I am planning to migrate from agm to lifepo batteries on my boat.
Current configuration is
640Ah battery bank
Feeders are two smart mppts 100/30 and 100/20, an inverter/charger 12/1600, an alternator 12/125.
Replacing all bank will cost alot as it will cause changing the alternator as well.
The question is about phase by phase replacement is possible by doing something like below.
Extract one agm battery.
Drop to 480ah.
Then put a seperate lifepo battery. Lets say a superpack 25.6/50
Disconnect solar mppts from agm bank.
Connect them to the new lifepo battery.
Place a new smart mppt 100/30 with max current setting 25A.
Connect new lifepo to the new mppt’s solar ports. And battery port to the old agm bank.
So working scenario is... Everything on the bot draws power from old agm bank. Lifepo will be the charger of that bank. Alternator and shorepower charging will also be avalable at old bank.
Is it possible that works fine? Or do you see any showstopper?
Thanks in advance,