On 8/23/21 6:09 AM, EVDL Administrator via EV wrote:
Mark, I'd still like to read YOUR responses to the questions posted here,
especially to my own questions.
Ditto. Though I have posted no specific questions. But the primary
question seems to remain unanswered: "Why might a car buyer select a
FCEV over a BEV?"
That said, thanks for posting that video clip.
But that's just technical griping. To get to the info, the presenter made a
point that I hadn't thought much about - increasing range on an FCEV is less
likely to add significant weight than it would on a BEV.
She seems to think that that matters more for trucks than cars. I'd say
that the opposite is true. When you consider battery weight as a percentage
of a truck's payload, more might not be that big a deal.
Thanks for the interpretation of the video. I am generally not willing
to expend expensive bandwidth to view videos.
She points out that FCEVs fuel faster. She says 5 minutes for FCEVs;
elsewhere I've read 8 minutes. However, as superchargers hit 300kW, the
difference is narrowing.
An anecdote: I recently charged at one of the new 250kw SuperChargers
and was impressed. Though I did not measure total charge time, I did
notice that it started at about 240kw and by the time it had tapered to
200kw, I had added more than 100 miles of range. I needed more than
that 100 miles so spent a total of approximately 20 minutes charging.
In our area, 150kw chargers are far more common where 30 minute charge
times are typical. 150kw chargers typically peak at 140-145kw and
quickly taper. I do not see real significance in the difference. When
on the road, I spend almost no time waiting for a charge. Getting
coffee and taking head breaks uses most of the charge time. We've
mentioned it MANY times but most, by far, charging takes NO time since
it is done at night at homes.
Tesla is behind in charging times since all Tesla batteries are ~400
volts and can not take advantage of 800 volt chargers. Though I have
never actually seen a 800 volt charger. Quick charging is mostly a
concern of those who do no yet have Teslas.
In pondering what attraction a FCEV might have over a BEV, I hit upon an
extremely minor one. BEVs do not shed mass as they are driven, while
FCEVs do. So, FCEVs should see a very slight rise in efficiency as they
expend their fuel while BEVs do not. I am NOT claiming that it should
be a consideration when making buying decisions. But, since we are
grasping for straws, it is SOMETHING.
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