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No sure where to best post this. I bought my cells (52 x 272Ah Lishen) from Shenzen Basen on 31Dec20 DDP to France (98day delivery) USD 4691.00 DDP to France. . I'm happy enough with the 2 packs I had installed (remotely from Australia) with 24 cells each for 816AH x 24V nominal. Used...

No sure where to best post this. I bought my cells (52 x 272Ah Lishen) from Gloria at Shenzen Basen on 31Dec20 DDP to France (98day delivery) USD 4691.00 DDP to France. . I'm happy enough with the 2 packs I had installed (remotely from Australia) with 24 cells each for 816AH x 24V nominal. Used...

I bought 54 x Lishen 272AH Cells in Dec2020, arrived 7Apri21. All were good, no bulging. They were 're-wrapped' by Basen so I have my doubts as to being new ? I note now that they collect EU VAT with the order unless you provide VAT no for exemption. So called EU Polish stock still quotes...

Probably not the right thread, but I didnt go with springs in the end. Because I have an arrangement with 3 parallel cells x 8S , I wanted to use fixed busbars across the 3 cells. I used 5mm neoprene between all cells. 1 bar (14psi) compresses almost exactly 1/2 the neoprene. So my 4 rows of 6...

I found this thread very illuminating. I've bought 52 cells Lishen 272AH for 2 packs from Shezen Basen , ordered 21Dec20, delivered mid April to France (arrived in 2 sep lots). I paid AUD$100/cell (USD$70 approx inc shipment (and supposedly DDP so including VAT). USD $90 inc delivery. Mine...

I've now set the absorption and float volts to 29v, decided trying to deliberately taper charging using absorption v is too tricky. Also remember I'm charging at just 0.12C, not 1C like many of the tapering recommendations assume.

Finally have a few cycles of our 24 x Lishen 8S3P 272AH (816 AH x 24V) pack. Controlled by Electrodacus. On a barge in France. Shore Power and a Generator are initial charge sources. (we hide from the sun so solar not great investment). Unlike inline BMS's that cut charging or load, the...

You can get smaller units .. eg 100AH .. add 4 of those and a BMS, and you have a 12V 100AH approx 1.2kwH unit.. similar prices per kwH

I also purchased 52 Cells from Basen ship to France. They took 82days to arrive from order. The auto 'complete' fn of alibaba un-nerved me too and released my funds saying the order was complete after 60 days. I paid DDP and received no paperwork about VAT. But considering it was AUD$1000 for...

And like others have reported they seem slightly (?) different batches with some having the blue ring around the vent foil vrs most grey, and the number printed next to the OCR stamped on the top is obscured mostly by the top covers. I am very un-nerved about Basen doing their own pvc wrap...

The other 7 cartons arrived a week later.. in similar nick and condition. All appear physically OK, no obvious dents etc. Voltages all seem as per the labels attached and range over 52 cells from 3.257 to 3.268v. Starting the long slow process to top balance these ..

So all these discussions of Basen (and others ?) wrapping cells and mixing possibly vendors and the odd dented cells are being to make some sense why these are so cheap relative to others. But as for Grade A but not fully matched & binned.. What are they matching for ? Capacity within X %...

and 4 in parallel gives 400A max discharge and 200A charge.. so a reasonable config

To be clear on their pricing vrs raw LiFEPO4 cells. At AUD$1300 for a 300AH 12V unit thats $1.08 per raw AH 3.2V cell. DIY are available for AUD$110 for 280AH cells Lishen (from Basen) plus shipping. Shipping is approx $35/cell currently to AUS. Without shipping DIY is $0.39 /AH but with...

I ordered by 52 x Lishen 272AH cells from Basen on 23Dec20 and they shipped 30Dec. Just arrived in France .. but only 6 of the 13 cartons arrived. Have messaged Gloria. Feedback on shipping progress was totally crap. More than 1 month ago they were in "final port" awaiting customs clearance. I...

Fantastic, now that I see how you DIY your flexible busbars, I might revisit my decision to not go springs, for fear of movement of cells on fixed simple rigid 3 post busbar. I could make a 3 cell busbar in one with 2 flexi bits between allowing for movement. How many amps is that braided stuff...

I like the look of this. Its closest to my thoughts at this stage.. My complication is I'm doing a 24 cell , 24V pack as 4 rows of 6 cells. Since each 'triplet' needs busbars, the complication of allowing movement means more complex connections of the 3. As designed below with 20mm x 1mm...

Observations of voltage behaviour... I'm experimenting with some tiny 6AH LiFePO4 and Electrodacus SBMS0 with Heltec 5A Active Balancer too sometimes.. and a bench 5A supply. For these cells 5A is almost 1C rate. I did an initial top balance with all in parallel to 3.6V. Now in series as a...

One soln suggested is to set the Victron devices to a float voltage of 26.2 V , which is 3.275V/cell.. I hadnt thought about using the Victron charge profiles to deliberately 'override' the SBMS0's desire to charge till HVD. (3.55V) every day all day if Shorepower or solar present. 3.275V is...

I believe I also have a older Quattro with no AUX IO ports. Note the line the PDF linked to above "The Multi or Quattro needs to be of a recent type that has auxiliary inputs." Talking to Dacian, he confirms I need SSRs to switch off the ACIn1 and ACIn2 on a signal from EXT IO4. Thats what I...

From the Lishen 272AH Data Sheet.. (the batteries I have on order).. 5.4 Storage and Usage a) For any short time storage (in one month), cell should be in a clean and dry area （humidity ≤65% RH） and at -30℃ ~+45℃ at 20~40%SOC . b) For any long time storage (in 6 month), cell should be in a...

Thanks svetz for moving my post here.. I am considering disconnecting the batteries (and BMS) over winter. But I do need some 24V systems for safety (eg auto bilge pump). Also I prefer to monitor a security camera and weather station to know my boat (a 100 yo barge in France/BE/NL) is still...

I'm planning my first install on my boat soon. It will spend 6-9 months idle in European winter etc. Ive chosen the Electrodacus for my BMS. I am concerned that Daican doesnt not believe it harmful to keep the batteries at 100% over winter. There does not seem to be a easy way to get it to...

Sorry to open up this bit after such a delay, but I've reread these 'compression' threads from the beginning and are deeply interested in the best way to setup my 2 packs of 24 cells. I find the picture above very instructive. If a cell tries to expand when charged and is resisted by the case...

A late reply and partially mentioned in some responses but the gap shown appears due to a ridge on the cap preventing the cells being flat against each other. Its higher at the top, tapering to contact at the bottom.

Just to add to the source threads about compression being desired.. The Lishen 272AH product spec sheet , last line says "The cell thickness was tested at 3000N pressure." Which I believe is 3000/9.8 = 306 kgf for the side being 201 x 174 mm = 0.87kg/cm2 = 12.4 psi Thickness is quoted as...

Thanks all for some spirited and informative discussions around the various brands/packaging/size/price/reliability .. I find it worrying that the price/Wh from various sources varies so much (by factors of 3-6 times). The discussion of "matched" and "Grade A" in particular are interesting...

After ordering my cells (52 Lishen 272AH for 2 sets of 24 cells, with 4 spare), and a Heltec smart BMS 200A model for me to fiddle with, I've had cold feet on my plan to use this in my 'live' 2 installs. Reading more discussions of Mosfet vrs SSR vrs Relays for switching high currents etc and...

So I have ordered a Heltec 200Amp Smart BMS for delivery to me in Australia, to get some familiarity for it before I order 6 to got to France where my 52 x 272AH Lishen LiFEPO4 cells are going. https://www.aliexpress.com/item/1005001376655378.html?spm=2114.12010612.8148356.4.475a33a9Wh1Cip...

Hi Tialiden, I'm a first timer newb too so were both learning. Most of those in these forums will not be doing these things multiple times. The key part of the BMS sheet to read is "Adjustable Protection Parameters" and secondly there are 2 versions, one for LTO and one for LiFePO4. The LiFePO4...

So stuffs getting real now. I've just ordered 52 x Lishen 272AH 3.2V cells from Basen (via Gloria Luo) at US$71 each, ship DDP to France for $999. I'm doing 2 boats now with 24 cells 272AH for about 19kwH useable each. Mine and a mates. Luckily its all rail transfer to France, so hopefully no...

Thanks for your concise replies.. but "very close" and "not very long" are the 2 numbers I'm trying to quantify a bit. Is Q5 1 , 10 , 100 ma ? other ? Re step from 3.4 to 3.5 and then 3.6 .. are times similar ? Is it 1 min, 10mins, 100mins, 1000 mins ? Sorry if I'm being pedantic , just...

I've read many resources on Top Balancing, including Nordkyn Design series and the Marinehowto article. (mind you my mind is exploding with the LiFePO4 learning curve I'm on at present !). I'm just about to order 52 x 3.2V 272AH Lishen cells from Basen for 2 sets of 24 cells (3 x 8 Cells each...

Further to the issue of parallel strings. I plan to have 24 x 280AH Lishens on my boat (Victron MPPT and Quattro 5000/24). I was hoping to have 3 parallel strings of 8 Series 3.2V cells , each string with a BMS. 4 main reasons.. a) to have redundnancy so if one string is down I can operate...

I am looking at a 3 parallel Strings of 8 x 3.2V 280AH battery, I want redundancy so if one string fails I can still work. So I need 50A charging each string (100A total) and 110A discharg each string. Seems Daly Smart options jump from a 120A which supports 60A charging to a 300 Amp...