48V battery bank options?

Started by sidpost, March 18, 2021, 01:15:45 PM

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ClassicCrazy

Pretty sure if you crunch the numbers now and shop around the Lithium are going to be the better value .

Larry
system 1
Classic 150 , 5s3p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system 2
 5s 135w Kyocero , 3s3p 270w Kyocera  to Classic 150 ,   8s Kyocera 225w to Hawkes Bay Jakiper 48v 15kwh LiFePO4 , Outback VFX 3648 inverter
system 3
KID / Brat portable

sidpost

Mike,

  Lithium today versus Lead-Acid is a lot different in terms of pricing than what you found when you bought your batteries.

  I'm specifically looking at 3.2V 280Ah Rechargeable LiFePo4 Batteries.  16 of them are $1889 at my door.  Two strings are 28,672 WHr by my math at a cost of $3778.  To that, I would need to add the cost of a BMS which is TBD at the moment.  At an ~80% discharge threshold, our use capacity is similar.

  From the pricing I have done, mainly with L16 batteries, there is no way I can come close to that capacity for a similar cost.  Not to mention the complexity of storage for servicing and the connection complexity.

Best Regards,
Sid

qrper

Sid,

Do you have a link to those cells?

Mike
System one: 7kWp w/ Trina 250 W panels @90 Vdc. Classic 150 to 16-6 V U.S batteries. Trace 5548 sine wave inverter.
System two: 6kWp grid tie with solaredge inverter.
System three: Midnite Brat, two 120 W Astropower modules, 100 Ah battery. Runs the LED streetlight in the back yard.

sidpost

#18
Quote from: qrper on April 13, 2021, 05:35:09 PM
Sid,

Do you have a link to those cells?

Mike


https://szluyuan.en.alibaba.com/product/1600066773779-818604541/Free_Shipping_to_USA_16Pcs_3_2V_280Ah_Rechargeable_Iron_Lithium_Battery_Lifepo4_Battery_for_Solar_System_for_EV.html?spm=a2700.shop_plgr.41413.16.62074c8anDz5W1

I originally stumbled on to these batteries on Aliexpress.com and had a good exchange with Amy about them. Their Alibaba listing is a little more informative IMHO.
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Also, there is a lot of information and posting on these batteries and Amy Wan on https://diysolarforum.com/resources/luyuan-tech-basic-lifepo4-guide.151/.