Hi Victor and All,
--- Victor Tikhonov <[EMAIL PROTECTED]> wrote:
> "David Roden (Akron OH USA)" wrote:
> >
>
> > > LiIon TS-LP42V
> > > Price $1300 in 1001 qty
> > > Weight 35Kg
> > > 100Ah * 42V = 4200Wh
> > > energy density 120Wh/Kg or 154Wh/Litre
> > > price per kWh: $309
> > > Cycle life: 500@80%DOD
> > >
> >
> > When you factor in cycle life and look at cost per
> (theoretical) delivered
> > kWh, nicads come out even better, 21% to 60% lower
> per kWh:
> >
> > NiZn MB100-12 (taking cycle life as 800, a guess):
> $0.61 / kWh
> >
> > LiIon TS-LP42V (cycle life 500) $0.62 / kWh
> >
> > Nicad STM5-100MR
> > (cycle life 1000, 120ah): $0.48 / kWh
> > (cycle life 2000, 100ah): $0.29 / kWh
> > (cycle life 3000, 80ah): $0.24 / kWh
> >
>
> To add a few data points to TS-LP42V:
>
> cycle life > 500 at 80 Ah: $0.618/kWh
> cycle life > 1200 at 50 Ah: $0.26/kWh
> cycle life > 2400 at 20 Ah: $0.13/kWh
If they actually last this long and who would only
use 20% of their batt capacity?
>
> Not quite as good as NiCd, but the pack is twice as
> light.
>
> Question:
>
> How come MRE100 are 120 Ah, not 100Ah?
Because they are used in industral, aero, mine are
from medical use and they always overrate them for
safety, long life. Mine are 27+ years old and still
even with bad abuse they put out more than it's
rating.
Will Lithium, Ni-MH do that? They cost 3x + as
much too.
>
> cycle life 1000 at 100% dod is not valid point, you
> don't get
> any performance at about last 5% of capacity (sag)
> so
> while SOC is still 5% (not 0%) the battery, while
> won't get
> damaged, is not useable.
But ni-cads are overspec so they can and do.
Can Li-ion or Ni-MH?
>
> If you only look at life time nothing beats NiCd.
But lifetime is the big thing!!!
They put out higher spec power, much easier,
faster, cheaper charger-ing, cheaper to buy, run,
takes abuse well, no problem with cold weather and
better in hot than the others high tech, LA batts.
Other than these the others are okay!!!!
What more could you want?
>
> All to all, PbA everyone uses comes out almost the
> most expensive
> per kWh for its life. Majority is not so rich, nor
> uneducated, so
> my guess lowest initial out of pocket cost is the
> first priority...
Where did you get that?
Golf cart batts beat ni-cad about 30/40% over 20
years in $/mile.
I agree that SLA's are more expensive than
ni-cads and probably Ni-zn depending on app but for
overall price you can't beat golf cart batt!!!
In fact the main problems with your ac systems
is the # of batts/ cells you need causing you to use
expensive, short lived, low capacity batts or really
pricy higher tech ones and pricy chargers for either.
jerry dycus
>
> Victor
>
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