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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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10-30-2020, 12:05 PM | #11 |
Not Yet Wild
Join Date: Feb 2020
Location: Pretoria, South Africa
Posts: 36
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Re: Brand new batteries draining too quickly
Hi Everyone,
im a bit stumped on this situation again. After playing a round of golf and letting the batteries rest i measured 37.6V on my cart. SOC meter show 7 of 10 on the display bar. A buddies identical TXT 36 measures also measures 37.6V with 5 year old Trojan's, but shows bar 5 of 10 on the SOC meter How are we both getting the same voltage with 5 year vs 5 month batteries? Leads me to think something is not right on mine? |
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10-30-2020, 12:59 PM | #12 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Brand new batteries draining too quickly
Quote:
As for the next to last question: The at-rest voltage can be used to estimate the SoC (State of Charge) but not the batteries age. No two carts, motors, controllers, drivers or driving styles are identical, but if there were, your buddy appears to have exceptionally well maintained batteries. |
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10-31-2020, 12:11 AM | #13 | |
Gone Wild
Join Date: Nov 2016
Location: near Calgary, AB, Canada
Posts: 1,511
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Re: Brand new batteries draining too quickly
Quote:
A possible explanation is that at 5 months old your battery pack is not likely fully broke in yet. As per the attached Trojan Battery Testing Plot, it takes a T-105 battery approximately 110 charge cycles to reach its specified capacity. As you can see from the plot, it takes many more charge cycles to reach its full capacity. Notice also from the plot that a T-105 battery at 80 charge cycles (about where your batteries could be) has the same capacity of a T-105 battery at 660 charge cycles (about where your buddy's batteries could be) ... the difference being that the 80 charge cycle battery pack is just at the beginning of its life cycle and the 660 charge cycle battery pack is nearing the end of its life cycle ... even though both have the same capacity. I suggest that this is the case for your 5 month old battery pack and your buddy's 5 year old pack. I don't think you have much to worry about if you are charging and maintaining your batteries correctly ... they will live long and prosper |
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