Quote:
Originally Posted by onewheelcop
I have just purchased 8 6volt Trojan T105's to convert it from 36 to 48v as i have read that Trojan battery company itself has put out an estimated range for various configurations. And they estimate that 8 6volt T105's will get you an estimated 80 percent longer drive time than the 6 8volt T875 configuration ( from an estimated 20ish miles to 35ish miles ). So i opted for more juice!!
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Range is determined by battery storage capacity vs the cart's Watts/Mile, much akin to how a car's driving range is determined by how many gallons the fuel tank holds vs the car's MPG. There is one difference though, the slower you draw energy from a lead-acid battery, the more energy can be withdrawn (Peukert's law).
A 6X8V pack of T-875 batteries stores 8.7 kWh of energy while a 8X6V pack of T-105 batteries stores 11.5 kWh of energy, or 2.8 kWh more. That is only a 32% increase in storage capacity (range). Granted the discharge rate will be slightly lower for the higher capacity pack, but I seriously doubt if the Peukert factor is enough to up the estimated range difference from 32% to 80%.
On the other hand, I manged to get a 35ish mile range from my 7X6V (42V - 245AH) battery pack (10.9 kWh of storage), but I have a sepex drive with regen braking that puts some energy back in the battery.