elvis buys
New Member
I just registered here to make this very point, but I see you beat me to it.It will be interesting to find out if the gasoline engine will be able to charge the battery at a rate faster or equal to the rate of discharge when at maximum load, such as towing heavy trailers through mountainous highways at 70+ mph. I imagine the 500 mile range will be drastically reduced in those instances. With ICE vehicles I've owned, towing a heavy camper reduced the normal range by more than one half. And when the gasoline runs out of the Harvester engine tank, can it be refilled and allow immediate continuation of the trip?
I would just add that the Harvester genset would only have to provide the *average* power consumption during a trip, including trips that have segments of heavy uphill towing. *It won't have to provide the peak power demand as long as the battery pack isn't depleted.* This is assuming that the power management scheme has a mode that allows the genset to run *before* the battery is depleted. IOW, that it's not hobbled by stupid EPA rules like the BMW i3 EREV was.
Since no long trip is 7% uphill the whole way, an EREV has several advantages over ICE or pure BE vehicles. An EREV with nominal 150 mile EV range should have a large enough battery to recover (via regen on the downhill segments) most of the extra energy expended going uphill, unlike typical PHEV (due to their much smaller batteries) or ICE.
Yet the inevitable drastic range reduction while towing heavy won't force frequent, lengthy recharging stops (usually at a cost per kwHr so much higher than utility rates that cost per mile isn't much less than gas). And of course, even longer range should be easy enough to provide with an auxiliary fuel tank, at drastically lower cost and weight than adding battery capacity.
This scheme seems perfect for people who want to do traditional truck tasks.
Of course, the devil is in the details, which are still a couple years away. They could easily screw up the implementation. Let's hope they get it right.
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