An inverter converts DC to AC, but what "power density" means is anyone's guess.
Maybe Mr. Airboatr will know.
Generally speaking inverters can't handle high current draw, of the type needed to operate an electric motor, because current in = current out; ( roughly speaking, you do get some losses) so I'm guessing they have found a way round it
Ttfn
Pete
An Elephant is a Mouse designed to
a government specification.