Re: [RE-wrenches] Lithium battery charge rate

2023-06-28 Thread Dave Angelini Offgrid Solar via RE-wrenches 


Steve, you folks still sell the Discover 6650 ? that I use alot. It is 
faster than C2, they claim. Not that one would want that offgrid where 
long life is required. Pretty amazing battery for winter genset use.


ROLLS S24-2800LFP & S48-6650LFP ESS OPERATING MANUAL

ENHANCED RUNTIME

* Double the high-current runtime of lead-acid battery
* Up to 100% usable capacity
* Up to 100% depth of discharge

EXTENDED SERVICE LIFE

* 10x the life of lead-acid battery (BCI-06)
* Unlimited Partial State of Charge cycles
* 10-year energy throughput warranty (Requires Registration)

FAST CHARGING

* Up to 5x faster than new lead-acid batteries
* Up to 10x faster than aged lead-acid batteries
* 2X faster charging than C/2 Rated lithium batteries
* 1C continuous charge rate, regardless of SoC

SURGE POWER

* Power for off-grid inverter surge demands
* Up to 3C peak power discharge rate
* 1C continuous discharge ra

Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail  offgridso...@sti.net
text 209 813 0060

On 2023-06-28 8:50 am, Steve Higgins via RE-wrenches wrote:


Yes, thanks, Darryl...   I did mean the C/2 or C/3 rate...

[1]
Steve Higgins ⋅ Technical Services Manager
t +1.902.597.4020  m +1.206.790.5840
f +1.902.597.8447  e st...@surrette.com
[2] [3] [4] [5]

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On Wed, Jun 28, 2023 at 8:47 AM Starlight via RE-wrenches 
 wrote:
That makes more sense, Darryl, thanks for sharing that. Another good 
example, Jay.


We do have batteries that can be charged at 3C but I have only designed 
one mobile medical unit with that capability. It required 2 50A shore 
power connections or could use the onboard 20kW generator. Makes lots 
of heat doing so and heat is battery enemy #1, molten salt batteries 
excluded. Lower operating temperatures is a good reason for using lower 
C rates.


Larry Crutcher
Starlight Solar Power Systems

On Jun 27, 2023, at 7:49 PM, Darryl Thayer via RE-wrenches 
 wrote:


Hi Jay and all,  I belive Steve meant C/2 or C/3; just a typo. My 
oldest set of LiFe is almost 10 years?  It has a fastest charge rate of 
C/0.2  because the 10 kWh is charged by 1.6 kW solar.  These batteries 
are doing fine.  I do not have a way of measuring the current capacity 
but


On Mon, Jun 26, 2023 at 3:58 PM Jay via RE-wrenches 
 wrote: Hi All


I'm wondering if minimum charge amps for lithium is common or not?

Or does it have to do with the cell shape: cylindrical vs prismatic vs 
pouch?


A client purchased some EG4 batteries and they are getting a bit out of 
balanced. Tech support didn't suggest higher volts or longer absorb but 
did mention they need 30-50 amps charge. It's not in the manual.


Wondering what you all think and know

Thx
Jay ___
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Re: [RE-wrenches] Lithium battery charge rate

2023-06-28 Thread Steve Higgins via RE-wrenches 
Yes, thanks, Darryl...   I did mean the C/2 or C/3 rate...


 
 
 
 
 
 
 
 
 
Steve Higgins ⋅ Technical Services Manager
t +1.902.597.4020  m +1.206.790.5840
f +1.902.597.8447  e st...@surrette.com










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On Wed, Jun 28, 2023 at 8:47 AM Starlight via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> That makes more sense, Darryl, thanks for sharing that. Another good
> example, Jay.
>
> We do have batteries that can be charged at 3C but I have only designed
> one mobile medical unit with that capability. It required 2 50A shore power
> connections or could use the onboard 20kW generator. Makes lots of heat
> doing so and heat is battery enemy #1, molten salt batteries excluded.
> Lower operating temperatures is a good reason for using lower C rates.
>
> Larry Crutcher
> Starlight Solar Power Systems
>
>
>
>
> On Jun 27, 2023, at 7:49 PM, Darryl Thayer via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
> Hi Jay and all,  I belive Steve meant C/2 or C/3; just a typo. My oldest
> set of LiFe is almost 10 years?  It has a fastest charge rate of C/0.2
> because the 10 kWh is charged by 1.6 kW solar.  These batteries are doing
> fine.  I do not have a way of measuring the current capacity but
>
> On Mon, Jun 26, 2023 at 3:58 PM Jay via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> Hi All
>>
>> I’m wondering if minimum charge amps for lithium is common or not?
>>
>> Or does it have to do with the cell shape: cylindrical vs prismatic vs
>> pouch?
>>
>> A client purchased some EG4 batteries and they are getting a bit out of
>> balanced. Tech support didn’t suggest higher volts or longer absorb but did
>> mention they need 30-50 amps charge. It’s not in the manual.
>>
>> Wondering what you all think and know
>>
>> Thx
>> Jay
>>
> ___
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Re: [RE-wrenches] Lithium battery charge rate

2023-06-28 Thread Starlight via RE-wrenches 
That makes more sense, Darryl, thanks for sharing that. Another good example, 
Jay.

We do have batteries that can be charged at 3C but I have only designed one 
mobile medical unit with that capability. It required 2 50A shore power 
connections or could use the onboard 20kW generator. Makes lots of heat doing 
so and heat is battery enemy #1, molten salt batteries excluded. Lower 
operating temperatures is a good reason for using lower C rates.

Larry Crutcher
Starlight Solar Power Systems




On Jun 27, 2023, at 7:49 PM, Darryl Thayer via RE-wrenches 
 wrote:

Hi Jay and all,  I belive Steve meant C/2 or C/3; just a typo. My oldest set of 
LiFe is almost 10 years?  It has a fastest charge rate of C/0.2  because the 10 
kWh is charged by 1.6 kW solar.  These batteries are doing fine.  I do not have 
a way of measuring the current capacity but 

On Mon, Jun 26, 2023 at 3:58 PM Jay via RE-wrenches 
mailto:re-wrenches@lists.re-wrenches.org>> 
wrote:
Hi All

I’m wondering if minimum charge amps for lithium is common or not?

Or does it have to do with the cell shape: cylindrical vs prismatic vs pouch?

A client purchased some EG4 batteries and they are getting a bit out of 
balanced. Tech support didn’t suggest higher volts or longer absorb but did 
mention they need 30-50 amps charge. It’s not in the manual. 

Wondering what you all think and know

Thx
Jay
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