two type chargers connected to one battery

westend wrote:

Chuck_thehammer wrote:
use 2 pole double throw power switches.. one or the other ..

NEVER Both at the same time... not designed for it..

if one is set at 13.5 and another is set at 13.7.. where do you think the difference will go.. into the lower voltage one and burn it up..

chargers put OUT and Never accept "IN"... and this is what will happen.

my opinion.

This is not how the two would operate together. Both chargers will start to push less amperage as the stored current in the battery increases or as current is supplied by an added charger. Since battery chargers are usually capacitor coupled and diode protected at the output, it is nearly impossible to "burn it up" with another charger. If it was possible, every time a charger was connected to a battery with higher voltage or current stored, the charger would fail. That is not the case.

For controlling the chargers, if the OP had a box with two AC switches, one marked "boost" and the other "float", it may be the most intuitive arrangement.