Re: [RE-wrenches] Max charge for lithium batteries

2021-11-01 Thread Chris Mason 
You can absolutely charge to 100% and you can discharge to 100%. Lithium is
in another world compared to Lead Acid. You don't see LA cars driving
around.
But you shouldn't leave Lithium at 100% for months on end, it can be
detrimental. That's not likely to be an issue for solar systems.
Your absorption voltages are only for non-485 inverters that don't know
about Lithium. The question was whether you can charge to 100% and yes, you
absolutely can, because 100% is no 100%, there is a recommended voltage and
a do-not-exceed voltage.


On Mon, Nov 1, 2021 at 2:43 PM frenergy  wrote:

> Hey Folks,
>
> From the SimpliPHI/Outback integration guide download, using
> an Outback (I assume any brand of) charge controller (EG: FM80, FM60,
> FM100), their chart shows absorbtion voltage at 56.4 for 51.2 nom PHI
> batteries with time set at 6 minutes, page 18.  If using the inverter, they
> show 54.0 volts for 2 hrs, page 13.
>
> I found this at their website:
> https://simpliphipower.com/product-documentation/
>
> then scroll down.  There may be a longevity advantage to not fully
> charging L-ion batteries but if you're only charging to 80% and not really
> supposed to go below 20% SOC then L-ion batteries aren't looking much
> better than FLA batteries in terms of capacity.
>
> Bill
>
> Feather River Solar Electric
> On 11/1/2021 10:03 AM, Chris Mason wrote:
>
> There's no benefit to charging to 100%. If the charging parameters are set
> up correctly, you'll never really get to 100%.
> If you look at most prismatic cells, the absolutely maximum voltage is
> 3.65V. My systems are set up to charge to 3.4V or 54.4V. I take that as
> 100%.
>
>
>
> On Sun, Oct 31, 2021 at 12:19 PM 
> wrote:
>
>>
>> I have a client that insists it is better not to charge lithium
>> batteries to 100%. Is there any truth to this?
>>
>> Thanks,
>>
>> Drake
>>
>>
>> Drake Chamberlin
>> Athens Electric LLC
>> Ohio Electrical Contractor’s License 44810
>> CO Master Electrician’s License 4526
>> NABCEP Certified PV Installation Professional
>>
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>
> --
> Chris Mason
> Solar systems designer
> Generac Generators Industrial technician
>
> Comet Systems Ltd DBA Comet Solar
> Anguilla Cell  264.235.5670
> WhatsApp 264.235.5670
> Skype: netconcepts
> www.cometsolar.com 
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-- 
Chris Mason
Solar systems designer
Generac Generators Industrial technician

Comet Systems Ltd DBA

Re: [RE-wrenches] Max charge for lithium batteries

2021-11-01 Thread frenergy 

Hey Folks,

            From the SimpliPHI/Outback integration guide download, 
using an Outback (I assume any brand of) charge controller (EG: FM80, 
FM60, FM100), their chart shows absorbtion voltage at 56.4 for 51.2 nom 
PHI batteries with time set at 6 minutes, page 18.  If using the 
inverter, they show 54.0 volts for 2 hrs, page 13.


            I found this at their website: 
https://simpliphipower.com/product-documentation/


then scroll down.  There may be a longevity advantage to not fully 
charging L-ion batteries but if you're only charging to 80% and not 
really supposed to go below 20% SOC then L-ion batteries aren't looking 
much better than FLA batteries in terms of capacity.


Bill

Feather River Solar Electric

On 11/1/2021 10:03 AM, Chris Mason wrote:
There's no benefit to charging to 100%. If the charging parameters are 
set up correctly, you'll never really get to 100%.
If you look at most prismatic cells, the absolutely maximum voltage is 
3.65V. My systems are set up to charge to 3.4V or 54.4V. I take that 
as 100%.



On Sun, Oct 31, 2021 at 12:19 PM 
 wrote:



I have a client that insists it is better not to charge lithium
batteries to 100%. Is there any truth to this?

Thanks,

Drake


Drake Chamberlin
Athens Electric LLC
Ohio Electrical Contractor’s License 44810
CO Master Electrician’s License 4526
NABCEP Certified PV Installation Professional

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--
Chris Mason
Solar systems designer
Generac Generators Industrial technician

Comet Systems Ltd DBA Comet Solar
Anguilla Cell  264.235.5670
WhatsApp 264.235.5670
Skype: netconcepts
www.cometsolar.com 

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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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Re: [RE-wrenches] Max charge for lithium batteries

2021-11-01 Thread Chris Mason 
There's no benefit to charging to 100%. If the charging parameters are set
up correctly, you'll never really get to 100%.
If you look at most prismatic cells, the absolutely maximum voltage is
3.65V. My systems are set up to charge to 3.4V or 54.4V. I take that as
100%.



On Sun, Oct 31, 2021 at 12:19 PM 
wrote:

>
> I have a client that insists it is better not to charge lithium
> batteries to 100%. Is there any truth to this?
>
> Thanks,
>
> Drake
>
>
> Drake Chamberlin
> Athens Electric LLC
> Ohio Electrical Contractor’s License 44810
> CO Master Electrician’s License 4526
> NABCEP Certified PV Installation Professional
>
> --
> ___
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
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>

-- 
Chris Mason
Solar systems designer
Generac Generators Industrial technician

Comet Systems Ltd DBA Comet Solar
Anguilla Cell  264.235.5670
WhatsApp 264.235.5670
Skype: netconcepts
www.cometsolar.com 
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[RE-wrenches] Max charge for lithium batteries

2021-10-31 Thread drake . chamberlin 


I have a client that insists it is better not to charge lithium 
batteries to 100%. Is there any truth to this?


Thanks,

Drake


Drake Chamberlin
Athens Electric LLC
Ohio Electrical Contractor’s License 44810
CO Master Electrician’s License 4526
NABCEP Certified PV Installation Professional

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