[RE-wrenches] Tesla 2.0
frenergy
frenergy at psln.com
Sun Mar 12 00:30:30 EST 2017
Am I missing something? We all know of a couple notable L-ion related=20
issues such as the Samsung cell batteries and there were 3-4 Boeing 767=20
batteries that flamed out but these are relatively isolated incidents=20
compared to the hundreds of millions of L-ion batteries of that same=20
chemistry out there that are working fine.
I have had and have heard a number of reports on this list=20
of various levels of severity of thermal run-a-ways of LA batts, some=20
pretty nasty. There are all sorts of protection for worst case=20
scenarios integrated in cars, houses, woodstoves, water heaters, the=20
list goes on. Somehow we have managed to survive the fact that there=20
are some 300 million cars driving around with tanks of gasoline strapped=20
to our cars.
I suspect L-ion batteries in electric cars are here for=20
awhile. There have been very few fires in the hundreds of thousands of=20
electric cars on the road. Last I checked, the stats were better than=20
fires from cars with gas tanks. Of course the electric car battery has=20
to be light. Lithium iron would never work for mobile apps. As time=20
goes on, the industry will make L-ion batteries even safer.
Bill
Feather River Solar Electric
On 3/11/2017 1:06 PM, Ray wrote:
>
> Simpliphi is another Li+ that is very much worth looking at too. It=20
> comes in nominal voltages that are usable (unlike Tesla) such as 12 v,=20
> 24v, and 48 v. It is also rated to 10,000 cycles to 80% DOD, which=20
> actually could outlast the rest of the system. It is Lithium Iron=20
> phosphate which is heavier than the Tesla, but not prone to thermal=20
> runaway. I haven't tried them yet, so I'm just in study mode. The=20
> voltage stability as the battery discharges is very attractive. Even=20
> at high discharge rates, it holds above nominal voltage to 90% DOD.
>
> My problem is I have not been able to figure out how much we can under=20
> size these relative to their lead acid counterparts. Being that they=20
> have better capacity at high discharge rates, are less temperature=20
> sensitive, can't freeze, and can be discharged 100%, I'm guessing we=20
> can downsize them by about half, but I think it would really depend on=20
> the application.
> Anyone that is using Li+ (like Larry Crutcher) want to chime in on=20
> sizing of Li+ battery banks compared to lead acid? Downsizing is the=20
> only way we could possibly start making these affordable.
>
> R. Ray Walters
> Chief Technical Officer, RemoteSolar.com
> BS Mech Engineering, 1988
> Former NABCEP Certified, 2004-2016
> Licensed Master ELectrician, Colorado
> 303 505-8760
> On 3/11/17 9:51 AM, Chris Mason wrote:
>> Don't ignore Sonnen, their ECO16 is a solid Lithium based solution.=20
>> We installed one in Anguilla and, once we got through some software=20
>> issues, the system performed solidly.
>>
>>
>> On Fri, Mar 10, 2017 at 9:43 PM, jay <jay.peltz at gmail.com=20
>> <mailto:jay.peltz at gmail.com>> wrote:
>>
>> HI All,
>>
>> I hesitate to bring this up, but I=E2=80=99ve had some questions com=
e my
>> way about the =E2=80=9Cnew=E2=80=9D Tesla 2.0
>> battery backup units. And with the demise of Aquion, looks like
>> Lithium and LA are pretty much the only games in town.
>>
>> I have been able to find quite little on line ( surprise), pretty
>> much nothing from Tesla directly, but some from other folks by
>> google search.
>>
>> Does anyone on the list here know anything solid?
>> For example.
>> what inverter is being used?
>> how do they stack?
>> battery chemistry?
>> actual size ( depending on which info it changes)
>> are they actually shipping?
>>
>>
>> Thanks
>>
>> jay
>>
>> peltz power
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>> --=20
>> Chris Mason
>> NABCEP Certified Solar PV Installer=E2=84=A2
>> Solar Design Engineer
>> Generac Generators Industrial technician
>>
>> www.cometsolar.com <http://www.cometenergysystems.com>
>> 264.235.5670
>> 869.662.5670
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>>
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--=20
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
www.frenergy.net
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