Lifepo4 battery in 1990 Lance?

Putting all loads and all charging at one common point when batteries are physically banked together in the same spot, makes for accurate tracking of power out, and power in/charge, having loads on different connections/batteries split system, makes it harder to correctly monitor power used,
While voltage system wide will generally reach low point equilibrium, voltage is not the best way to judge SOC/capacity level AmpHrs used or available