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Battery Drain |
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StephenH 
podders Helping podders - pHp 
Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6326 |
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 Topic: Battery DrainPosted: 30 Nov 2022 at 10:09pm |
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6V batteries need to be connected in series so you have 12V power. Parallel maintains the same voltage but adds the capacity. Series adds the voltage. but maintains the same capacity.
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StephenH
Happy is the man that findeth wisdom,... ouR escaPOD mods Former RPod 179 Current Cherokee Grey Wolf 24 JS |
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Jefferson
Newbie 
Joined: 29 Apr 2021 Location: NorCal Online Status: Offline Posts: 18 |
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Posted: 30 Nov 2022 at 11:10pm |
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Got it - thanks. All starting to make sense now. Appreciate the additional info.
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Jefferson
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Joined: 29 Apr 2021 Location: NorCal Online Status: Offline Posts: 18 |
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Posted: 02 Dec 2022 at 1:28pm |
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Cleaned all connections and terminals - let charge overnight, voltage still ~5-6v when unplugged from shore power. In the market for two new batteries. Thanks again for all the help - great resource we have here.
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StephenH
podders Helping podders - pHp
Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6326 |
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Posted: 02 Dec 2022 at 1:58pm |
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Things to consider:
Two 12V batteries will weigh much less than two 6V batteries. The trade-off is in capacity. The only way to beat two 6V batteries is by converting to LiFePO4, which entails a lot of other changes (see my mods for information about that). Batteries that can be checked and distilled water added if needed are better than sealed batteries that really just mean that you can't do maintenance on them. This applies if you are going to stick with lead-acid batteries. There is a reason that two 6V batteries have more capacity -- weight. More lead means heavier, but more capacity. Consider the weight though when planning your loading. Those 6V batteries are heavy!
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StephenH
Happy is the man that findeth wisdom,... ouR escaPOD mods Former RPod 179 Current Cherokee Grey Wolf 24 JS |
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Grinkle192
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Joined: 15 Oct 2022 Online Status: Offline Posts: 18 |
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Posted: 02 Dec 2022 at 4:06pm |
Comparing two batteries of the same physical size, in general, a 6V battery has fewer cells in it than a 12V battery, so it has fewer lead plates, so it weighs less. I think you would agree with the fewer cells thing, so I am wondering if I mis-understand your comment or if maybe you have a typo in your comment. I don't think 6V and 12V batteries will typically be the same size, though. In systems I have read about, the 6V batteries are a smaller form factor than the 12V batteries being compared against, and the folks decide what to use based on what they have space for. To the OP, if you replace 2 6V batteries with 2 12V batteries, I'd be surprised if the weight does not increase and the space needed increases. Along with that, I'd expect your capacity to increase. This depends on the specific batteries involved, and I'm sure its possible you have 6V batteries right now that are so large that you can find 12V batteries that are lighter and smaller, but I don't think that is typical. |
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jato
Senior Member
Joined: 23 Feb 2012 Location: Kewadin, MI Online Status: Offline Posts: 3252 |
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Posted: 02 Dec 2022 at 4:08pm |
This is why we now have a Trojan T-1275 (golf cart battery) better capacity 150 aH and more weight at 85 lbs. This is in addition to the 12v Interstate group size 24 deep cycle battery (11.5 yr. old) kept on the a-frame. I used to keep a few truck rotors in the front so the tongue weight would be 11% of total weight of the 177. Now, with the extra battery weight, tongue weight is 340 lbs. and that is with a full FW tank which on the 177 is located behind the axle. Normally camp w/o amenities so battery life and water capacity are very important. Added bonus - was able to remove the truck rotors, freeing up valuable storage space.
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God's pod
'11 model 177 '17 Ford F-150 4WD 3.5 Ecoboost Jim and Diane by beautiful Torch Lake "...and you will know the Truth and the Truth will set you free." |
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Grinkle192
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Joined: 15 Oct 2022 Online Status: Offline Posts: 18 |
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Posted: 02 Dec 2022 at 4:23pm |
You need 2 of these batteries to get 12V and 150Ah @ 12V, , so I expect the total weight is 170 lbs. A single 150Ah 12V battery weighs 91 lbs. The sizes of these batteries are (out of curiosity I looked them up) - 12V - ~1200 cubic inches 6V - ~1000 cubic inches So if you compare 2 batteries vs 2 batteries, the 12V batteries will weigh a bit more (I am surprised at how little more) and have a almost twice the capacity. Makes me think I am not understanding something here, I'd expect the 6V batteries to have more capacity than that for the size they are. |
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jato
Senior Member
Joined: 23 Feb 2012 Location: Kewadin, MI Online Status: Offline Posts: 3252 |
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Posted: 02 Dec 2022 at 5:50pm |
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Have to disagree with your post Grinkle as the T-1275 IS a 12v battery, not 6v. Just was on their website to verify what was originally stated: https://www.trojanbattery.com/product/t-1275/ and Trojan shows their T-1275 battery weights in at 39kg or 85 lbs. Also the 20 hr. capacity of a single battery is 150 aH, the 100 hr. capacity rating is 166 aH.
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God's pod
'11 model 177 '17 Ford F-150 4WD 3.5 Ecoboost Jim and Diane by beautiful Torch Lake "...and you will know the Truth and the Truth will set you free." |
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Grinkle192
Newbie
Joined: 15 Oct 2022 Online Status: Offline Posts: 18 |
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Posted: 02 Dec 2022 at 6:03pm |
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I am corrected, Jato - thanks! I assumed without checking that you were talking about a 6V battery. Now the comparison makes much more sense to me! I wasn't comparing 6V to 12V at all.
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jato
Senior Member
Joined: 23 Feb 2012 Location: Kewadin, MI Online Status: Offline Posts: 3252 |
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Posted: 02 Dec 2022 at 6:32pm |
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No worries Grinkle. The thought after first reading your post was that exactly, thinking that the T-1275 was a 6v battery. Regardless, maintenance is key to any battery longevity. My only experience is with lead acid batteries. Keep clean (posts and outside shell), keep an eye on electrolyte levels and only use distilled water when adding and finally do not take below 12.2 v before recharging. Looking forward to having my 12v Interstate celebrate its 12th birthday in April 2023.
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God's pod
'11 model 177 '17 Ford F-150 4WD 3.5 Ecoboost Jim and Diane by beautiful Torch Lake "...and you will know the Truth and the Truth will set you free." |
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