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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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05-25-2012, 11:54 AM | #11 |
Gone Wild
Join Date: Aug 2010
Location: Marion, Ohio
Posts: 1,391
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Re: Adding a 12volt battery
No matter where you tap that 12v, all the batteries in that circuit are being subjected to excessive charging current.
I bought a 12v accessory plug at a local department store for $10. It took a step drill and five minutes to install it. That's what I use to charge my 12v. If I was so desperate for a little extra 12 v, I'd just remove the lead for my winch( I use the contactor leads to get the 12 v under the dash and tap my fuse block for the other accessories from that) and tap the main pack with it temporarily. I can't see that happening, though. I've put in a lot of 16 hour days on that cart and never run out of 12 v. |
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05-25-2012, 12:43 PM | #12 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Adding a 12volt battery
Quote:
2. No, not exactly. The charger pumps current through the series string until the combined voltage of the series string totals about 45V. The charger only senses total voltage, so if one or more of the batteries has abnormally low on-charge terminal voltage, the rest are charged to an abnormally high voltage; And the opposite is true if one or more of the batteries has an abnormally high on-charge voltage. 3. That isn't how batteries in series charge. They all have the same current passing through them, so they all charge simultaneously rather than sequentially. If the battery pack is imbalanced, (IE: some batteries used more than others or connected in something other than a pure series string), they will not be charge equally. This is why a new battery quickly deteriorates when added to a used pack and a relatively new battery pack quickly goes bad if a failed new battery is replaced with an old battery. 4. No, that isn't the case. See #3 |
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05-25-2012, 06:01 PM | #13 |
Getting Wild
Join Date: Apr 2009
Posts: 137
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Re: Adding a 12volt battery
I use a 12 volt battery for my lights and accesories. I use a lawn mower battery. I installed an onboard charge I got at Harbor Freight for 20 bucks. I leave an extension cord at my charger and plug it in once a week or so..... Works great. The battery lasted 3 years before i had to get a new on a few days ago. You can see a little bit of it in this pic...
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05-26-2012, 10:33 AM | #14 |
no clue
Join Date: Sep 2009
Location: spicewood, texas
Posts: 3,308
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Re: Adding a 12volt battery
wow! that shop is too clean.
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05-28-2012, 08:15 AM | #15 |
Getting Wild
Join Date: Apr 2009
Posts: 137
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Re: Adding a 12volt battery
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05-28-2012, 12:55 PM | #16 |
Gone Wild
Join Date: Aug 2011
Location: Central Delaware
Posts: 859
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Re: Adding a 12volt battery
Ok, I am now sufficiently jealous
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05-28-2012, 04:35 PM | #17 |
Not Yet Wild
Join Date: May 2011
Posts: 8
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Re: Adding a 12volt battery
I just use a separate charger to keep my onboard 12v battery topped off. I use it to power my head/tail lights and radio.
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05-28-2012, 04:37 PM | #18 |
Not Yet Wild
Join Date: May 2011
Posts: 8
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Re: Adding a 12volt battery
And also extremely jealous of your shop. My 2 car garage is a wreck.
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05-30-2012, 11:44 AM | #19 | |
Not Yet Wild
Join Date: May 2010
Posts: 17
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Re: Adding a 12volt battery
Quote:
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