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https://diysolarforum.com/threads/basen-eve-280-dead-as-a-doornail-in-3-years.82396/#post-1066809 if you want to see.

Well I had some grade B 280s, died in 3 years, as in cell got puffed up and now has 0 volts. I capacity tested them last year and they had 265 AH out of 280 but what good is it now that its reading 0 volts just after 1 year. I also know other people with wieze having issues, they start...

You can't even get cells and a bms for that price let alone a case, which means chins is most def. using grade B cells, and if you search on youtube for chins failure you'll see plenty of people saying the same thing. SOK is still the minimum battery anyone should consider, alternatives from...

That would be a PIA I think, speaking of JBD you can basically BYPASS the password altogether so the Bluetooth is just as Bad or Good as SOK. Just download the overkillsolar app and access any JBD bluetooth battery. It just ignores the password altogether. I'm quite certain pretty much any...

I think the future will basically be manufacturers selling directly to customers like Tesla does with cars, no more margins for middlemen or very little. I remember working for a perfume store that closed up shop 8 years ago, basically the supplier that we were buying form started his own...

I would suggest going deeper and actually getting to the QR codes of the cells, Varter is known to use grade B cells:

They were held fairly well held in place, not compression but certainly no way to expand. I did not notice any breakage of the case, but when I removed the cell it definitely plumped up so the box was keeping the expansion in check. meh...

Guy called me up and said hey the battery is not working and when I got it to it it said cell undervolt, I'm thinking ok the balancing wire probably got loose. NOPE, it was on there snug, so I pulled the cell and measured it, damn 0 volts! I"m thinking some internal fault and the cell just self...

Well in the back of my mind I knew it was only a matter of time, and now in less than 3 years the basen 280 EVE "Grade A" is dead. Checked the voltage and its 0 volts (or 0.012 v). Purchased from Alex Chen in Feb 2021... This was in a 8s battery back with an overkill solar BMS, the other cells...

can you upload what you have, if it doesn't looks like this then you don't have the report: https://cdn.shopify.com/s/files/1/2398/3077/files/LF280K-1008-9_25_-3400pcs.xlsx?v=1700496327 Then I would demand they send one to you. Actually I think I have had enough of 18650 not sending test...

I don't know enough about catl qr codes but the fact that eel put a bs sticker ontop of the qr code already has alarm bells going off. here is something you can do, is peel back the cover and see if you see signs of sanding you will need rubbing alcohol or wax/grease remove to get rid of the...

some of these shunts you have to set the amperage like 50,100, or 150 otherwise the measure incorrectly. I have a little shunt like this: https://www.amazon.com/MELIFE-Multimeter-Impedance-Resistance-Voltmeter/dp/B09BQ1PLYT in this one you have to tell the lcd screen if its a 100A, 200A, or...

I don't recommend going with the 300AH you should get the 460 epoch as it does not have a metal case. I have seen all too many metal case battery rust especially in marine. Even fresh water boats. Plus the 300 only supports a maximum of 1 battery, so if you later want to expand it won't work...

I have experienced this, it just gets worse and worse, you can try the little heltech active balancers and it will help but it will also lower down other cells as it uses energy from them to help the bad cell... replacing it is a much better option.

@Rednecktek had a similar one, looks like these sellers are putting an active balancer only and now your inverter is what has to mange the voltage/charge/discharge rate. ghetto af.

Unfortunately 18650 does mess around with the shipping they are $25-35.00/cell shipping vs the $15.00-$20.00 they were. However the price was 115.00 / cell vs the 105/cell. So its a game with them.

Nice to see batteryhookup getting some attention, they have had the 280K with test reports for a while but no one seemed to be ordering. Hopefully this will start sending more customers there way.

No this is because JK and NEEY balancers will ramp up the voltage to 4-5v to balance them faster, NEEY does the samething I verified on my EEL battery, to balance I measured the output voltage, EVEN if I put max 3.65 volts, the bms will pump out 4.5-5.5v ! Way above. This is the reason why the...

Jake, Be a MAN and take off the black cover and clean it from edge to edge and post pictures of the QR code. Capacity Shamacity Test mean nothing, keeping these cells balanced is going to be your real challenge, better get an active balancer to keep these "special need" cells in place. Once...

https://www.alibaba.com/product-detail/Eve-LF280K-Lifepo4-Charger-Smart-Battery_1600924778866.html?spm=a2700.shop_plgr.41413.186.5ed329e9XUouqS same price Also unlike previously they aren't requiring container loads and will sell even a 4 pack. Worst case scenario even at $30.00/cell shipping...

I just stumbled across this and based on what I am seeing, The EVE official store could very well just kill off Luyuan and other alibaba sellers: https://www.alibaba.com/product-detail/EVE-LF280K-Lifepo4-3-2V-310ah_1600140733108.html?spm=a2700.shop_plgr.41413.9.2af72e93P0RAnB vs...

Well I don't think there is much price difference between these batts and batts from SOK / Epoch / SFK / AO Lithium they are almost the same price and they all are using JBD bms units. Yeah Java 300AH smart is 1k + sales tax or you can get the SOK 280 for $1k from SOK directly and pay no sales...

Sun Fun Kits 300HP or the 275EX seem to be very good with victron compatibility and some nice options like bluetooth, heaters, and active balancer: more batteries can be added by attaching a usb hub to the cerbo, in the sfk demo video they showed 4 batts attached. You could probably get a...

Batteryfinds ehh...😬

Interesting changes to the newer model: Looks like it now has Victron comms and active balancer control as well as manual heating. One of the guys locally just got 2 of the 275ex models so I'll have to check it out. Its priced exactly the same as the Epoch 300 ah with comms once you add shipping.

Well Sun Fun Kits now has 64 cell pallets of the rept in the USA, looks to be about 93.60 with standard bus bars and fibersheets and 94.63 with fiberglass and flexible bars. So they haven't really gone much lower since December. Same for 18650 they are about 99 with quantities over 48. Ezeal...

There is no justification for sanding off a QR code and relasering it to say something else. NONE. If they come with a B on it or are marred off then then leave them that way, don't try to change them into looking like something else. The debate on weather or not grade B are worth it or not is...

Rubbing alcohol or wax and grease remover (available in most auto body places or autozone) should work. The rubbing alcohol from walmart/target it takes a while to clean up you have to take your time with it and be careful. One of your images clearly shows signs of sanding already as you can...

One more thing that capacity sticker on the side, is the halmark of a grade B cell from a grade B testing farm: https://diysolarforum.com/threads/are-these-lf280k-how-many-amps-are-stock-bus-bars-rated-for.77248/post-987028

Ya they are screwing up... but I'm giving them legacy cred; if they don't change then I can't recommend them any more...

Not so fast champ, Those look re-lasered to me, they all look nice with the cover on them and then you remove the cover and clean with rubbing alcohol once you do you see proof of sanding re-lasering. You can read this thread...

Did you file a lot of disputes on Chinese sellers? I had this happen about a decade ago where my ex was charge back / return crazy and then our bank (hancock) would decline to process purchases from Kohls, Bed bath & beyond, and a few other places, also we got a letter saying they would not...

CATL does not have a DIY supply chain, only these vendors do (that I know): 1) RUIPI REPT 2) EVE 3) HITHIUM 4) WINSTON (hard to find) 5) Battero (Same as REPT again hard to find) 6) ETC (hard to find) There may be others but here are the ones that DO NOT have a DIY vendor supply chain: 1)...

You don't say, well than Battery Finds must be the first vendor ON EARTH that is selling grade A CATL cells because CATL does not sell to the DIY MARKET and only does OEM sales. Which is why all CATL cells on the market are either grade B, have been removed from existing packs, or have counter...

Not a fair comparison when you have Grade A cells with test reports from 18650 (Yes I know they aren't currently sending them....but they used to) vs Battery Finds who is selling grade B Catl Cells that probably have altered QR codes and no test reports. Hopefully you get good cells but you...