3c or 6c? what is it I really need for a golf cart?

L0veless

New Member
Joined
Jan 25, 2021
Messages
4
I'm wanting to build a 48 volt system for my golf cart, where I'm concerned is what battery do I really need?
I'm looking at 16s 105ah batteries, I see the 3c constant discharge at 100 amp with surge of 300amp My cart usually runs at around 100 to 150 amp would the 3c work or do I need to go up to 6c? I want to run a 250 amp BMS. what do you guys use for your golf carts?

TIA
 

Barbar0ssa

Solar Enthusiast
Joined
Mar 3, 2021
Messages
77
The C rating is the rate of charge or discharge related to battery capacity. A 105AH battery discharging at 1C rate will be discharging at 105Amps and will be empty in 1 hour. A 105AH battery discharging at 3C will be 315amps and will be empty in 20 minutes (1/3 of an hour). Charging works exactly the same way.

So any battery charging at 1C will be full in 1 hour (1/1). Charging at 6C would be 1/6 of an hour. High C rates are hard on batteries.

My 48v golf cart has 150Ah batteries and I am installing a 70a motor controller (I don't need to go super fast, but I haven't been able to test it yet to know if that is fast enough). 70/150 = 0.4666C at full throttle.

Consider 1 horse power is 746w. My cart originally put out 2hp. With my new controller, 70*50v = 3500w of power. 3500/746 = 4.69hp so this is quite an increase in power for my golf cart.
 

newbostonconst

Solar Addict
Joined
Sep 24, 2019
Messages
617
Don't use battle born....the bigger the battery the less C you need.... Go big or go home...
 
Top