2013 precedent slowing down on hills

mannvel

Hey All,
Looking for some advice.

I have a 2013 48V I2L Excel Precedent with an XCT48500 Controller with FNKS. 2ga Cable upgrade as well as a HD400amp Solenoid. I have checked all the batteries and ensure they have the proper water levels. Used a hydrometer and they are all in between fair/good levels.

I have also rechecked all my settings on the controller to ensure there was nothing limiting.
what I notice is that on hills the car slows down significantly and the voltmeter drops down to 38-39V.

Does this mean that my batteries need replacement? MCOR issues? need some help.

BGW

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WalterM6

Sounds like it's battery time. Make sure all of your cables are torqued to 100 in/lbs. Try wiggling the cable from side to verify they are tight. What did the voltage use to drop down to on the same hill?

Sergio

It does look like the batteries can no longer produce the current You need to drive uphill.

One thing you can try with the XCT to mitigate the effects is to lower the "Max Motoring Battery Amps" to 200 amps (or even 150 amps).

This will not affect your ability to generate up to 500 amps during partial throttle, that setting is controlled by the the "Max Motoring Armature amps".

WalterM6

You never did mention what kind of motor you have. If you are slowing down to about 13mph you may be needing a motor with more HP. Especially if you are in Western NC

mannvel

@ Walter M6. The cables are tight but no way for me to check that they are at 100lb torque.
As far as motor it is a CC part number 103572501 model EJ8-4001A. 48V , rating is : AU2500. 3.3 HP.

I live south of Raleigh so when I say hills I mean just slopes in our community nothing mountainous.

mannvel

@ Sergio
Will try that setting on the Alltrax to see how it changes.
I been looking for a battery load tester that can do 8v batteries. But I have not found any. Any recommendations..??

mannvel

@ Walter M6. The cables are tight but no way for me to check that they are at 100lb torque.
As far as motor it is a CC part number 103572501 model EJ8-4001A. 48V , rating is : AU2500. 3.3 HP.

I live south of Raleigh so when I say hills I mean just slopes in our community nothing mountainous.

mannvel

Will try that setting on the Alltrax to see how it changes.
I been looking for a battery load tester that can do 8v batteries. But I have not found any. Any recommendations..??

Sergio

As far as the load test, You already did one and the batteries failed, 38v is way too low under moderate load, You should expect 44v or so under load.

mannvel

Update***
So after reading some posts about battery checkups I did the following. I used a voltmeter and attached it to each battery while the car was standing, and also measured while riding "going uphill" My battery set up is 6-8v Batteries.
Test was done after a full overnight charge and voltmeter across all batteries read 50.0v which matched the voltmeter on the cart.
Not sure what length of time had passed after the charger had stopped. (overnight)

DO i need new batteries? I know I prob need to replace No.4 Below; but will one battery make such a big difference..?

There are the findings:

Battery No. Standing Voltage Uphill Voltage Drop
No 1. 8.3v 7.4v
No2. 8.3v 7.5v
No.3. 8.3v 7.4v
No 4. 8.3v 5.4v
No.5 8.3v 7.1v
No.6. 8.2v 7.2v