I know the LifePO4 battery posts are quite frequent on here but I have a question that I don't think has been addressed in depth. As part of the Mercury Bulletin 2022-19R1 one of the requirements is:
  • Peak Charge Acceptance: 165A at 20-130 degrees F for one minute

When reviewing specs for LifePO4 cranking batteries very few of them actually show this as part of their specifications (Relion does but as I understand they are affiliated with Mercury). Another requirement on the bulletin is "Max Charge Alternator Size: 150A at 20-130 degrees F". It is common to see battery companies advertise "Max. Charge Current (Outboard Alternator)：150A" which I would interpret as meeting the Max Charge requirement.

Question: What is the difference between "Peak Charge Acceptance" and "Max Charge Alternator Size"? I called Mercury support and they don't know. I want to add a LifePO4 dual purpose battery to start my 150 Pro XS four stroke (2021), which is one of the approved motors, but need to understand the "Peak Charge Acceptance: 165A" requirement. Also, how many amps is the Pro XS 150hp capable of sending to a battery?