10kWh LifePO4 DIY Battery Addition..... Here is my write up.

Where’d you get the copper paste

Hi Folks,

What are people using as the settings for their Neey?

I've 16s1p soon to be 16s2p

I should have said carbon not copper. Just needs to be conductive

https://ie.rs-online.com/web/p/greases/1247682?redirect-relevancy-data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

I tried moving the cells around, swapping the wiring looms from one set to another and always showed the low voltage on cell 1 and 2. Funnily enough I had also cleaned the terminals beforehand with very fine grit wet and dry paper. They looked great but it was like it put a film on them like a varnish

Does anyone have a wiring diagram )m(or can point me in the direction of one) for the battery to the inverter, isolator, fuses cable size, etc. trying to get my head around all that’s needed

I got come copper grease and went up today with a plan to disassemble, clean every connection and apply the grease and retighten everything to to recommended torque, but before doing that I decided to measure the voltage of various cells using a multimeter, and I see that there's quite a difference in voltage between different cells. Some are up at 3.6v, many at 3.58ish but a few at 3.33V. Turned on the Seplos too to see what it was reading, and it concurred within .02V of the multimeter readings.

Seems a big spread for cells that were connected in parallel and top balanced to 3.65 only a few days ago.

I suppose I should go ahead with the original plan or should I top balance again, disconnect all 32 cells and see if any drop off voltage quicker than others?

Nice one. I'm sure you'll be pleased with it. I had some on account credit with AliExpress and it was closing in on expiring, so I bought a 4S-8S JK BMS with it. About €80 and it is only 100A continuous and only 1A active balancing, but very handy to have as it can do both 12V and 24V setups. And it still has bluetooth and the very decent app. I connected it to my 4 spare CALB 200Ah cells about a week ago and set the balancing starting voltage to low and it has done a remarkable job on balancing the cells since then - they were in completely different states of charge when I hooked them up in 4S

I highly recommend Hankzor store as I had a couple of questions and issues over time and they came back to me quickly with answers. They know their stuff.

Still very happy with my main 200A 16S JK BMS too, it is doing a good job of protecting my big battery setup. But as with any BMS this side of $2k, I wouldn't trust what it reckons is the state of charge. That's above its paygrade really...

Anyone know what gauge wire the leads from the Jk BMS to the battery terminals are ?

Also are the bus bars supplied with the Nkon cells tinned copper or brass ?

So, not unexpectedly the dispute did not go my way. I have no 'Professional' test equipment. That was the last excuse in a long list of arguments. The dispute process is challenging. You only get 500 characters and can only reply to their reply. I messed up one shot by saying I didn't want to change my offer so the tool just resubmitted my original text. I didn't get to add any further information. Their answers were disingenuous. I have ordered new cells from NKON and I will now sell the 3 good and 1 bad cell. The good I believe are 180Ah+ and the bad around 120Ah. They'll be on Adverts in a day or so if anybody needs one or two to bring their pack up to scratch.

If the BMS is only 16mm2 is there any point wiring the battery to the BMS and from the BMS to the inverter in 75mm2 welding cable or will 35mm2 or even 16mm2 cable suffice, as the BMS will be the bottle neck.

i can get 35mm2 welding cable for €9.20/m does that seem reasonable ?

Yeah they are great even with 120Ah but I only have a compressor fridge and that consumes 20-30Ah a day :( The solar panel is covered a lot these days with kayaks so not much help! So a long weekend without movement is problematic especially in Winter. That and the fact I can now run a toaster and want to be able to charge 2 ebikes at least once makes 120Ah too small for me. The build experience was good to do and I feel more confident now and will probably make a 16s1 later in the year.

For anyone thinking of selling their CALBs and going EVE cells, I'm in the market for buying 5-6 more CALB 200Ah cells (or more). Preferably capacity tested with at least 140Ah, but anything considered, PM me!

16). Catl 302ah batteries from NKon for €2322 delivered.

currently out of stock but due back in a week. I’m thinking of ordering these. How does the price compare to others available. Any issues with this type of cell.