Connection for house Lithium and Lead start

DIY
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Running a combined Lead and Lithium setup I have com across all these different setups for how to keep a lead start and thruster/winch setup and a lithium house bank.

Orange is cheap and protects back flow but is not recommended as a setup

Green, seen at some boat manufacturers setup but it seems excessive with two steps to get from alternator to the lithium.

Yellow simple but since Cyrix-li-ct does not prevent back flow or have an input side that controle closing the Lithium might end up overcharging the lead before disconnecting at 70-80%

Ping simple and you get the advantage of a boost controller to charge but limits the flow to just 50A unless more chargers are in parralell

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I am looking for arguments to why I should choose one over the other setup. So basically pros and cons of the different colored setups (or suggestions to setups I have missed).

Too keep the drawings siimple I kept a lot out of this picture including the shore power side and more.

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Pink is the only proper solution that has a proper charging profile for lithium and can independently stop the charge when they are full. The combining relays will continue to charge the lithium after if is full until the BMS disconnects.

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Why not use Green ?..
Cheaper than Pink.
What do you mean by “excessive using 2 steps” ?
Are you aware how many steps are in an Orion? :smile:

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I mean it like it is more devices that can fail.
Bigges potential issue with green is that you being both banks up in sync when charging. But green allowed for more current to flow. Biggest probelm with green I think is that the alternator will probably deliver less amp earlier leading to longer chargeup times. Thanks for more input