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JBD bms are the best. Built 3 12v batteries with them using an sunfunkits branded jbd and just recently tried a 8s version. JBD + active balancer is the most reliable combo and with the sfk buttons you can set it to only turn on the balancer when the battery is near full. There app lets you see...

Yes its worth it, I'm doing a small test 24v victron system myself and the cerbo comms are great IMO. If you didn't need comms why go with a victron at all. I'm using a sfk 24v kit 150ah 24 with comms. In regards to epoch only the 460 supports multiple batteries, the other essentials brand...

Very strange, but I will say I did replace the BMS from the Battle Born battery to a JBD BMS and was able to revive my bb100 battery. You could replace the BMS with a JBD 200 bms perhaps, it has a bluetooth you can unplug. sun fun kits uses these bms in there batteries but they have switch that...

I got there 275SE battery recently (not listed on there site but they will sell to you if you contact them) its a non heated battery with a 150 amp bms but still has cold temp protection and bluetooth as well as the comms to victron: It was $1,040 shipped and came with the data port and the non...

warranties on batteries is a myth IMO and epoch is run by 18650 who have really bad warranties and customer support so good luck to you. The epoch batteries are actually made by a company called RoyPow and they are owned by the EVE Cell Manufacturer so I would be surprised that you would need...

Before we see who is right or not, lets wait for the OP to do his investigation and then we can decide. For those wondering currentconnected carries CALB with test reports but they are very expensive.

The SOK is a great deal for a heated battery as its only $1000 shipped from there site and has heating, just not good if you are using it on a boat because its metal: https://www.us.sokbattery.com/product-page/12v-280ah-lithium-battery-built-in-heater-and-bluetooth The SFK is smaller in size...

I got my tracking number for my 48 pallet of 304 cells last Friday, its coming from Long Beach, CA to Arkansas and is supposed to arrive on the 19th. I ordered during the black Friday sale. The carrier is Saia Freight Lines. As for time so far its been about 70 days. If it delivers on Monday...

Well they have good prices but they are cutting corners everywhere, I guess if you wanted the cheapest possible go with them but expect same level of service as an aliexpress seller. From what I understand they are no longer sending test reports even with grade A cells. BTW you have some...

The only 150a cells that fit the SFK kits are the rept cells which I don't think they are selling, that or the eve 105, They are using 8 cells. I think you would end up doing a good bit of diy-ing to get there kits to work. They are good but like you said only for the 270-304 cells and maybe...

You only have 7 days to return a DOA product?

I am part of the JBD gang as well.

No they were grade B, but 18650batterstore said they are supposed to pull full capacity. They did not honor this, I ended up not even using these 4 cells and in the long run I probably saved a headache and now just get grade A cells.

I would recommend you look at the SOK 280 battery which has free shipping and is heated 280: https://www.us.sokbattery.com/product-page/12v-280ah-lithium-battery-built-in-heater-and-bluetooth they are $1000.00 with free shipping There are some advantages: 1) Its is fully serviceable including...

100% agree, a lot of forum people tell you its OK to grade B its just as good. TOTAL BS I bought 4 grade B cells and 1 was a turd, I refuse to believe I was so unlucky. No reality is most people never even test and just assume its all good and just ignore the truth.

Pretty sure JBD makes them, but there app will only work with the sfk devices, however, you can use the xiaoxing app or the overkillsolar app on the sfk devices. I think they have some changes to the firmware, the sfk app will not work with overkillsolar bms or standard jbd bms. One of the...

280K cells have the UL1973 certificates while the 304 have the UL2580. Would this make a difference?

Well looks like I have been summoned by rhino. What exactly do you want me to do here I don't have a JK BMS I have seplos in mason kits and jbd in my 12v. I'm not some SFK patsy, they have asked me repeatedly to keep them out of diysolarforum threads... No issues at all with SFK from my orders...

Where are you finding this information from, please provide some evidence.

18650batterystore has bad communication, only get grade A cells form them and avoid the grade B because you will not get any support.

What BMS does trophy use? If they have PC software you can look at the set for low temp charging, set it to the number you want and then it will probably switch the heaters on at the temperature you specify.

https://www.sunfunkits.com/product/135/48-cell-pallet-ruipi-rept-280-ah-international-warehouse $97.8/cell delivered with test reports, Looks like grade A finally broke the $100.00 delivered mark for 280 AH. Pity the MOQ is high. I'm wondering how low these will go, for a while all you heard...

Your math is a bit off the cells from Sunfunkits would be 5496.00 delivered from the international not $5596.00 so about $290.00 less than 18650batterystore, but I would be more concerned with the V3 with the double hole adapter are not using the octagon terminals and they test 10-14 ah less...

https://diysolarforum.com/threads/rant-about-ah-and-wh.59932/ I'm just going to say this: taking the Wh reading of your measurement and dividing it with the nominal voltage of the cell or battery is just wrong. Everyone I have asked said its Just Fine. Seems like a personal issue you have with...

Ok so I'm trying to understand how is using Wh being shady? According to upnorthandpersaul Wh is wrong and Ah should be used also 9/10 videos of capacity test I have seen are all using Ah. About 1 year ago I had 4x 280K cells form SFK and I built a battery it tested to 278.1 AH and 3601 WH with...

Playing devils advocate I tried to force chat GPT to make Ah the better measurement and it kept saying both have there place, but unlike WH it did not get to the Ah is better than Wh if you had to pick one despite my push to make Ah the better way...

I am very confused on this, and I will agree that SFK is the only company constantly says WH everyone else uses AH and so do many review videos. I called them today and they were upset with me on the phone saying I'm causing problems for them from Diy Solar Forum. Not my intentions but it is...

The qr code on the top cell looks very strange it has no code on it? Maybe angle. Like what the other folks have said I think you need to fully balance and charge these cells to 3.65v each and then do a test.

Looks like they are 2 versions of the 280K V3 1 with the EVE 2 hole adapter and the circular pads and ones with the octagon pads. Sfk says the octagon are testing higher but only about 10-12 ah.

He has an online YouTube channel and confirmed my results the cell was bad, he said he may do a video but I don't know.

Perfect example of the ridiculous double standard, Docan world famous for selling counterfeit sanded of Re-lasered QR codes are OK with you but SFK being mean to scammers is not. Good to know!

Well I asked Dwayne from SFK repeatedly to join Diysolarforum and they said the kicked him off in 2021 when he told people that Alibaba was selling grade B 99.99% of the time and unless you had a test report it was grade B. IF you are referring to 280K v1/V2 test they all test below 280, and...

Tim you seem to get super upset anytime SFK is mentioned are you worried 18650 might loose sales to them? Certainly seems like it. Please tell us about SFK's "shadyness" I have over 86 cells from them and have 48 more coming. Would you like to hear about 18650 shadyness? How about blatantly...

? $140/KW? $116.00/KW delivered to Arkansas no sales tax or anything else with bus bar and a .5mm fiberglass separator sheet. Sriko looks to be 100% grade B down to the little white capacity stickers which is the hallmark of grade B cells. Only Batteryhookup and Sun Fun Kits have the 1KW 280K...