Some claim the Boondocker, eliminates some of the 80% - 100% capacity charging issues. I am going one better - A DPDT 120 vac relay with push-button activation.
Push 30 min, 60 min, 2 hours or 6 hours. Activates a 120vac power relay. The relay switches the conventional converter off, and at the same time switches a 36 amp Megawatt ON. When the timing cycle is completed, the absence of power releases the relay, and the converter cuts in.
The difference in charging between 14.4 volts and 14.8 volts is substantial for the final 10% of battery capacity.
Don't think that last 10% of capacity matters? Go argue with your sulfated battery, not me. The only time 14.4 volts is adequate is when generator run time is not an issue.