Engineer34 said:

If you're seeking more details, please visit our website.

I am intrigued by the economic perspective of prismatic batteries as well. They claim to offer extended cycle lives.
However, how many cycles can salvaged batteries actually provide?

From my investigation, I found that some new batteries are rated for a life of just 500 cycles, which raises the question of salvaged cells' longevity. Why then is everyone opting for prismatic cells?
It should be significantly more cost-effective than new prismatic cells, correct? Can anyone provide concrete figures to clarify this?

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(Lithium-ion cells) have the potential to exceed 500 days in a DIY solar setup, but I question the length of their lifespan.
Have a look at a discussion initiated by @Generic -

Additionally, Battery University provides valuable insights -

A notable aspect of (salvaged cells) is their construction of 'numerous smaller units' as compared to a bank of larger prismatic cells. As my battery array ages, it may fail in clusters of cells sporadically, rather than experiencing simultaneous failure across all cells; hence, I might be able to prolong their lifespan through routine cell upkeep, which is the rationale behind designing serviceable packs.

Our Journey

Our batteries are genuinely classified as "A" grade and shipped directly from the Sinopoly manufacturing facility.

They are not "B" grade batteries that have been re-labeled as "A" on platforms like Alibaba for the U.S. and European markets.

Our batteries are genuinely classified as "A" grade, sourced directly from the Sinopoly facilities.

Challenges in Acquiring Grade-A LiFePO4 Cells

I would like to introduce myself and provide insights into the Lithium market, highlighting why it is essential to source your batteries from Sinopoly USA.

I am Alex Dorsey. My adventure began years ago as I set sail around the world. I solo navigated the Pacific on a 28' sailboat. Now, nearly two decades later, I continue this voyage with my wife Carla from Argentina and our two rescue dogs, Nacho and Chewie (www.projectbluesphere.com).

In mid-2010s, my interest in LiFePO4 batteries peaked, a logical upgrade due to our reliance on solar energy for full-time living. Identifying a reliable source for LiFePO4 cells was crucial. After a thorough six-month investigation, I decided on a "verified" supplier on Alibaba, purchasing sixteen top-tier (A-quality and paid a premium for A) 200Ah cells under the "Trade Assurance" program. I believed I had all bases covered.

However, after patiently waiting nearly two months and rigorously testing the cells, I was deeply disappointed. Testing these substantial capacity cells is a lengthy and demanding process that many skip. It turned out two cells were defective, and the supplier had to replace them. Ultimately, I found myself with 18 B-quality cells instead, damaging my expectations set by the "trade assurance" program which neglected my claims three and a half months post-order. While they functioned reasonably well, I had to tweak my charging protocols and accepted that their longevity would fall short of the manufacturer's claims.

It is worth noting that grade-B cells and/or reused batteries hold undeniable value. My grade-B LiFePO4 bank outshines every other battery technology I've encountered over my 31 years on the water. Yet, grade B was not what I desired or invested in; I anticipated longevity exceeding 12 years, which I recognize will not materialize.

Diving deeper into a solution, I was determined to unravel why acquiring A-quality LiFePO4 cells is such an uphill battle for both Americans and Europeans. This tale is multifaceted requiring an understanding of the industry dynamics, the regulatory landscape in China, lithium shipping regulations, and America’s trade relations with China.

Firstly, every A-grade cell produced is often sold preemptively. The global push against climate change fosters a stringent demand for lithium-powered electric vehicles and large-scale lithium storage solutions. The reality is the industry operates at full capacity, with factories directed towards not servicing individual consumers.

Secondly, 3-12% of any production run is typically classified as B quality due to stringent factory standards. Exporting B-quality cells is illegal for Chinese manufacturers, resulting in the necessity of selling them at discounted rates to local purchasers, who subsequently distribute them through platforms like Alibaba to global customers. Bulk purchases often end up on Amazon and eBay, leading to an influx of inferior, non-durable cells.

On the topic of shipping costs, it’s noteworthy that the price for container shipping soared due to the Covid crisis, escalating from $1,500 to almost $8,000 over the past year.

Moreover, a 25% tariff related to the trade war impacts importing these batteries into the U.S. in addition to a standard 2.5% import tax. This translates to an added $2,750 in import duties on a $10,000 order, excluding shipping, insurance, lithium handling fees, or storage costs.

If you conduct some extensive research, it will become apparent just how laden with costs and regulations the process is, making the acquisition of authentic grade-A LiFePO4 cells a challenge.

Driven by determination, I navigated numerous discussions across eight months with various Chinese manufacturers, creating vital contacts. The lithium sector resembles a modern-day gold rush, with fierce competition for profitable positioning. Along the way, I successfully built robust relationships with players in the industry, particularly Sinopoly. Recognized as one of the largest and longest-standing LiFePO4 producers, they are a commendable team committed to quality battery production, deeply rooted in environmental stewardship.

This marked the inception of Sinopoly, sinopolyusa.com, and sinopolyeu.com.

After extensive negotiations spanning eight months, I carved out a small niche for the DIY LiFePO4 community within this vast ecosystem.

I assure you of access to genuine A-quality LiFePO4 battery cells directly from the Sinopoly factory at equitable prices. Initially, I will ship directly from Sinopoly’s Chinese facilities, but I plan to store inventory in Canada and Italy for more accessible distribution in the Americas and Europe.

My primary focus will support B2B relations while also addressing the needs of the B2C community, with a goal of assisting others in establishing globally based businesses, enabled by my wholesale pricing arrangements with Sinopoly.

For any inquiries, please do not hesitate to reach out to us.

Wishing you peace and smooth sailing.

- Alex