₦airaland Forum

GloryJoyeux:
Disadvantages:
1. Welded cells (this is terrible)
2. 2021 manufacturers date ( so many red flags, even if they are grade A, where they stored in perfect condition for 4 years!) this is called Long term storage surplus or new old stock or Grade A- /B
3. You will only get you 280ah when u discharge to 2.5v. At 48v you will have less that 280ah

You're right on no. 3, I've not done the capacity test but looking at the battery voltage at 50%, it's obvious full capacity will be around 46v or below. And to think they even claim the real capacity is 300amps This is not a good buy. It's not that Hithium cells are bad, I've tested new ones with verified QR code that pulled full capacity better than EVE. It's the dishonest seller Deriy, selling used cells as brand new

KaylaDeriy:
Thanks for the interest in Deriy, let me answer them all.

1, Regarding the production of the battery cell is 2021, please add my WhatsApp, +190 68617017, so that I can check the batch of your product. Because sometimes, the software for scanning is made by human beings, and sometimes it will recognize wrongly, because some software is specially used to scan EVE and CATL kind of batteries.

2, Regarding the BMS's being set to charge at 40amp,I think all my clients in my telegram group know that I had shared a picture of the recommended parameters for BMS, which is as shown in the posted picture and we recommend 280amp charging.

1.
This shouldn't apply to all 16 cells in the Deriy Battery because I scanned all of them. You see there's a reason battery sellers like you hide QR code of cells, it's to hide the origin of the battery. If the battery is new like you claim, you should be proud that the customer would be able to scan the QR code & verify that it's brand new like you claim. It helps your marketing, but you use fake QR code to hide the battery origin. Looking at the QR code image I posted, you will see it's lacking battery capacity & other info. So its very bad you're selling an unknown battery & passing it off as new. If you're in the market to buy a lifepo4 battery today, would you buy one that's made in 2021?
Selling used grade B or C batteries won't be difficult, just be honest about it. People will be happy to buy them once the price is right. Besides these are just fake codes...

2.
The image you posted is in Chinese, but see the English version in my image. Are you seriously trying to pass off battery capacity as the charging amps? As you can see in the image 280amps is the battery capacity... Meanwhile in your manual you strongly recommend charging the battery at not more than 0.3c, why? If you now recommend charging at 1c, is it not better you reflect that on the manual. Manual is attached.
Is there a specific problem with the cells that they can't take 1c charging? Pls you need to address this here so that people should be aware before making the purchase decision. This is very important because one of the advantages of lifepo4 chemistry over others is fast charging, if people can't take advantage of that with Deriy battery, then they can look elsewhere.

It's nice that you're no longer using welded cells because they're not DIY friendly. Most DIYers here would agree that bolted busbars are better, whether flexible or not since the battery will always be stationery.

KaylaDeriy:
I understand what you're saying, and I'm sorry that we're sold out of all batteries.

We underestimated the demand for lithium batteries in Nigeria and that caused us not to prepare enough stock.

But starting this month, we have prepared a lot of batteries to send to Nigeria.

Since the shipping time is about 3 months, the earliest batteries can arrive at the moment will be at the end of May.

Thank you for your suggestion, but I believe our batteries are worth the wait. Our batteries are all Grade A, and brand new. For the price of this quality, I dare say we are the best deal in Nigeria.

Except they're not all brand new, at least from the one I tested.

The problem with Deriy 14.3Kwh Hithium White Battery with MCCB is the cells are not brand new. See the attached image of the QR code. How can you say cells manufactured in 2021 are brand new?! Or are these fake QR codes? Whichever it is, it's still false marketing.
The BMS (image attached) was programmed to charge at 40amps, new cells are supposed to support charging at 1c. Or are the Hithium cells in Deriy different?
In Southern Nigeria lifepo4 needs to be charged as fast as possible because of the weather, the sky is not always clear like in the north. So anyone with high PV output should be able to charge at 1c or 0.5?

One more thing is the Deriy 14.3Kwh Hithium White Battery with MCCB is not DIY friendly because the cells are welded (image attached)
It won't be easy to replace a cell if something goes wrong in the future. DIYers should have this in mind before buying Deriy battery pack. You get what you pay for but KaylaDeriy shouldn't be marketing these as brand new, they're definitely not.

Nice community you guys have here, researching this battery to get more info & Google landed me on this thread. Capacity test to follow soon, these are first observations.