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I purchased the 215 Ah 12V set of 4 cells. Shipping from China was as fast as could be expected and arrived a day early. Rachel was very helpful in providing a spec sheet and individual testing results on each cell I received. The included hardware was high quality. I did not purchase their BMS. These are high quality new Sinopoly prismatic cells. I have run my set through a full charge and discharge cycle, and confirmed the test she sent me on each individual cell. I was able to extract the full 215 Ah from the set without discharging any cell below 2.8 volts. They were well matched. At the price, I couldn't be happier!
The system is all installed now, and the batteries work great, hence I can update the rating to 5. As a crude test, I ran the 750 Watt microwave in 5 minute bursts, and after 45 minutes the battery was still holding up and I was getting bored with the test, so I stopped. I am very happy with the batteries.
I haven't capacity tested this yet, still busy installing the system and some parts are still outstanding. However, delivery was very quick and I was very gratified to receive a call from the supplier (in China) to check on my satisfaction. I will upgrade this review once I have capacity tested the batteries.