There's no citation for that, so it could be what WP calls "original research". It is, however, pretty likely the right OOM. That would put the storage capacit

There's no citation for that, so it could be what WP calls "original research". It is, however, pretty likely the right OOM. That would put the storage capacity at around 1000x, and, if the estimates of the cranes' generating capacity elsewhere in the thread are correct, approximately proportional to that, as well.