My plan for the pack is x32 Eve 280 or 304 3.2v cells - x2 16-cell series run parallel as a single pack, so roughly 600 amp hours @ 48v (28.8 kw hours) shared by the two motors. Our house bank is x3 12v 300 amp hour LifeP04 batteries, so they'll just continue being what they are. More than necessary if I was starting from scratch, but nice insurance if I should have any issues with the pack/charging/motor system - our house bank will still be plenty big while we sort it out and still chargeable by our generator to our house inverter/charger. We live aboard full time, so that's a pretty good thing to have in the hip pocket. I came to the same conclusion that you just said regarding charge sources just after posting that question with just a little research. I'll probably divide our solar into 3 banks with 3 MPPT's and I think we can afford to get about 2000- 2500 watts up there. FWIW, we also are running Autoprop feathering props. They're not in perfect shape, but I think I can rehab them to be pretty solid. I was considering swapping them with new fixed props, but it would be nice to have the flexibility of being able to change prop pitch to dial in our speed/efficiency. The "formula" to figure out what gear reduction we need seems a little ethereal to me, since it hinges on hull speed, which is pretty tough to accurately determine in reality, no matter how many numbers you throw at it. I realize that, at max motor RPM, you want to get your prop speed to spin at the exact speed to theoretically achieve your boats hull speed. But on a boat like ours, that's probably 9+ knots, which seems a ridiculous target. I don't want to burn the kind of juice that would take even if it's possible. Lol. So wouldn't it be better to optimize the reduction for something more in line with real world cruising speeds? Or am I overthinking that too?
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