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  • Post in thread: Cheap LF280k battery box from Luyuan

    Bought a battery box from Luyuan after arranging everything with Amy. Scattered notes: . Amy is an excellent communicator; . 45 day shipping deadline from China to Europe was not met ( I think that it took 10 more days) . Box looks fantastic!!! . Quality seems top notch . Customization was...
  • Post in thread: Cheap LF280k battery box from Luyuan

    Some pics
  • Post in thread: Cheap LF280k battery box from Luyuan

    some more...
  • Post in thread: Need EVE 280K Batteries: Luyuan? Qso? Docan? Other Companies?

    From your list, I would buy only from Luyuan - consistently a good supplier. Expect a delay on top of their claimed timings (+15 days in my case). Would buy again (battery box in my case), but would also buy cells. Search for Docan here in the forum... yes..., YouTubers have more luck than...
  • Post in thread: Hankzor JK BMS with screen and power button

    Unexpected, awesome response. Maybe a cheaper/ just for emergencies / backup BMS will be in the spare's bin, then...
  • Post in thread: Cheap LF280k battery box from Luyuan

    Yes, the screen cut out was slightly pushed in. As I won't have one, I'll push it back to its original place. M6? I guess so. Those are the LF280k v2, A grade.
  • Post in thread: JK 4S 200A BMS

    Thanks a lot!! Totally understood! It's incredible how included instructions don't pair up with the product , not even the marketing material... it's only good people like you and the ones in the forum that make all this work. Again, thanks!
  • Post in thread: Compression orientation & SOC level when tightening

    Compression is described in the cell's datasheet. (pressure, method, materials, SOC) As I don't have the equipment to measure the correct compression at the given SOC in a fixed fixture, I'll go with springs, which are rated for a given force.
  • Post in thread: Victron compatible LiFePO4 BMS

    Hi! I'm extremely interested in your setup. Thanks for sharing!! I'm also after a 150A - 200A BMS that could talk with the Victron MultiPlus-II 24/5000/120-50 / Venus OS. I need to buy one or two of such BMSs as I'm waiting for 8x LF280K for a 24v battery, and after this I'll make another one...
  • Post in thread: LiFePo4 for a sailboat

    Being in mainland Europe I'd only buy from NKON or Amy at Luyuan. The first due to warranty and good, consistent feedback, the later for price and feedback. Amy seems to have some interesting battery boxes, though I would check if they properly compress cells
  • Post in thread: Victron VenusOS driver for serial connected BMS - JBD / Daly / ANT / JKBMS / Heltec / Renogy / Tian / ECS

    Thanks for your prompt and lengthy reply! You provided a lot of added value!!
  • Post in thread: Victron compatible LiFePO4 BMS

    Regarding the Seplos, there is an ongoing thread on it and clearly talks to Vitron, though at buying time you have to specify that (there are 2 versions, only one works with it). It seems it doesn't publish DVCC, though
  • Post in thread: DIY LiFePO4 Cost Analysis - The Cheap November 2023 European Edition

    Once again, thanks for your view on the subject! In order to be comparable, I think that a breaker and a battery box is mandatory. We want similar end results. I'm having second thoughts about using B Grade instead of A grade, as that is what I would expect inside SOK's batteries. Again, there...
  • Post in thread: DIY LiFePO4 Cost Analysis - The Cheap November 2023 European Edition

    Agreed!!
  • Post in thread: Building a 24 V battery bank: Using 12V batteries is much cheaper, but is it worth it over using 24V batteries?

    For the cells, you also have NKON in Europe. Quite reputable. LF280k v3 currently at 110€
  • Post in thread: Building a 24 V battery bank: Using 12V batteries is much cheaper, but is it worth it over using 24V batteries?

    Be aware that DIY may present some difficulties, namely when components get a bit stubborn (like a BMS, for example).
  • Post in thread: Cheap LF280k battery box from Luyuan

    Hi. Due to work commitments, I was unable to finish assembly. But I'm very satisfied with it!
  • Post in thread: Server Rack Battery vs DIY

    Thank you very much for the detailed information. I'll cross your breakers' reference # and confirm that they are all non polarized, as those prices seem quite interesting. Again, thanks!!
  • Post in thread: Breaker for Battery bank

    Awesome response! Thank you so much!
  • Post in thread: [PSA] Make sure to properly prepare your connections to aluminium terminal posts in order to ensure low contact resistance.

    Thank you very much for your detailed response! Regards!!
  • Post in thread: Cheap LF280k battery box from Luyuan

    Price, DDT DDP (at my door, all duties paid): $248 Edited: DDT should have been DDP
  • Post in thread: Help us design a rack-mounted system for the UK

    I'm thinking on Luyuan's, that is around that price point, delivered. I'm about to get 2 of those, but if something more... interesting/ cheap / better specced appears, I may in for that...
  • Post in thread: Compress or not, flexible busbar or not

    The specification is for 10mm:
  • Post in thread: Feedback regarding Docan Power plastic box for DIY LiFePO4 battery builds

    Just for newbies future reference, don't forget that EVE (and also CATL??) recommended cells to be compressed in order to achieve declared longevity (cycles) in their spec sheet
  • Post in thread: Brand new EVE (Grade A) LF280k from NKON arrived (made August 2022)

    I paid 183.55€ each, plus a total of 47.81€ for shipping, which will equate to (for 8 units) around 190€each. They always sell the next "Grade A" shipment even before they receive! it. NKON sells mainly in Europe https://eu.nkon.nl/rechargeable/lifepo4/prismatisch.html
  • Post in thread: Our NEW GO-TO LiFePO4 vendor...09.20.21

    Thanks for a proper good laugh!
  • Post in thread: usb-c Power Delivery Panel Mounting [laptops]: Why is there not much postings?

    Thanks for reporting on it!
  • Post in thread: Power useage when JK turned off.

    IRC I read reports stating fron around 200mW to 600mW depending on model and HW version
  • Post in thread: Cheap LF280k battery box from Luyuan

    This particular battery box holds 8 cells. I also noticed that they made a mistake in the ad as at least once they refer to 48v and 16 cells setup, but it may have been an editing issue (copy - paste). As you'll have to write Amy in the chat to customise the box to your needs, all details will...
  • Post in thread: Inexpensive 20Ah lifepo4 battery by Moseworth: pretty good!

    Thanks for the review Link?
  • Post in thread: [PSA] Make sure to properly prepare your connections to aluminium terminal posts in order to ensure low contact resistance.

    Sorry for resurrecting this thread... but I still have some doubts related to it: If I use these cells (EVE LF280k with double terminals) with an alu busbar - with the double of the original busbar size (don't know which alu type, tbh) - there should be no worries with dissimilar metals...
  • Post in thread: Poor Docan Experience (Resolved)

    Wouldn't think twice...
  • Post in thread: Metal used for Compression

    Hi! I'm very interested in your setup. Could you please share some photos? Thanks!!
  • Post in thread: Another Cell Compression Thread, this time about foam

    Please read your's cells datasheet. Most probably if needed, it's described there. For EVE 280k it's described as 3 rods each side, 10mm alu or wood (?), compressing on the larger side - IIRC
  • Post in thread: Brand new EVE (Grade A) LF280k from NKON arrived (made August 2022)

  • Post in thread: Brand new EVE (Grade A) LF280k from NKON arrived (made August 2022)

  • Post in thread: Newbie

    Howdy. Just beggining with lithium - hence been lurking in the forum reading as much as I can - though with some previous DIY experience on solar, just for fun. Been quite a learning experience around here!
  • Post in thread: Server Rack Battery vs DIY

    As I,'m in the process of accessing a new set of cells, could you please share the brand and source for yours? Thanks in advance
  • Post in thread: JK 4S 200A BMS

    I remember your tests, and I understand quite clearly your description, as I have used this arrangement for other purposes in the past, but... I'm not understanding JK's instructions on the heating pad! :( I've just received a brand new JK-B2A8S20P-H AliExpress instructions: Provided cable...
  • Post in thread: QR Tag Conflicts - EVE & CATL

    These are my own Grade A bought from a reputable company (famous last words) You can use it to check if you find any differences from yours. If you need better pics, let me know Thread
  • Post in thread: Finished Our 4th RV Solar Installation

    Nice!! What have you used to make the schematic? I'm starting drawing my setup, but I'm finding difficult to get the Victron components in a software that can make nice diagrams like the one you have...
  • Post in thread: Victron compatible LiFePO4 BMS

    Just found it. https://diysolarforum.com/threads/seplos-can-bus-rs485-48v-200a-8s-16s-bms.20051 It's buried somewhere in the 40 page thread!! :censored:
  • Post in thread: CATL 202ah - new supplier, potential problem

    If they're supposed to be "A Grade", brand new, than it's not your problem. Something is wrong. Compare to advertising pics and if different get all your money back
  • Post in thread: Anybody tried new JK BMS with inverter communication support?

    Another (quite cheaper) idea could be Luyuan's. I've ordered one, but haven't received it yet, so I can't comment on the quality . It's customised for cells and BMS
  • Post in thread: Need EVE 280K Batteries: Luyuan? Qso? Docan? Other Companies?

    Never heard otherwise.
  • Post in thread: 12v and 24v sharing negative bus bar

    Hi. Though I searched the forum, I was not able to find an answer for this: In a van setup, fitted with a 12v electrical system, can I have a 24v house system with chassis as common ground? (no, it will not be the only ground!) Van: Ducato / Promaster / Jumper / Relay (they are all the same -...
  • Post in thread: Bluetooth BMS' and using an "Android PC" for monitoring.

    Hi Steve! I know you don't have Victron gear. But with the VenusOS you get a pretty nice interface/ central console. I have not explored it myself, I'm about to, but what I see is an easy way to present all batteries to a nice GUI, easily accessible from anywhere through VRM / web. Regards
  • Post in thread: Compress or not, flexible busbar or not

    Thanks for your input!!
  • Post in thread: EVE LF280k Vs 304

    Thanks for your input. I really don't need 280ah with a second battery bank. 2x 24v 200(ish)ah would be enough
  • Post in thread: EVE LF280k Vs 304

    Thanks for your lengthy response! If you were buying cells right now, which cells (vendor?) would you bet? (in my case, it's for a mobile application - campervan)
  • Post in thread: Breaker for Battery bank

    Thanks for your input! I really like SE, and being in Europe that's easier to source. I'll try to see if I can get their support.
  • Post in thread: Blade type LiFePo4 from BYD

    Hi! I don't understand the type of terminals they have. How do you connect them?
  • Post in thread: MCB - van conversion

    I'm also very interested in the responses...
  • Post in thread: Multi meter recommendation : on the cheap side

    Hi. My current multi meter only reads 2 decimal places in DC current. Not the best for LiFePo4 cells... As such I need a new multi meter, preferably quite reliable, and on the cheap(ish) side. yeah... I checked a Fluke just for fun, and got quite scared with the 1k price tag So, requirements...
  • Post in thread: EVE LF280k Vs 304

    Considering just "Grade A" cells (whatever that really means) from NKON or Luyuan, why choose one over the other? (no horror stories, just facts, please, like # of cycles, costs, etc) Thinking about a second battery bank (first being LF280k, still not assembled) for mobile application...
  • Post in thread: Our NEW GO-TO LiFePO4 vendor...09.20.21

    Thank you very much for your description! I don't know much about pressure, pressure distribution among several pressure sources (double the number of springs means half the pressure each spring needs to produce for a constant pressure, or is it non linear?), pressure change along spring...
  • Post in thread: Breaker for Battery bank

    Regarding the SE 865-DCBRK-250, I was not able to find any info if it is or not polarized, and as such if it's usable in a battery bank as a disconnect switch (under load). (Use case in 160 max amps.) Where can I get that info? Thanks in advance!
  • Post in thread: Our NEW GO-TO LiFePO4 vendor...09.20.21

    Hi! Could you please send me a link to the springs you used in your fixture? The picture's right battery seems to show them almost bottoming out, or is it just the photo's angle? Thanks in advance
  • Post in thread: Which JK-BMS version? CANBUS or Heat?

    Watching out of curiosity of JK BMSs and communication with Victron...
  • Post in thread: Best 280-304 to buy right now?

    Thanks! The top right Orion... is it for 24v to 12v conversation? I was meant to also use 2 Orion for 12v to 24v but you got me thinking...
  • Post in thread: Disappointing EVE 280K Results

    Slightly off topic: Which tester is this? Thanks
  • Post in thread: LiFePo4 for a sailboat

    I don't recommend any BMS, though I bought JK for dual 24v battery bank
  • Post in thread: EVE LF280k Vs 304

    Thanks, @Alkaline , your response is appreciated as I know you've been tracking quite a few buyers. More food for thought... I didn't though about the LF230, but as I'll have plenty of capacity with the new battery, maybe that could also be a possibility. So now it's LF280k Vs 304 Vs LF230...
  • Post in thread: Building a 24 V battery bank: Using 12V batteries is much cheaper, but is it worth it over using 24V batteries?

    Why did you choose that over having redundancy?
  • Post in thread: Multi meter recommendation : on the cheap side

    Many thanks for your suggestions and thoroughly description. I'll investigate the units you mentioned. Forgot to say that being easy to buy in EU was a bonus. Again, thanks for your reply!
  • Post in thread: JK BMS Current Consumption (JK-B2A8S20P-H)

    Hi! How much is your box insulated, what kind of ambient temperature are they subject to and what type of cells are they? Is overheating an issue with your setup? I'm about to build a 24v battery based on 280Ah Eve cells for an RV, and I'm thinking about putting them in a metal box to prevent...
  • Post in thread: Diy battery voltage increase

    Another alternative is upgrading your DIY 48v battery to 96v, but that's a totally different game...
  • Post in thread: Disappointing EVE 280K Results

    You agree on something. You pay the price in full. You receive a portion of what has been agreed. Until new agreement is achieved, someone should be pi$$ed...
  • Post in thread: Compress or not, flexible busbar or not

    Bonjour @oliagri Thanks for this table. I'm not fully understanding it: a) what is the unit of measure inside the tables? kgf? N? b) I can't understand how a bigger spring is able to produce less force c) what is the compression at which it will reach the maximum specified force Do you have...
  • Post in thread: Multi meter recommendation : on the cheap side

    Or online without outrageous shipping / tax costs
  • Post in thread: Compression analysis for various configurations

    So why would they start at 30-40% with a given compression? Why bother with a given compression apparatus? (they have the schematics there) I would believe that they make testing under optimal conditions so they can brag about the product and it's cycle / capacity results...
  • Post in thread: Compress or not, flexible busbar or not

    2x 8 cells is at least 90kg Will it be moved from the place where it will be built?
  • Post in thread: Necessity of a Pre-Charge Resistor

    Thanks for all your info. Having just bought a MultiPlus-II 24/5000/120-50, and seeing people on the web using such procedure, I'm right now trying to also understand why, and how. How do you know your Multiplus is charged? Voltage comparation? How one do it manually?
  • Post in thread: EVE LF280k Vs 304

    Thanks for reporting. Were those A Grade (dual bolt terminal) or advertised as such? Where were they bought from? Thanks in advance!
  • Post in thread: DIY Busbar

    Hi. I'm about to build a battery (24v, 8x EVE LF280k, 200A BMS) to be used in a Class B RV (max 130A draw). I'm thinking about putting the cells and BMS inside a metal box (in the garage, also properly insulated) to mitigate fire risk, but I'm fearing overheating could be prejudicial. What is...
  • Post in thread: Paralleling different capacities - at cell level or pack level?

    Hi Be careful in the reconnection moment. If you don't want to have huge current inrush, both batteries should be at the same SOC. And this is one of the reasons why a Class-T fuse is (almost) mandatory
  • Post in thread: [PSA] Make sure to properly prepare your connections to aluminium terminal posts in order to ensure low contact resistance.

    Thanks for the lengthy reply. Given the cells I'm waiting for, It seems that using an alu busbar is preferable. Do you agree? Thanks for your opinion!
  • Post in thread: Compress or not, flexible busbar or not

    Even if the num of cells, or exact force they produce at a given compression is not accurate, the math there teaches me how to work out my own scenario. Thanks!
  • Post in thread: DIY Busbar

    Same question to @Bob B , how are you dealing with these risks...
  • Post in thread: Rack mounted enclosure for prismatic cells

    Has anyone tried Luyuan's battery box, either this or the 24v (8s) version? Thanks in advance!
  • Post in thread: What 282 kWh CATL LFP look like

    Thanks for sharing! What a beauty!!
  • Post in thread: Help us design a rack-mounted system for the UK

    Now that this one is done, any chance on a 24v 280k / 304 battery box for DIYers ?
  • Post in thread: Choosing flexible busbars

    Looking forward for your experiences in the braided busbars! What is the max amperage they handle?
  • Post in thread: Victron compatible LiFePO4 BMS

    Awesome having your feedback! I was reading through the thread's 19 pages, but haven't reached the end... I'm between JBD and JK ( especially the latter due to the active balancing features) so I'm interested in your experience... Was it easy to setup? Does the GX uses DVCC? Thanks in advance!
  • Post in thread: JK 4S 200A BMS

    Hi! Still reading as much as I can on Fast Acting Class T fuses as I'm about to start building my first LiFePo4 battery (24v, 280ah cells). Could you please point me to the fuses and fuse holders that you're using (with success ) in your setup? Or are they really created equally, unlike most...
  • Post in thread: Calculating power loss via YR1030+

    Thank you so much for your responses, not only here but all over the forum. Most, I just grasp the concepts, some I fully understand, but I always learn. Again, thanks!
  • Post in thread: DC Circuit Breaker for Hybrid Inverter

    Hi. I'm trying to learn as much as possible regarding DC load protection. I didn't understand your remarks regarding the symbols and this switch. Where is the marking? Does this means it cannot be used in a 24v LiFePO4 system under load? (max 160A in my case) Thanks in advance!
  • Post in thread: DC Circuit Breaker for Hybrid Inverter

    Damm Just noticed hgg's remarks regarding the manual! Dah...
  • Post in thread: Victron compatible LiFePO4 BMS

    Maybe those are questions to these thread? https://diysolarforum.com/threads/victron-venusos-driver-for-serial-connected-bms-llt-jbd-daly-smart-ant-jkbms-heltec-renogy.17847/
  • Post in thread: DC Circuit Breaker for Hybrid Inverter

    ,Hi. Could you please point me to where the voltage drop in this switch is mentioned? (I'm reading this in my mobile, I probably missed it) Thanks
  • Post in thread: Brand new EVE (Grade A) LF280k from NKON arrived (made August 2022)

    Hi. Due to time constraints on my side I was unable to do any cell related testing
  • Post in thread: Is it okay to add a t class fuse after a 60v 200amp breaker from battery to inverter

    Sorry for the ignorance, but shouldn't fuses be placed as near as possible to the source / battery? The way you described, the circuit from the battery to the fuse is not protected , right?
  • Post in thread: Hankzor JK BMS with screen and power button

    @Nami ?? I'm about to buy BMSs for my long term living RV. How can one trust this types of batteries for an RV?? One cannot afford to be hung without any power so easily!! What have others done to prevent this??
  • Post in thread: Choosing flexible busbars

    Interesting topic. Another important aspect is the hability to be able to drill and tap a hole to join BMS cables
  • Post in thread: [PSA] Make sure to properly prepare your connections to aluminium terminal posts in order to ensure low contact resistance.

    Thanks! Dammm I was not expecting that... Trying to learn as much as possible... why do you think that? "strange" form factor? other? Regards
  • Post in thread: Compression analysis for various configurations

    Very interesting post!! Thanks for sharing! Please remember that what is in the spec sheet is 3 rods per side, which is ignored by most builders. That will allow a much spread load... Regards!
  • Post in thread: Multi meter recommendation : on the cheap side

    Thank you very much for your suggestions. I ended buying the ANENG AN870 (due to cost considerations) and the UNI-T UT210E. Again, thanks for your support
  • Post in thread: Would you consider this Chinese battery isolator / disconnect / combiner ?

    Setup: - 24v - 2 batteries (8x 280Ah) - max consumption 160A (from both batteries) Would you consider this 4 position rotary switch for your campervan? (to be used as disconnect, or battery switcher, if maintenance needs arise) I know that it's not the one in the forum documentation, but it...
  • Post in thread: 48V Disconnect

    Sorry for the slight thread highjack, but what would you recommend as a 24v LiFePO4 battery disconnect? Thanks in advance!
  • Post in thread: Enclosure for 24v DIY battery.

    Also interested in this, would like to see what appears here with compression as described by EVE for their LF280k

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