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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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08-20-2014, 08:19 AM | #1 |
Gone Wild
Join Date: Sep 2009
Location: WI
Posts: 157
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Adding one more Battery
Just got done building a 99 Ezgo. It has a 500 amp Spm controller, brand new reversing contactor from Scotty B. New Trojan Batts . I know that it is a series motor and the only way to make it go faster and more torque is to add more power. Can I add just one more batt to make it a 42 volt rather than add two more for 48? Problem being no more room under the seat!. And will the Spm automatically recognize the voltage increase? Also is it really worth the extra money?
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08-20-2014, 08:55 AM | #2 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Adding one more Battery
Check with Scotty to be sure, but I think all you will have to do is add the seventh battery and change the 250 Ohm pre-charge resistor to 470 Ohms.
The SPM48500EZ package comes with the Super-Duty solenoid (400A) and both will work at 36V, 42V and 48V. The fuse included is probably an ANN400, which is good good for 42V also. You will also need one more high current cable and a 42V battery charger. I use the DPI Accusense 42V, which is the best thing since sliced bread. You may have to adjust the controller's High and Low voltage settings and maybe some other minor tweaking. With a 7 x 6V 42V pack, you'll get about a 16.7% increase in Speed, Torque and Range. |
08-20-2014, 09:02 AM | #3 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,344
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Re: Adding one more Battery
Johnnie is right about the SPM48500 and superduty 400a solenoid. The 36v reversing contactor activation circuit needs to remain on 36v. To do this make sure the neg(-) side of the circuit is connected to the post on the 6th battery (not the 7th). Your original install instructions cover this.
You should see about a 17% increase in overall performance with the extra battery added. |
08-20-2014, 04:52 PM | #4 |
Gone Wild
Join Date: Sep 2009
Location: WI
Posts: 157
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Re: Adding one more Battery
10-4 thanks guys
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08-20-2014, 05:23 PM | #5 | |
Not Yet Wild
Join Date: Jul 2014
Location: Houston, TX
Posts: 44
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Re: Adding one more Battery
Quote:
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08-21-2014, 04:02 AM | #6 |
Gone Mad
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
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Re: Adding one more Battery
No/yes (you asked two questions). The reversing contactor has coils, much like the solenoid does. An FNR doesn't have coils, and within reason, doesn't care about voltage at all. It only cares about amperage, and you (apparently) have the HD FNR, so assuming your solenoid and controller can take the voltage, you're good to go. Don't forget you'll need a charger.
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08-21-2014, 05:43 AM | #7 |
Gone Wild
Join Date: Nov 2011
Location: Danville,Va.
Posts: 653
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Re: Adding one more Battery
I have the HD F/R on 48 v with no issues
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08-21-2014, 07:09 AM | #8 |
Not Yet Wild
Join Date: Jul 2014
Location: Houston, TX
Posts: 44
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Re: Adding one more Battery
Thanks yurtle and cableguy. I have scottyb's hunting buggy setup with the HD FnR and 2 ga cables. Upgrading to 48 volts was my next step until I got home from work and realized that the ac in the house crapped out on us. The wife was none too happy about that, and neither was I because the ac guy took my cart money.
But thanks for the answers. |
08-21-2014, 09:03 AM | #9 |
Gone Wild
Join Date: Nov 2011
Location: Danville,Va.
Posts: 653
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Re: Adding one more Battery
The only other thing I can thing off I needed was the resistor the Johnny B mentioned. I can't remember if it was supplied by Scotty or if I had to get that myself
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08-22-2014, 08:46 AM | #10 |
Getting Wild
Join Date: Mar 2010
Location: Lower Slower Delaware (LSD)
Posts: 100
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Re: Adding one more Battery
Jumping form 36 to 42 or 48 with solenoids.
Throughout the site there is reference to not running 12 volt items off two batteries and instead using a voltage reducer. How does running 36V solenoids off of the 6th battery differentiate here? I would like to jump to 42 or 48, but have considered the cost increase to be too great. 1 or 2 batteries, charger, voltage reducer (mine is not a multi voltage) and two big expensive solenoids (36V). Keeping all the batteries under the seat would limit me to 42V, and I'm thinking at least a $400 upgrade with just one battery and charger. |
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