[IamIan]

Originally Posted by P-hack

For example, here is a page about the t-zero range extender: ACP AC Propulsion Series Range Extending Trailer prototype. Toyota Rav4-EV Hybrid prototype. Alan Cocconi. 2000 BEV (Battery Electric Vehicle). RXT-G. LongRanger. Hybrid Trailer. EV Range Extender. GenSet. "Stock configuration 42 MPG cross country series hybrid drive"?!? 42MPG, Really? with a picture of an SUV there? The thing is like $75k!!! and behind a small 1500lb car it only got 30-35. I call bullsh*t, major bullsh*t on these guys.

Blue Bold added ... Why?

YMMV ... Without knowing many details about the conditions of how the 42MPG vs 30-35MPG was achieved ... the MPG numbers are next to meaningless.

Example:
I can tell you nothing of the conditions ... and still 100% correctly and honestly tell you that I got 90MPG on one one tank (~10Gal) and 55MPG in the same car on another tank (~9Gal) ... without knowing many of the details of the conditions ... the MPG numbers are next to meaningless.

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If you want to knock a Generator trailer for the tiny % of trips is it used ... and for only getting a low ~19% efficiency from tank to road ... that's fine ... but I would expect you to equally knock just as hard ... any straight ICE vehicle any time it gets the same ~19% or less efficiency from tank to road... or harder when it gets 0% efficiency idling ... or knock harder any stationary generator for home use that gets less use and operates less efficiently than ~22% from fuel to outlet.

As has been said ... under some conditions the pusher trailer can be more efficient ... but in others ... it will not be.

And the generator trailer as more auxiliary useful utility than a pusher trailer does... electrical power on a work site ... power during a black out ... etc.