Mostly all you need is a wiring harness that brings the plugs to a small acess hatch. This will work with or without the hvc lvc boards.
Then you plug in several RC chargers, one big RC charger, or a bulk charger depending on your choice of charging method.
Have you even looked at ways to handle 12s? most of them are stupidly simple. It's 20s 24s etc that gets really complicated.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.