> then the additional cost to transport it would be less relevant I mean, if weight is the only issue, then maybe don't transport it ever? Its not like we try

> then the additional cost to transport it would be less relevant I mean, if weight is the only issue, then maybe don't transport it ever? Its not like we try to "transport" the Bath County Pumped hydro station around (aka: the largest battery in the USA). We just let it sit in one location and convert from electricity (usually nuclear at night) into energy-storage (pump water uphill), and then convert it back later (release the water during daytime peak-electricity usage). --------- If the energy "needs to be transported", then convert the energy into another form (Ethanol fuel? Syngas Kerosene? ). Each conversion loses efficiency of course, but if Iron is cheap enough to use as "energy storage", then it can be our "energy storage of last resort", since any storage is better than waste. (IE: Never turn off your solar panels. We always have "something" to dump our excess electricity into)