Why use a 3 output charger?

I have an IP-22 24/16 3 output charger.

I haven’t found much useful information on what the applications or reasons would be for a three output charger.

Consequently I have 12v AGM

Why wouldn’t one just run a combination of parallel and series to charge their battery Bank? Is there a limit per bank and this triples it? Is it for the option of having One Bank of agms and One Bank of lithium for example?

What are the different benefits or potential uses or limitations of the three output feature on the charger?

On boats you often have multiple battery banks.
One for normal loads, one for the engine and one for bow thruster for example.

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So one application is isolating different DC appliances by purpose to have the planned amount of reserve.

Since these are different outputs can different batteries be run from each.

For example. Series of 12v to equal 24v AGM on one, series of 4 6v to equal 24v on another and 24v lithium on the 3rd…

Or different brands/ages/conditions organized on each output to avoid diminishing the quality of the other batteries in each bank?

The three outputs are non-isolated, so must share a common negative return path, and all outputs follow the single programmed charge profile, so it would not be generally recommended to connect battery banks with differing chemistries to the outputs. In that case, it is better to use separate chargers for each chemistry being charged.