If one is designing the entire propulsion system from scratch, one option is to break the 50v barrier and go to say 96V nominal, or higher. This could work well with LiFeP04 cells when a boat's current demands are modest but storage capacity requirements are significant and high capacity (the 400ah CALB cells, for instance) are not available. So rather than having parallel cells, the somewhat superior straight series configuration is possible. Really, it's all about the batteries. Rather than make the bank conform to the monitoring, charging, and control systems, make those systems conform to the optimal battery setup. Just thinking out loud. This should work well with FLA, for that matter. I have been mulling over this idea for a couple of weeks now, thinking about adding a motor to the existing diesel drive on a 44' Bruce Roberts that I should be closing on in a week or two.
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