First "powerwall" in ammo tin

I finally got enough cells in similar range to get going.
Average cell capacity is 1.93mah

I'm creating a 5s16p in an ammo tin that will have it's own BMS, just 2 wires to connect it to an external charger and/or load.

This will be one of many.

This will be great for my Ryobi tool set as well as the intended purpose of providing 12V power room by room at night, and charging from the main 24V LA system during the daytime, or when LA is at 100% charge only.

Below is the design model.

I have to disappoint you, it's not the first Still, carry on though and don't let it put you off it, it doesn't matter
I used to carry some LiFePO cells around back in the day when I was out in the field with my RC quad- and hexacopters. And it wasn't just me, many people did it like that. Today, years later, I still have the ammo box I've used but it's empty although I still have the LiFePO cells. I've recently though about reviving the box and fit some spare cells.

For your Ryobi tools, maybe you want to fit a buck-boost converter set to 21V. I plan to do something similar for my Ryobi fan to keep its speed up.

Cool... I have built a couple of them myself.

I am currently working on an (7s extended run-time pack) high capacity 3000 mah or greater cell density for a portable off-road fridge.

These types of smaller projects are generally pretty fun to me.