[Electric Boats] Pros and Cons of Lower Voltage

 

I am looking at a Mars motor that turns at a high RPM (2400@48v). The supplier suggests a gear reduction with a belt drive to decrease RPM at the prop. What are the drawbacks of just lowering the voltage to 24 rather than the extra hardware? It seems that there would be some inefficiency from the belt. How does this compare to less than maximum efficiency at 24 volts?

Thanks,
-jak

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