Here is a little 60V / 60 Ah Custom Designed Motorcycle Battery I designed. It might give you some valuable information as it is done in real scale and based on the LiFeBATT 40138 Cells. Should help you think about your particular configuration. The Battery Weight would be 87 lbs. Battery box would be a DIY project for sure. Cell cost approx. $ 3,000.00.
Best Regards,
Don Harmon
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