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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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08-10-2014, 06:47 AM | #11 |
Gone Wild
Join Date: Sep 2012
Location: Savannah, GA
Posts: 2,760
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Re: 48 Volt DS With 36 Volt Batteries
I actually bought two 48v cc ds's that BOTH had six 6v batteries in them (36v). The owner was using the 48v charger too for a couple years. Unbelievable. Yes the batteries were shot when I got the carts. The carts did run but were so slow due to 36v.
Swapped in the correct 8v batteries and the carts ran like new. Nothing was damaged. |
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08-10-2014, 09:50 AM | #12 |
Not Yet Wild
Join Date: Aug 2014
Location: Phoenix
Posts: 14
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Re: 48 Volt DS With 36 Volt Batteries
It is good to know that there is at least a possibility little else is wrong with the cart. I had planned to have it running by now, but after I took the batteries out, parts of the battery rack were so corroded from acid leakage, I had to start with replacing two of the angle brackets (batteries 5 & 6). It did run with the 6 volt batteries, maybe 7-8 MPH tops.
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08-24-2014, 12:21 AM | #13 |
Not Yet Wild
Join Date: Aug 2014
Location: Phoenix
Posts: 14
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Re: 48 Volt DS With 36 Volt Batteries
Thanks for the help everyone, got the batteries in, 4ga cables, new tires, and a new micro switch in the potentiometer. It runs pretty good 18-19 MPH on the level according to my GPS. Found the light switch and headlight bulbs were fried and the 48 to 12 volt converter was bad as well, but not too much wrong that can't be easily fixed.
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08-24-2014, 01:32 AM | #14 |
Gone Wild
Join Date: Jan 2014
Location: South Georgia
Posts: 1,120
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Re: 48 Volt DS With 36 Volt Batteries
Sounds like he possibly used a 48 volt charger to charge them.
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08-24-2014, 05:10 PM | #15 |
Not Yet Wild
Join Date: Aug 2014
Location: Phoenix
Posts: 14
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Re: 48 Volt DS With 36 Volt Batteries
The previous owner had the cart hooked up to the 48 volt charger when I first saw it. The batteries were sweating, bulging, and even the battery tops were so swollen that the posts weren't straight. The batteries would not hold a charge beyond a trip around the parking lot, and I doubt the cart would hit more than 10 MPH.
The batteries were about two years old, I doubt that they were maintained very well, and I believe attempting to charge them with a 48 volt charger couldn't have been good for them either. I wouldn't buy it until I was sure everything worked, and he charged two batteries at a time with a 12 volt charger to get the battery pack to the point the cart would run for a little while. I knew that I would have to get batteries right off, but didn't want to buy the cart if it was totally screwed up and needed all the expensive parts replaced. I have had golf cart shops here in the Phoenix area tell me that well-maintained batteries will last 5 years and longer, but most of the people I know that have electric carts will tell you 5 years is really pushing it in this climate. |
08-25-2014, 09:30 AM | #16 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 48 Volt DS With 36 Volt Batteries
Quote:
Attached is a chart illustrating battery life expectancy based on temperatures. Looks like it drops about 15% for each 10° above 77°F. I'm not sure how to correlate this to battery lifespan percentage, but the five year average of degree-days above 77°F annually for Phoenix area is 2,538 while it is only 271 in my area, so I suspect my current battery pack will last longer than the first two. |
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08-25-2014, 07:11 PM | #17 |
Not Yet Wild
Join Date: Aug 2014
Location: Phoenix
Posts: 14
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Re: 48 Volt DS With 36 Volt Batteries
Wow, I have heard some horror stories of 12-18 month battery life here in Arizona from golf card shops, but they usually say it has to do with poor maintenance. I have always been an internal combustion engine fan, but after owning 2 Honda Insight Hybrids, I decided I would take the electric route with a golf cart to see if I liked electric propulsion as well as I think I do. If I end up having to buy new batteries in 18 months... not so sure.
You have the days over 77 degrees right, we never get a hard freeze here in the "Valley of the Sun". As they say "It's a dry heat", but hot is hot! Has been as high as 116 degrees this summer. |
08-25-2014, 08:34 PM | #18 | |
Gone Wild
Join Date: Jun 2014
Location: Sunset Bay, TN
Posts: 2,390
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Re: 48 Volt DS With 36 Volt Batteries
Quote:
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08-26-2014, 08:04 AM | #19 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 48 Volt DS With 36 Volt Batteries
Quote:
There is a reduction in lifespan due to temperature higher than 77°F, but I believe the 12 - 18 month horror stories are due to a combination of poor battery maintenance and lackadaisical charging practices, in addition to the high ambient temperatures and low humidity. Cart batteries that are treated badly don't last very long in moderate and cold climates either. ---------- I listed the annual Degree-Days above 77°F based on a 5 year average. A "Degree-Day" is how many degrees the average temperature for a day is above (or below) a selected reference point. For example: If the high temperature for the day is 110 and the low is 70, the average temperature for the day is 90. The reference temperature is subtracted from the average temperature to get degree-days. Therefore: 90 -77 = 13 Degree-Days for that day. The heating and cooling degree-days used by HVAC industry and power companies typically use 65°F as the reference point, but I found a calculator online that allows user selectable reference temperatures and uses temperature data collected from numerous local weather stations. http://www.degreedays.net/ For the Phoenix Degree-Days I used data from Sky Harbor airport (KPHX). |
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