I tend to agree: L2 is on the way out for public locations. The two
mainstains are home and work. Though work locations could be supported
primarily by 20A 110v, I suppose.
The other consideration is whether 50kW is enough for L3. I say no,
we'll need 300kW or higher.
If people are driving long distance, many will want to drive 3-4 hours
without a stop. At, say 250Wh/mile (steady freeway driving), that would
be 75kWh to 100kWh. (Yes, I know we aren't there yet, but consumers
rule and I think this is where we are going.) Anyway, for a 15 minute
charge, that requires a 300-400kW service per ESVE.
You can say all you want (and you're right) about it being wasteful to
carry a large battery around for use on the occasional trip. Also that
people can wait more than 15 minutes for a charge. Or that people can
plan their stops better. All true. Won't happen for the mass consumer.
Peri
------ Original Message ------
From: "tomw via EV" <[email protected]>
To: [email protected]
Sent: 10-Dec-15 7:10:09 AM
Subject: Re: [EVDL] Why all EVgo's L3 EVSE eggs in one basket? ... (a
paradigm shift of charging 200+mi EVs)
Here's my 2 cents Bruce. I expect that over the next 10 years many L2
EVSEs
will become stranded assets. Nissan and GM plan to introduce 150 to
200
mile range cars in 2017, and Tesla likely will follow soon after. As
the
mix of evs gradually moves to mostly 200 range vehicles L2 EVSEs will
be
used less and less since there will be no need for people to charge
anywhere
but at home for in-town driving, and few will want to wait 4-5 hours to
recharge a 60kWh pack at a 7kW L2 EVSE during a long trip. There will
be a
strong demand for L3 EVSEs strategically located for long trips,
similar to
the Tesla superchargers. I expect since most people will use these
infrequently they will be willing to pay for use. Whether an
acceptable roi
can be generated for the owner of the L3 is yet to be determined, but I
expect that eventually demand will be strong enough that price can
increase
to give acceptable roi. The new ev owners will likely "top off" any
chance
they get in town for a while, until they learn from experience that it
is
unnecessary. There will still of course be a need for L2 chargers, and
120V
outlets at apartment complexes, since 120V will still be sufficient for
most
of those just driving to work each weekday.
I'm afraid that will eventually leave people like me, with low voltage
packs, few places to charge away from home since we will not be able to
use
DC fast chargers whether or not we add the required connector and
circuitry
to our vehicles. But, that's a good thing, and we likely have quite a
few
years to go before that happens. Those who only use their conversion
for
local commuting will of course be unaffected.
With 6 years and over 46k miles on my pack I will likely be ready to
use it
for back up for my PV by then and buy one of those 200 mile range evs
rather
than try and convert a car with a high voltage pack. It is still going
strong, with little if any reduction in range, so should last a while.
--
View this message in context:
http://electric-vehicle-discussion-list.413529.n4.nabble.com/Why-all-EVgo-s-L3-EVSE-eggs-in-one-basket-a-paradigm-shift-of-charging-200-mi-EVs-tp4679127p4679137.html
Sent from the Electric Vehicle Discussion List mailing list archive at
Nabble.com.
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