Dynasty AGM Battery Info

[Mark Farver <farver@mindbent.org>]

I just talked to one of Dynasty's distributors in N Texas. (I tried
calling the factory direct, but they refuse direct sales).  She said the
DCS-100's was designed for wheelchair applications, and replaced a line of
Gel Cells.  Her customers were reporting fairly poor perfomance and she
recommended against them.

The other thing I noticed was Dynasty has a UPS battery which seems to be
rated for the high currents one would expect in EV usage (its actually
rated for a 15 minute discharge).  The hawker's work fairly well, and they
are UPS batteries.

When I gave out the required specs (1hr discharge, constant currents in
the 100amp range with spikes up to 600) the Dynasty rep also recommended
the "high-rate" UPS batteries, specifically the 310, and 370 series.

Quoted cost would be about $110 for the 310, and about $145 for the 370
(The web spec pages are below).

I'm seriously considering them as an alternative to the Optima's, but I
need to check if I'll have sufficent space.

If anyone is interested here are some comparison numbers I did (my MR2
weighs approx 2000lbs empty so 1000lbs of batteries, or 1/3 vehicle weight
was my goal (all my comparisons were done at the 20Hr rate since that is
the only published spec for the Optima's, despite the innaccuracies.)

Using the Dynasty UPS12-310:
  15 batteries @ 67lbs each: 1005lbs
  88AH @ 180VDC (15.4Kwh) = $1650

Using the Dynasty UPS12-370:
  14 batteries @ 74lbs each: 1036lbs
  100AH @ 168VDC (16.8 Kwh) = $2030

or

  13 batteries @ 74lbs each: 962lbs
  100AH @ 156VDC (15.6 Kwh) = $1885

but I can move to a lower voltage controller, which would knock a few
bucks off ($300 comparing T-Rex 600 vs Raptor 600) and save money on
components breakers, DC/DC's and the like)

as a contrast the Optima YT:
   20 batteries @ 43lbs each: 860lbs
   55AH @ 240VDC (13.2Kwh) = $2280 @ $114 each.
   (I got one quote of $104 each but the vast majority were from $114 and
up)

and a Trojan T145 (which wouldn't fit in the MR2, and would be too low
a voltage, probably I would need to go to a smaller battery to reach a
minimum voltage)
   14 batteries @ 72lbs each: 1008lbs
   244AH @ 84VDC (20.4 Kwh) = $980 @ $70 each


Dynasty 310 Spec page:
http://www.dynastybattery.com/cd_dyn/products/batteries/ups/ups12310.htm

Dynasty 370 Specs:
http://www.dynastybattery.com/cd_dyn/products/batteries/ups/ups12370.htm


Thoughts?

Mark Farver
mfarver@mindbent.org

-- 
"The greatest dangers to liberty lurk in insidious enroachment by men of
zeal, well-meaning but without understanding."
-- Justice Louis O. Brandeis, Olmstead vs. United States