You got me there, I didn't read closely. Upon futher reading I still call BS on it. The amount of power the unit is claimed to provide (600A @ 48V = 29KW = 38HP) would work but the duration I would imagine is very short. The HP is not unimpressive but given the size of the gear they are showing, I doubt that could provide that power for any length of time.
Maybe that's all that's needed; that's where the bulk of hybrid-electric power savings comes from (starts/stops and regenerative braking).
I'll also modify my earlier comments in that you can't equate power drawn by an electric charger to power gains. If so then a mechanical supercharger drawing 20HP would not gain more than that which we know is not the case. It is however still difficult to achieve any kind of gains with an electric system efficiently as it takes a very powerful electric motor to compress the volume of air that an internal combustion engine needs to any appreciable pressure which DOES relate directly to gains.
If this system as described truly does work, even for tens of HP and regeneration, I'll be impressed. I'd question their implementation, though, as anyone who's done much with cars know that the belt drive they have will be difficult to make effective. I'm guessing belt slip is going to be a big issue.
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