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Post by magicmikej on Aug 1, 2015 15:41:49 GMT -8
Generally speaking, is it better to get 2 6v golf cart batteries and wire them in series as opposed to getting 1 12v marine battery, assuming they are both deep cycle?
I'm looking a the Deka GC15 6v golf cart battery, says it's 448 Amps, upon further digging I find that it's 215 amp hours (20AH rate). I also see a Deka Marine battery, DC31DT that is 12v 810 Amps, and in an asked question someone said it's 105 amp hours at the same (20AH rate). Does that sound right?
If that is true, then it seems the logical choice is the 2 6v golf cart batteries, although it will cost twice as much, as well as weigh twice as much.
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Post by peggy on Aug 2, 2015 7:23:37 GMT -8
this might help you to decide. assuming 9 volts is cut-off. we have 1 120 amp hour battery that last three hours using only 15 amps an hour. its not all about the ah is also has to do with fully charged voltage and fully discharged voltage our invert shuts off at 10 volts leaving 1 full volt of unusable power. if battery a is fully discharged at 10 volts compared to battery b fully discharged at 9 but your inverter shuts of at 10. the choice should be a because it is fully discharged battery b isn't it could still have available ah's that you cant use because of inverter shut off. how many unavailable ah's good question. we just shut inverter off and continue to use only anything that is 12 volt until it gets to around 9.3 the next problem is our charge controller wont turn on below 9 volts.
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Post by Admin on Aug 4, 2015 11:23:51 GMT -8
Hello Sir,
All that information you provided sounds right. I would recommending using 12 volt batteries if you ever plan on upgrading since all you will need to purchase is one battery instead of 2 at a time. You can either go with two 6 volt batteries and that will give you 12 volts and 215 AH while going with two 12 volt batteries will give you 210 AH.
O.C
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Post by magicmikej on Aug 4, 2015 14:45:38 GMT -8
Thanks Admin/O.C. That makes sense in the leaving room for upgrading at a lower cost (and space) sense.
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Post by country boy on Apr 11, 2016 20:21:36 GMT -8
I have 2 100 watt renogy panels in parallel and a 30 amp mppt c.c. with 2 12 volt batteries also parallel .Can I wire the two panels in series each has a vmp of 18.9 volts in parallel would be 37.8 volts and still charge my 12 volt bat.s without any damage to any part ?
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Post by Admin on Apr 12, 2016 7:40:30 GMT -8
Hello Sir,
If it was the 30 amp tracer controller that would be under the rated DC voltage input so there would be no damage to parts. The excess voltage would be converted into amperage with the MPPT controllers.
A.L.
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Post by Country Boy on Apr 13, 2016 20:01:30 GMT -8
Thanks A.L.for the information. This was what I was thinking just needed some one to confirm it for me and you were correct about c.c. it is a EPsolar mppt with a 150 v max input and 390 watt max PV input. Love my 2 100 watt RENOGY panels, had two sets of Harbor Freight panels. That's like going from the basement to the Penthouse in one leap. H.F. carried me for a few years, but 6x15 watts=90 watts now 2x100=200 watts with RENOGY. Going to try series connection soon and am hopeful . Again thanks.
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Post by spiderbob on Apr 16, 2016 11:41:20 GMT -8
There are several advantages in selecting the 6-volt golf-car battery over the typical 12-volt marine/RV for use in your RV and/or cabin.
1. Generally speaking, with the proper maintenance, 6-volt batteries have a much longer life, as much as two times longer, than the 12-volt. This is a result of thicker plates which can better withstand the effects of deep cycling.
2. Six-volt batteries usually have more capacity than 12-volt batteries. When comparing capacity, the 20-hr rate and the reserve minutes rate are commonly used.
The 20-hr rate measures the total amount of energy that a battery can deliver over 20 hours, at a constant rate of discharge, before the battery drops to 10.5 volts (100% discharged). The T-105, our premier 6-volt golf-car battery, has a 20-hr capacity rate of 225 amp-hour versus 115 amp-hour for our best marine/RV battery, the 27RVH. Reserve minutes is the number of minutes that a battery can run a 25-amp load before it drops to 10.5 volts. The T-105 has 447 reserve minutes while the 27RVH has 200 reserve minutes.
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Post by spiderbob on Apr 19, 2016 21:32:39 GMT -8
I just meant a man that is installing 10 - 12v batteries each with 145ah. This is quite impressive, when you figure the differnece say you intall 10 6v batteries even at 232ah each each pair has to be in parallel for 12v so actually you are only getting 5 x 232ah or 1160ah and the 12v batteries with 145ah are getting for the 10 batteries 1450ah, that is a pretty impressive amount. He also has 1800w of solar power and this is all on his Motorhome. The batteries he is using are AGM, although a slight loss there, I believe would be minor. There is a considerable weight difference between the AGM and the 6v as well. I only bring this up because if you are using multible batteries, do the math, as 12v may just do you better, when in a limited space.
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Post by mariewagner on Apr 27, 2017 14:53:02 GMT -8
Nothing ruins your day on the links like seeing your new battery die. Makers of the best golf cart batteries stand behind their products and have you covered with their warranty programs, so you can focus more on getting your swing right and less on getting to the next hole. Manufacturers like Exide Technologies employ world-class manufacturing techniques to make sure their batteries are free from defects. |
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