I have now purchased 54 280 A Eve cells from Amy @ Shenzhen Luyuan in the last 12 months.
The first 16 were the received in October last year and were the original version with threaded terminals. I paid extra to have them tested before they left China and the data testing sheets showed 278-281Ah with the majority testing at 279Ah. Cost per cell was US$82. They shipped the cells before the test reports were made available to me, so I had no opportunity to accept or reject them. When the data was made available to me I questioned why the cells were under capacity but I was told they actually sent extras and sent me the best 16. The price paid, both for the cells and the freight was higher than other suppliers.
The next order was for four cells matched at the factory. I paid US$118 each in July. They took several weeks to ship them which I was not surprised as I understood they were more or less made to order by Eve. The data shows all four are very close to each other. They came with a instruction sheet written by a DIY Solar Forum member.
This shipment was very well packed with plastic protectors taped to the boxes.
The next order was for 34 cells. It was placed only a month after the previous order. This time I paid US$123 per cell. The cells shipped straight away. They were shipped out of Hong Kong somewhere without any plastic protection on the corners but all seemed to have arrived in good shape.
Based on the data below, they don't look matched to me. When I asked about it I was told they stopped having the factory match them and now they are just "to their specifications" whatever that means. So the question is did I get what I paid for? It looks to me like I just got 34 random cells and I should ask for a discount. On the one hand their data says I received batteries with considerably more than 280 AH capacity. If they test good that is a reasonable result, but it is not what I was expecting and not what the pictures and description on their websites says they will deliver. The price for random cells should be about US$90-$100 per cell?
All the test data for the latest two sets of batteries was supplied on a website. What you see is what I received, but I have removed the column showing the serial numbers. There is no factory marks, test results or anything with the shipments to indicate the testing has been done so although I believe they are legit it is not as convincing as it could otherwise be.
The first 16 were the received in October last year and were the original version with threaded terminals. I paid extra to have them tested before they left China and the data testing sheets showed 278-281Ah with the majority testing at 279Ah. Cost per cell was US$82. They shipped the cells before the test reports were made available to me, so I had no opportunity to accept or reject them. When the data was made available to me I questioned why the cells were under capacity but I was told they actually sent extras and sent me the best 16. The price paid, both for the cells and the freight was higher than other suppliers.
The next order was for four cells matched at the factory. I paid US$118 each in July. They took several weeks to ship them which I was not surprised as I understood they were more or less made to order by Eve. The data shows all four are very close to each other. They came with a instruction sheet written by a DIY Solar Forum member.
This shipment was very well packed with plastic protectors taped to the boxes.
Capacity(Ah) | OCV1(V) | Ri1(mohm) | OCV2(V) | Ri2(mohm) | OCV3(V) | Ri3(mohm) |
291.6849 | 3.303 | 0.13 | 3.301 | 0.14 | 3.295 | 0.13 |
291.5720 | 3.303 | 0.13 | 3.301 | 0.13 | 3.295 | 0.13 |
291.5328 | 3.302 | 0.13 | 3.301 | 0.14 | 3.295 | 0.14 |
291.2649 | 3.303 | 0.13 | 3.301 | 0.14 | 3.295 | 0.14 |
The next order was for 34 cells. It was placed only a month after the previous order. This time I paid US$123 per cell. The cells shipped straight away. They were shipped out of Hong Kong somewhere without any plastic protection on the corners but all seemed to have arrived in good shape.
Based on the data below, they don't look matched to me. When I asked about it I was told they stopped having the factory match them and now they are just "to their specifications" whatever that means. So the question is did I get what I paid for? It looks to me like I just got 34 random cells and I should ask for a discount. On the one hand their data says I received batteries with considerably more than 280 AH capacity. If they test good that is a reasonable result, but it is not what I was expecting and not what the pictures and description on their websites says they will deliver. The price for random cells should be about US$90-$100 per cell?
All the test data for the latest two sets of batteries was supplied on a website. What you see is what I received, but I have removed the column showing the serial numbers. There is no factory marks, test results or anything with the shipments to indicate the testing has been done so although I believe they are legit it is not as convincing as it could otherwise be.
Capacity(Ah) | OCV1(V) | Ri1(mohm) | OCV2(V) | Ri2(mohm) | OCV3(V) | Ri3(mohm) |
293.7461 | 2.802 | 0.13 | 2.788 | 0.14 | 3.296 | 0.13 |
293.6411 | 2.800 | 0.13 | 2.785 | 0.13 | 3.297 | 0.14 |
293.4271 | 2.798 | 0.14 | 2.783 | 0.13 | 3.297 | 0.14 |
293.1899 | 2.800 | 0.13 | 2.785 | 0.13 | 3.297 | 0.14 |
293.1389 | 2.794 | 0.13 | 2.779 | 0.13 | 3.297 | 0.14 |
293.0150 | 2.803 | 0.13 | 2.789 | 0.13 | 3.297 | 0.14 |
292.9602 | 2.799 | 0.14 | 2.782 | 0.14 | 3.296 | 0.14 |
292.9409 | 2.794 | 0.13 | 2.778 | 0.13 | 3.297 | 0.14 |
292.8514 | 2.803 | 0.13 | 2.788 | 0.13 | 3.297 | 0.14 |
292.6727 | 2.804 | 0.13 | 2.789 | 0.13 | 3.297 | 0.14 |
292.5830 | 2.799 | 0.13 | 2.784 | 0.13 | 3.297 | 0.14 |
292.4279 | 2.804 | 0.13 | 2.789 | 0.13 | 3.297 | 0.14 |
292.3730 | 2.800 | 0.13 | 2.784 | 0.13 | 3.297 | 0.14 |
292.3694 | 2.803 | 0.13 | 2.786 | 0.13 | 3.297 | 0.13 |
292.2645 | 2.803 | 0.13 | 2.786 | 0.14 | 3.297 | 0.14 |
292.1710 | 2.803 | 0.14 | 2.789 | 0.14 | 3.297 | 0.13 |
292.1009 | 2.801 | 0.13 | 2.788 | 0.13 | 3.297 | 0.13 |
292.0778 | 2.803 | 0.13 | 2.788 | 0.13 | 3.296 | 0.14 |
292.0775 | 2.801 | 0.14 | 2.786 | 0.14 | 3.297 | 0.14 |
291.8212 | 2.802 | 0.13 | 2.787 | 0.13 | 3.297 | 0.14 |
291.8211 | 2.799 | 0.13 | 2.782 | 0.13 | 3.297 | 0.14 |
291.7354 | 2.800 | 0.14 | 2.788 | 0.14 | 3.297 | 0.14 |
291.7277 | 2.800 | 0.13 | 2.785 | 0.13 | 3.297 | 0.14 |
291.7277 | 2.801 | 0.13 | 2.787 | 0.13 | 3.297 | 0.14 |
291.5332 | 2.802 | 0.14 | 2.790 | 0.14 | 3.297 | 0.13 |
291.2222 | 2.803 | 0.14 | 2.789 | 0.14 | 3.297 | 0.13 |
291.0667 | 2.804 | 0.13 | 2.789 | 0.13 | 3.297 | 0.14 |
291.0626 | 2.803 | 0.13 | 2.790 | 0.13 | 3.297 | 0.13 |
290.9654 | 2.804 | 0.13 | 2.790 | 0.13 | 3.297 | 0.14 |
290.7245 | 2.803 | 0.13 | 2.788 | 0.13 | 3.297 | 0.14 |
290.6233 | 2.800 | 0.13 | 2.785 | 0.13 | 3.297 | 0.14 |
290.5766 | 2.801 | 0.14 | 2.787 | 0.14 | 3.297 | 0.13 |
289.9622 | 2.803 | 0.13 | 2.789 | 0.13 | 3.297 | 0.14 |
289.9550 | 2.807 | 0.13 | 2.793 | 0.13 | 3.297 | 0.14 |
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