibly an oil drum size at racing bike tyre sort of pressures).

Mike.

Not sure you want or need one Tera-watt hour 'fuel dump', but it does fit with the current scheme of centralized generation, because it might be vulnerable to attack, fires, or just good old single point failure. However if/as we move to a grid with far more  lower power generating sites, then a few thousand storage sites each with banks totalling half a gigawatt hour may be more sensible, or even at the street or domestic level, a few days supply for a house is perhaps half a megawatt hour. - back to that 36kg cylinder of hydrogen again (a touch under 1000 litres at 20C and 1atm, or more sensibly an oil drum size at racing bike tyre sort of pressures).

Mike.