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Old 07-24-2022, 04:42 PM   #1
addicted2powerwheels
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Default Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Hi, I have a 76 marathon 36v with 20in tires. I use it for going around the RV park which has one long hill that is a little steeper in places. On the step parts, It will slow down to a crawl, but i do make it up. I'm just wondering if running 38v would give me that little extra kick to make it the hill. Since the charger runs closer to 40v, it would still work, right? Thanks.
BTW, I did try to search for this, but could not find anything on it :)
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Old 07-24-2022, 05:54 PM   #2
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Simple question. How would you charge it?
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Old 07-24-2022, 05:56 PM   #3
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Simple question. How would you charge it? You could add another 6 volt battery making it 42 volts which you can get a charger for. More speed and more range. There’s enough room on the drivers side to add 1 more.
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Old 07-24-2022, 06:10 PM   #4
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

You would still be undercharging the batteries. Yes your charger runs above 40 volts, but then the batteries settle to (ideally) around 38.2. Probably be about the same ultimate voltage with the one additional cell - leaving all the cells in your pack slightly undercharged. The more common work around is to add one more 6 volt battery, usually in the bag well. There are available 42 volt chargers that would then tend to that combination appropriately. The downside is the expense of another battery & a different charger.
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Old 07-24-2022, 06:17 PM   #5
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Bad idea. No standard chargers exist for that voltage.
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Old 07-24-2022, 06:27 PM   #6
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

42 volt chargers are available but not very popular and can be pricy. If you can find someone selling a 48 volt DPI at a very reasonable price (because they upgraded to lithium) you can buy a new circuit board for 42 volts and it will work perfect. You may also have to change your controller and possible solenoid.

Last edited by Capt. Lenny; 07-24-2022 at 06:31 PM.. Reason: Forgot something
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Old 07-24-2022, 06:36 PM   #7
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Thx to all that replied thus far. My thought was the original charger would be good enough but sounds like that is NOT the case. My other option is high torque motor. I'm not looking for speed as we have a limit of 6mph here.
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Old 07-24-2022, 07:34 PM   #8
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

A couple thoughts...

How old are the batteries ? Do you really like the cart ? If they are near replacement it might be better to upgrade to 48V. Scotty B has some upgrade options on his site. He's a sponsor and you can find his site under that tab.
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Old 07-24-2022, 07:46 PM   #9
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Quote:
Originally Posted by Capt. Lenny View Post
42 volt chargers are available but not very popular and can be pricy. If you can find someone selling a 48 volt DPI at a very reasonable price (because they upgraded to lithium) you can buy a new circuit board for 42 volts and it will work perfect. You may also have to change your controller and possible solenoid.
He's talking 38V (Nominal) which is not a supported voltage that I have ever seen.
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Old 07-25-2022, 05:43 AM   #10
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Default Re: Pros\Cons to adding 1 8v battery to 36v cart (38v)?

Here's another option to investigate. Give Plum Quick a call and see if they can do a "Bandit" upgrade on your existing motor. For $325 plus shipping, it's good bang for your buck. They claim a 25% increase in torque plus more speed and from my experience (seat of the pants) it was a great improvement.
https://plumquick.com/bandit-electric-motor-golf-cart/
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