Some of you don't get it. Nearly NONE of these projects are engineered and built using NEW cells that were chosen to specifically meet the application. It is too cost-prohibitive.
Instead, most rely on un-vetted garbage. Or super-old random stock. As seen in the ops first pic. And then mash it all together with techniques gleened from manufacturers that use NEW stock and proper manufacturing techniques.
It is no different than the old days when an op would string together old used little 5ah agm's. All 100 in parallel with speaker wire.
Or the big boys stringing together a bunch of used car starter batteries found at the dump, and then asking us how to "improve" the system.
In other words, by starting out on the wrong foot, there is NOTHING to learn. Other than how to play with trash. And put ridiculous band-aids on trash, fooling yourself that you are learning.
Unless you start out with brand new cells, chosen specifically for the application at hand, all of this is pseudo-science, aka "milking the trash" for all it's worth.