[pmousso1]

Converting my 2013 BBB 72V Recoil to LiFePo4 battery setup, Have a 72V AC induction motor with a 300amp AC controller. Limited to 30HP (22.4kW peak). Not surehow to determine the minimum or optimal ah for this 72V system. For example, do I require 280ah or 200ah or 100ah to achieve performance comparable to the original 72V lead acid system (six 12v batteries connected in seried).

If the question is silly, pardon my ignorance as I am just begun learning. TX

 

[pmousso1]

There's nothing silly about the question.

Automotive lithium-ion batteries can routinely handle about 3 A of discharge for each Ah of capacity, and even more very briefly, so to handle about 300 A of discharge you would need about 100 Ah of capacity. More wouldn't hurt, of course.

100 Ah @ 72 V would be 7.2 kWh. That sounds reasonable for a golf cart, although of course this style of "golf cart" isn't typically used for golf, and capacity depends on how it is used. Again, more capacity is good.

For those who didn't recognize "BBB Recoil", that's the Recoil model of the Bad Boy Buggies line, which is (or was) part of the E-Z-Go division of Textron. Stock, it appears to use nine 8 V golf cart batteries, which are typically rated at 100 Ah to 200 Ah, depending on the rate of discharge; lithium-ion batteries (even LiFePO4) can handle higher sustained discharge rates and deeper (to a lower state of charge) discharge than lead-acid, so the comparison is reasonable.

I can;t thank you enough Brian for the feedback and direction. Most helpful and greatly appreciated.