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Farmerbob1 2 points ago +2 / -0

As a professional truck driver, I am not swallowing those fuel usage numbers.

The engine of a tractor trailer truck is roughly the same size as that diesel generator, and most of them use less fuel. My truck gets about 6.5 MPG at 70 miles per hour when it weighs 80,000 lbs. The engine in my truck is a 2016 DD15 engine, 12.7L inline 6.

Now, that generator appears to be a two-station charger. Perhaps the fuel usage numbers are accurate if TWO charging vehicles are attached. That would make the effective fuel economy about 11.2 MPG, which is much more in the realm of possibility for modern diesel generators - but I'd still say it seems low.

All that said, diesel charging stations are not meant to be efficient, they are meant to be places outside major electrical supply networks where electric vehicles can be recharged.