I think you are way off on weight and cost. I know you are talking about the cells alone, but the actual retail cost will be much more then what you are calculating. These new lithium batteries will still be the best choice, but I don't want anyone thinking they will be gettting 10kwh batteries for $1100, at least not for several more years.
Powerwall 2
Weighs 122kg
14kwh
$5500
$393/kwh
On May 11, 2017 4:44 AM, "Dan maitland captmaitland@gmail.com [electricboats]" <electricboats@yahoogroups.com> wrote:
Thanks BobOn Wed, May 10, 2017 at 3:37 PM, Bob Moriarty moriartybob@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:I am using the specs from Hannu's earlier email presumably pertaining to the 2170 batteries that will be coming out of Tesla's Gigafactory in the near future.<Quote>Key facts;
Old density was 260 WH/kg.
New density is 380 Wh/kg in a 27100 package. (I think Hannu transposed the 7 and the 1)</Quote>380 Wh / kg = 10,000 Wh / 26 kgMy 10,000 Wh AGM bank weighs 273 kg.-------For price comparison I used near-future manufacturing cost.<Quote>Old (Tesla, purchase/manufacture, paid to panasonic (PANA)) cost was
about 180$ / 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: Kev <captainyoung@gmail.com>
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