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What's going on here? Is this defective? I have a shunt, bms, even a cheap voltage readout display all showing the exact same voltages and this is off by .2... I have no voltage drop all the way from the battery to the charge controller either.

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!

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?

I bought a 4s 280ah battery cells plus bus bars from varicore/liitokalta store on aliexpress, it is on the way. If I order another one can I use them together to build a 24 volt 8s configuration or is that a bad idea?

Hi I am building out my 4wd astro van out as a mobile LTE office so I can work my remote job and ride mountain bikes out west all summer. I am in the planning stages and have only ordered thus far a 4s 12v varicore 280ah, which is delayed because of chinese new year. I am on the fence of...