Check out these.
https://www.alibaba.com/product-det...tml?spm=a2700.icbuShop.66095.1.6cd7b917HA5Xn0
This vendor and the sales rep Amy, have been fully vetted by many members here. In fact members of this forum have bought over 5000 cells from Xuba since 15 Jan 2020.
Be sure and tell Amy that you are with this forum to get free buss-bars and fasteners.
Be sure your current equipment can be re-programmed to the specs of the battery.
You will need a Battery Management System (BMS) as well. Chargery is a brand that is well used by this forum.
Virtually every question you may have is answered in this thread:
https://diysolarforum.com/threads/xuba-electronics-deal-280ah-lifepo4-cells-purchase-review.3850/
Here is the original post that started it all. Thanks Michael.
https://diysolarforum.com/threads/j...1260-00-usd-delivered-grade-a-to-canada.3387/