- AGM or lithium ION batteries? It depends on the specific AGM and LION. Calculate predicted cycle life and cost per cycle to see what might work.
- Ability to fast charge the batteries. Both AGM and LION have outrageous charge acceptance rates, so much thought need to be applied here to come up with a high output charging system that can meet the use / need environment i.e. charge time plugged in or on the mooring.
- The above plays heavily into decisions that will need to be made about wind generators, solar panels, perhaps running a portable generator to charge the batteries. To do this right, you really need to honestly look at "a day in the life" for the boat before you just start throwing thousands of dollars at it.