Buggies Gone Wild Golf Cart Forum - View Single Post

bronsonj · 05-10-2021, 10:02 AM

Nice! I have one of those Fiat 500E packs in my son's power wheels. Three wired in series and charged to 4.1vpc puts you at 61.5v. The Alltrax controllers are good up to 62V so you can get all three sets in there wired in series. If you discharge to 3.30vpc then your pack voltage swing is from 61.5v down to 49.5v. The controller you'd want would be the 300 amp Alltrax and you can limit that from their software to 250 amps to match the battery.

The Alltrax you can set to stop the cart at whatever voltage you want. Obviously that doesn't replace the BMS but you can set that to 50V for the LV cutoff then in the BMS you can set the stop voltage to 3.25 or 3.3vpc.

The Smart Ant looks like it'll suite your needs. I have no experience with that BMS but it sounds quite capable.

05-10-2021, 10:02 AM	#4
bronsonj Gone Wild Join Date: Jan 2013 Location: Saint Petersburg, FL Posts: 2,089	Re: How to choose BMS Nice! I have one of those Fiat 500E packs in my son's power wheels. Three wired in series and charged to 4.1vpc puts you at 61.5v. The Alltrax controllers are good up to 62V so you can get all three sets in there wired in series. If you discharge to 3.30vpc then your pack voltage swing is from 61.5v down to 49.5v. The controller you'd want would be the 300 amp Alltrax and you can limit that from their software to 250 amps to match the battery. The Alltrax you can set to stop the cart at whatever voltage you want. Obviously that doesn't replace the BMS but you can set that to 50V for the LV cutoff then in the BMS you can set the stop voltage to 3.25 or 3.3vpc. The Smart Ant looks like it'll suite your needs. I have no experience with that BMS but it sounds quite capable.