>2-10 times the total energy the battery will store - presumably they mean over its lifetime Their number is the reciprocal of this. i.e. the total energy sto

>2-10 times the total energy the battery will store - presumably they mean over its lifetime Their number is the reciprocal of this. i.e. the total energy stored/discharged by the battery over it's lifetime = 2-10x the energy required to manufacture the battery. Which still seems a bit conservative. The corresponding number they quote for their storage system is 240.