[RE-wrenches] Tesla 2.0
frenergy
frenergy at psln.com
Sat Mar 11 21:30:30 PST 2017
Am I missing something? We all know of a couple notable L-ion related
issues such as the Samsung cell batteries and there were 3-4 Boeing 767
batteries that flamed out but these are relatively isolated incidents
compared to the hundreds of millions of L-ion batteries of that same
chemistry out there that are working fine.
I have had and have heard a number of reports on this list
of various levels of severity of thermal run-a-ways of LA batts, some
pretty nasty. There are all sorts of protection for worst case
scenarios integrated in cars, houses, woodstoves, water heaters, the
list goes on. Somehow we have managed to survive the fact that there
are some 300 million cars driving around with tanks of gasoline strapped
to our cars.
I suspect L-ion batteries in electric cars are here for
awhile. There have been very few fires in the hundreds of thousands of
electric cars on the road. Last I checked, the stats were better than
fires from cars with gas tanks. Of course the electric car battery has
to be light. Lithium iron would never work for mobile apps. As time
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
> comes in nominal voltages that are usable (unlike Tesla) such as 12 v,
> 24v, and 48 v. It is also rated to 10,000 cycles to 80% DOD, which
> actually could outlast the rest of the system. It is Lithium Iron
> phosphate which is heavier than the Tesla, but not prone to thermal
> runaway. I haven't tried them yet, so I'm just in study mode. The
> voltage stability as the battery discharges is very attractive. Even
> 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
> size these relative to their lead acid counterparts. Being that they
> have better capacity at high discharge rates, are less temperature
> sensitive, can't freeze, and can be discharged 100%, I'm guessing we
> can downsize them by about half, but I think it would really depend on
> the application.
> Anyone that is using Li+ (like Larry Crutcher) want to chime in on
> sizing of Li+ battery banks compared to lead acid? Downsizing is the
> 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.
>> We installed one in Anguilla and, once we got through some software
>> issues, the system performed solidly.
>>
>>
>> On Fri, Mar 10, 2017 at 9:43 PM, jay <jay.peltz at gmail.com
>> <mailto:jay.peltz at gmail.com>> wrote:
>>
>> HI All,
>>
>> I hesitate to bring this up, but I’ve had some questions come my
>> way about the “new” 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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>> --
>> Chris Mason
>> NABCEP Certified Solar PV Installer™
>> Solar Design Engineer
>> Generac Generators Industrial technician
>>
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--
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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