Every motorhome on the market would FRY the electronics if voltage surged to sixteen volts, any time, any where.
I read the description in the link and it gives zero justification as to why voltage would surge in an automotive circuit. Load dump occurs when a substantial load is utterly cut off. If the Gizmo is connected closer than the break in the load path, say goodbye to the gizmo.
Voltage charge control higher than vehicle ECU regulates at puts at risk the higher voltage battery because the ECU voltage amplified may have an entirely different control curve.
Constant undervoltage means constant undercharging. Something lithium is supposed to utterly ignore without shortening cycle life. What about over current protection? For both the Gizmo and the batteries.
AGM tolerates 14.4 volts very well and I know of no OEM charging system that maintains voltage to even 14.40
Unless system voltage differential is .5 higher than the other bank this is an uneeded piece of bank account vitamins for the manufacturer.
The main problem I see today is an OEM charging system that disagrees with the auxilliary battery voltage. Then a DC/DC charger may be needed especially on marine units, but marine charge control wasn't designed by idiots like automotive systems.
You tell me.....
