The discussion New Battery Recommendations (from 06/2024) revolves around battery replacement for a 26C boat. Michael Hoff is considering replacing his two Group 27 Deep Cycle 600 CCA flooded batteries, which are used interchangeably for starting and house use, due to their age and the fact that they never reach a full charge of 12 Volts. He has a Westerbeke 55A Alternator and is thinking of adding a solar panel. Michael Hoff asks two questions:
- If the Westerbeke 55A alternator is adequate to charge Deep Cycle 600 CCA flooded batteries with occasional 3-hour motor use and a solar panel.
- If 400 CCA batteries would maintain a better state of charge.
Mark Powers responds, agreeing that lithium batteries have advantages, but notes that lead acid batteries can be suitable if regularly fully charged with solar panels. He shares a link to the Marine How to site and mentions that small alternators can be burnt out trying to charge lithium batteries, and a regulator setup for lithium is recommended. Mark Powers suggests reading articles on “Easy LiFePo4 Conversion” and “Drop in LiFePo4 Batteries - Be An Educated Consumer” for more information.