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Exactly the same setup as OP. 24v 8 cells in series.

You could do an 8s bms and have the balance wires run between the boxes, even add plugs between them.

First bottom support printed, fits like a glove stiff as a board.

I'm going to let the seller respond, then try Ali, then CC. My CC is pretty good about this kind of stuff so I'll probably win. I have decent documentation. I think my cells are going to end up usable either way.

I ended up putting double stacked 1/8" aluminum flat stock and it is solid as a rock. I completely overbuilt this electrical system it never goes below 90%, but I have yet to run a laptop all day and watch TV at night, it's just a weekender out in colorado right now. I will post some...

Looks good. Any suggestions on quality copper bar for this application? under a bed in a camper van avoids this :) My friend who is running this job for me on his printer is much more experienced with PLA, which is another reason I went with PLA. My second batch of cells arrive on Friday...

heap64 did this for 24v 8s battery and it could be used to make a 12v as well. I printed one and made my own 24v battery, it's pretty slick

Assembled

Still printing a couple more pieces before I can do the full 8s build. Several printing issues as well as an entire printer failing put my filament cost over $150, but the result is looking promising.

So I messed up my copper bar sourcing. Not surprising as I ordered components to assemble before the printing was really under way fully. I ordered pre cut bars from Midwest steel and aluminum and did not account for additional length to cross over to the next rank of cells. The required minimum...

On Will's video where he links them as a supplier he indicated he was shipped new cells which were top balanced from the factory. I think they shipped him something different than the subsequent orders they sent out.

Is it wide enough to do it laying down? You might be able to print them in 2 interlocking pieces but then I would want 8 allthread clamping per side

Every other meter and device I gave disagrees with the MPPT and agrees with the Klein though. But either way overcharging my li bank by 0.2v regularly that should be fine I suppose. I have a shunt BMS 2 meters and inverter all from different manufacturers reading 26.6...

Interesting, thank you for your input.

https://www.renogy.com/rover-li-40-amp-mppt-solar-charge-controller/ This MPPT has a temp sensor port. The manual states that you should not use the temp sensor with lithium battereis but does not explain why. Does this not have low temp shutoff?

Well I'm going to do it so I guess we'll see!!

To me it just doesn't look as nice, and the 110 custom cut flat stock are like $3 each. I am confident properly done copper tubing bus bars would work fine. I would even use the bus bars that came with my cells if they fit this housing but they are too short.

https://www.ebay.com/itm/DIY-12-Volt-280Ah-Empty-Battery-Box-Case-Will-Fit-Large-Battery-Cells/133688747193 Ships out of phoenix. Anyone tried them? If you do buy them because of this post (looks like quantity is limited) please report back here with a review and pics!

Have you had any issues with that longer bus bar heating up? I'm capacity testing right now and that bus bar is a few degrees above ambient and voltage is slightly low on those two cells I think due to resistance. My spacers are stainless steel washers stacked up. They cover the entire surface...

Excellent, this answers my question. Thank you!!

No there's a long bus bar that crosses over I just haven't cut it or drilled it yet. You can see it sitting there on the right. I am running my system 24 volt.

He said top balanced go watch the video and argue with him in the comments if you want my dude. I knew what he meant.

I am doing something similar. I haven I am doing something similar. I haven't put it together yet but I think the regular caps will clear.

If you look around, options are limited, and this one looks solid. The only other options are RV snap top boxes that are super flimsy.

I watched the video again, I think I got them mixed up with another video/source. Regardless, the cells they shipped him look brand new, mine are all scratched to crap. The aliexpress description definitely says "New and original". I am ok with some terminals scratches but these are effed up.

I am printing top/bottom support housing from thingverse that another forum member created. They fit so far. Pretty excited for the final build.

I got 8 280ah Lishen from them and the physical quality is low. They are B grade at best maybe used. 3 of 8 cells bloated, various SOC, abrasion on the blue coating, 3 with dents, 1 with severe dent at the top. They're usable but they are advertised as new and original so I am attempting to...

What are the recommended width and thickness bus bars for this box? I just ordered 4kg PLA to start on this.

PLA from matterhackers. I haven't printed a top cap yet. Glad it's working for you now!

I am going with no, we'll see how they treat me on the partial refund. So far I am getting some "this is normal" type responses, which does not inspire confidence. They are claiming it was damaged in shipping already. The problem with this theory is the box I received the cells in is pristine...