Thanks Bob
On Wed, May 10, 2017 at 3:37 PM, Bob Moriarty moriartybob@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
I am using the specs from Hannu's earlier email presumably pertaining to the 2170 batteries that will be coming out of Tesla's Gigafactory in the near future.<Quote>Key facts;
Old density was 260 WH/kg.
New density is 380 Wh/kg in a 27100 package. (I think Hannu transposed the 7 and the 1)</Quote>380 Wh / kg = 10,000 Wh / 26 kgMy 10,000 Wh AGM bank weighs 273 kg.-------For price comparison I used near-future manufacturing cost.<Quote>Old (Tesla, purchase/manufacture, paid to panasonic (PANA)) cost was
about 180$ / kWh;
thus new == 180$/ 1.45 ; == 124 $ / kWh
/ 1.1 due to using 50% less cells by volume; == 112 $ /kWh.</Quote>$112 / kWh = $1,112 / 10kWhI don't know how that would relate to wholesale or retail pricing.I'm not looking to replace my AGM bank.I'm just curious to see how it compares to near-future lithium energy density and cost.Quite an improvement!Cheers,--Bob MOx 1976 C&C 33
LOA: 32.87' / 10.02m
LWL: 26.42' / 8.05m
Displacement: 9800 lbs./ 4445 kgs.
Propulsion System: Electroprop Racer
Batteries: 4 X Northstar 210 FT Blue+Current Prop: 2-blade fixed 16X10X1
(original - came w/A4)
Jax, FL USA
On Wednesday, May 10, 2017 1:38 PM, "Kev captainyoung@gmail.com [electricboats]" <electricboats@yahoogroups.com> wrote:
Links to batteries you are thinking about?Yes, you have an error in weight and price. Lithium is about a third of lead weight for the same power, as a rule of thumb. And you can not get 10Kwh for $1000On Tue, May 9, 2017 at 1:04 PM, Bob Moriarty moriartybob@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:Was going to tack this on to one of Hannu's threads but figure it might be better in its own..Just trying to do a sanity check on the basic math, comparing my 48V AGM battery bank with Real Soon Now lithium ion prices/energy densities.Please point out my error(s). :-)My AGM bank:Capacity 10 kWh (210Ah @ 12V X 4 batteries in series)Weight 600 lbs (273 kg)Cost $3K USDReal Soon Lithium:Capacity 10 kWhWeight 1 kg/380 Wh X 10,000 Wh == 26.3 kg (Wow, that's a lot less than 273 kg)Cost ~$1K USD (@ $112/kWh)I must've lost a decimal point here and there in my calculations.Ox 1976 C&C 33
LOA: 32.87' / 10.02m
LWL: 26.42' / 8.05m
Displacement: 9800 lbs./ 4445 kgs.
Propulsion System: Electroprop Racer
Batteries: 4 X Northstar 210 FT Blue+Current Prop: 2-blade fixed 16X10X1
(original - came w/A4)
Jax, FL USA
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Posted by: Dan maitland <captmaitland@gmail.com>
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