T-875 vs T-890

[Bkfiremedic]

Getting ready to do my upgrade from 36v to 48v. Decided to go with 6-8v batteries. I was looking at Trojan Batteries. I'm leaning towards the T-875's because there is quite the price difference. The guy at the battery store decided to argue with me telling me that going to a 190 or 170 amp/hr battery was going to decrease my performance from 6/6v batteries because the 6v batteries are more amp/hr. I'm just looking for more torque/power because I have some smaller hills for hunting. I know my 36v battery pack is dying and if I'm buying new batteries I just want to switch to 48v. I'm upgrading my controller, solenoid, F/R switch thru Scotty B. I can't see paying that much more for the 890's for a little increase in run time.


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[Bkfiremedic]

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[Sir Nuke]

The guy at the battery store if full of SH*T...... if you have a standard 6v cart battery, it is 225 AH.....X6 = 1350 ah total......a standard 8v cart battery is 170 AH .... X8 = 1360 AH total....so for all intensive purposes.....they will net you the same.....however, by going to 48v you will have more torque, and speed.

[Bkfiremedic]

Originally Posted by Sir Nuke

The guy at the battery store if full of SH*T...... if you have a standard 6v cart battery, it is 225 AH.....X6 = 1350 ah total......a standard 8v cart battery is 170 AH .... X8 = 1360 AH total....so for all intensive purposes.....they will net you the same.....however, by going to 48v you will have more torque, and speed.

I figured that lol but if I use 6-8v batteries wouldn't it be 170 x 6?


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[cgtech]

If you are buying batteries, buy the highest AH you can afford! Always! Just don't buy 8v's with lower capacity than T-875s.

[Sir Nuke]

Originally Posted by Bkfiremedic

I figured that lol but if I use 6-8v batteries wouldn't it be 170 x 6?


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its 170AH X 8V not the number of batteries......1360

[Bkfiremedic]

Originally Posted by Sir Nuke

its 170AH X 8V not the number of batteries......1360

Gotcha, thanks


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[cgtech]

Originally Posted by Sir Nuke

The guy at the battery store if full of SH*T...... if you have a standard 6v cart battery, it is 225 AH.....X6 = 1350 ah total......a standard 8v cart battery is 170 AH .... X8 = 1360 AH total....so for all intensive purposes.....they will net you the same.....however, by going to 48v you will have more torque, and speed.

This is bad math for golf cart purposes. That would work if you put them in parallel. Golf carts work in series strings. For this application, you multiply the individual battery Ah by total pack voltage to get "watt-hours". Remember that running in series increases voltage, not amperage.

[cgtech]

Accidental repost.

[Sir Nuke]

Originally Posted by cgtech

This is bad math for golf cart purposes. That would work if you put them in parallel. Golf carts work in series strings. For this application, you multiply the individual battery Ah by total pack voltage to get "watt-hours". Remember that running in series increases voltage, not amperage.

True.....it was meant to illustrate that a standard 36v pack is essentially the same as a 48v pack.

using the math:
225 AH x 36v = 8100 watt-hrs.
170 AH x 48v = 8160 watt-hrs.