I thought that at freeway speeds the weight of the vehicle doesn't make
much difference. But how "slippery" it is does. Unless, of course,
you're going 186 miles all uphill.
Peri
------ Original Message ------
From: "Lee Hart via EV" <ev@lists.evdl.org>
To: "tomw" <tomofreno2...@yahoo.com>; "Electric Vehicle Discussion List"
<ev@lists.evdl.org>
Sent: 18-May-15 11:40:19 AM
Subject: Re: [EVDL] EVLN: Open Source Street-Legal affordable long-range
EV4the masses
tomw via EV wrote:
At over 4700 lb Tesla is hardly the benchmark for efficiency. My 2260
lb ev
5 1/2 year average energy use is 216 Wh/mile from the wall, with about
50%
travel on highways at 55 - 65 mph. Charger efficiency, measured
several
times, is 0.91, so that's about 197 Wh/mile or 5.1 miles/kWh excluding
charger losses.
That excellent, Tom. Remind me again what your EV is?
A range of 186 miles for my vehicle would require about a 46 kWh pack,
assuming 20%
DoD...
Should that be 80% DOD (i.e. 80% of the capacity of the pack used)?
This vehicle is supposed to be lighter than mine, but still likely
will need
significantly larger than 24kWh pack for 186 miles. I expect like
others
gone before it will not be completed, but there is always some hope.
There is hope for going 186 miles on 24 KWH. It just requires a very
efficient design that is scratch-built as an EV, and not just an IC
conversion or other car built with the same heavy steel construction as
ICEs.
For example, the Solectria Sunrise went over 200 miles on a charge with
its 26 KWH nimh pack on *many* occasions, and even exceeded 300 miles
with James Worden hypermiling at the wheel.
-- A designer knows he has achieved perfection not when there is
nothing left to add, but when there is nothing left to take away.
-- Antoine de Saint Exupery
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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