I went from 24V/428AH (22kWh gross) using 8X Rolls Surette S-550's to LFP.
1st Purchase was a Prebuilt Disaster with used EV cells a craptastic BMS and heaps of problems. (The ShunBin Disaster). In the end that became 24V/350-AH in the form of 2x 175AH "8S" packs with a proper BMS each.
Then I bought 8 Bulk EVE 280AH cells from Amy @ XUBA (No longer there and company no longer recommended due to lot of neg experience with company bt NOT Amy. Amy took over (OWNS) Luyuan Tech and now has one of the Best Reputations here.
I bought 8 Bulk EVE-280AH Cells from Amy @ Luyuan and they came out perfect but are clearly B/Bulk as they really diverge above 3.400Vpc.
I bought another 8 Grade-A Matched & Batched EVE-280's (all tested out as per the reports showed) to hold 290-292 AH Gross so a full 280AH from the Working Range of 3.000-3.400 and are very well matched & stay in the balance up to 3.500 with minimal divergence.
Amy Wan @ Luyuan Tech is Well Known and Well Respected here as a Top Vendor who delivers genuine Matched & Batched Cells and quality Bulk Cells dfirect from Manufacture, NOT brokers or resellers.
Vendor:
https://szluyuan.en.alibaba.com/
Contact Amy Way (Owner) via Chat/Messenger for ACCURATE SHIPPING QUOTE
Properly Matched & Batched cells are supplied with full test report through cycles.
* Can also supply BMS' and sundry supplies
(saves a LOT on shipping) if you put it all together.
** Mention you are coming from THIS Forum !
FYI: Shipping from China is a Major PITA and some Ports of Entry are exceptionally BAD, so depending on where you are it can be slow. At this time US West Coast is the worst worldwide, it's self fuelling backlog is just worsening daily. Bad enough that shippers are abandoning whole containers as the "storage Fees" while waiting for processing exceeds the value of the goods within.
I am now doing a full & final reconfiguration of my whole solar system and this includes harmonizing all of my battery packs and my main bank as well. Both Solar Systems are 24V so I want to get things unified and simplified.
All 24V Packs are simple 8S Builds. All Parts & Components can be had through Amy Wan, just provide Link & Info and she "MAY" even be able to get a better price too.
Each is getting the following:
JK-BMS [24S 2A 150A BT] with BlueTooth Part Number: B2A24S15P $143.29 USD
Product Link:
https://www.aliexpress.com/item/1005003104573871.html
-plus add: CANbus Module + RS485 Module $7.73 USD each
Product Link:
https://www.aliexpress.com/item/1005003451100409.html
- Each Pack is fused at the DC-BUS Bar with an MRBF 200A Fuse REF:
https://www.bluesea.com/products/category/16/72/Terminal_Fuse_Blocks
Money Saving TIP !
Many people buy bits & pieces from various suppliers and with each one, they take a shipping hit, even crap from across our own country get's a Pinch added to it for good measure. Using Amy as an example, if she supplies the battery cells and get's all the "BITS" like BMS, Ring Terminals and puts that all into one box, and ships with everything else the cost saving sare instant, and you also get all the goodies you need at once and so there is no Thumb Twiddling when you have parts in front of you... That makes everyone a bit cookoo !
BMS will require:
18-22AWG Ring Terminals for the Sense Leads.
7-AWG Ring Terminals if attaching direct to 7-AWG wires from the BMS _OR_ ONE 4-AWG Ring Terminal can accommodate the TWO 7-AWG. ( 7-AWG X2 = 4-AWG )
Please download
Luyuan Tech Basic Lifepo4 Assembly Guide you'll find that quite helpful.
Other links in my Signature may be of assistance to you as well.
Hope it helps, Good Luck