How would you connect the wires, Can you help?

[NBs]

Hi All!

Intended to replace 4*6V 230A AGM batteries 2*280A lifepo4 "drop in".

I have purchased an srne DC-DC 50A charger / mppt regulator.
https://www.srnesolar.com/productdetail/42.html

And new AC-DC 40A charger. The intention would be to leave the old AC-DC charger to serve the bow thruster and starter battery banks

Attached is a picture of battery management now.

ARC battery link is blue sea 7600
https://www.bluesea.com/products/old/7600

Start solenoid is blue sea PN9012
Åhttps://www.bluesea.com/products/901..._-_250A_12_24V

Parael arc is blue sea 9112
https://d2pyqm2yd3fw2i.cloudfront.ne...tions/6693.pdf

How would you connect the wires, Can you help? (I know I would need a professional, but the money situation now doesn't allow this, so I'll have to do it myself.)

Best regard
NBs

[Tin Tin]

I would insert a DC DC charger between engine battery and house bank and another DC DC charger between house bank and thruster battery. That way the alternator is protected and the thruster battery will be charged by the house bank and its charging sources and the mix of battery chemistry is isolated. That way you only need one AC charger.