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6v vs 12v |
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MattSki 
Newbie 
Joined: 17 Mar 2017 Location: Truckee, CA Online Status: Offline Posts: 5 |
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 Topic: 6v vs 12vPosted: 22 Dec 2019 at 11:42am |
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Was wondering about converting to a 6v system with my R-177. Would the Zamp solar system wiring be compatible to charge (2) 6v batteries instead of (2) 12v batteries?
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2017 RP-177
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JR
Senior Member 
Joined: 31 Aug 2018 Location: Manistee, MI Online Status: Offline Posts: 376 |
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Posted: 22 Dec 2019 at 12:11pm |
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Yes the 2 - 6 volt batteries have to be wired in series the - on one battery to the + on the other battery and the other - & + posts on the batteries to the Pod. This will give you 12 volts and keep the battery amp hours the same for the system. The way the 12 volt batteries were (or should have been) wired were in parallel giving you the same 12volt of each battery but doubling the amp hours of the batteries to the system amp hours. The advantage of using 2 - 6 volt batteries is you can get golf cart batteries, which are much heaver (more lead in them) and therefore can give you more service of electricity. They still should not be run down to or below 50% of fully charged level. Hope this helps
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Jay
179/2019 |
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MattSki
Newbie
Joined: 17 Mar 2017 Location: Truckee, CA Online Status: Offline Posts: 5 |
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Posted: 22 Dec 2019 at 12:13pm |
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Thanks for the info JR
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2017 RP-177
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Olddawgsrule
Senior Member
Joined: 20 Sep 2017 Location: New Hampshire Online Status: Offline Posts: 1014 |
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Posted: 22 Dec 2019 at 2:02pm |
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Matt, changing over really depends on your usage. If your a occasional lot-docker, then a good sized 12v will be fine. If you're a occasional shore-power person (like I) then a 6v system comes into play.
Pro's are: longer, deeper aH. Ya, no matter what the 12v'ers say, a longevity, sustainable system off-grid is a 6v system. Cons: Weight, weight, weight.. Did I mention weight??? The tongue frame on our rPods are not the greatest and this additional weight needs to be thought though. Seriously... what else you plan on the tongue? How are you packed and what is you tongue weight now? I have a dual 6 system now and find I don't need as much as I have. 230ah is far beyond my needs. I do suggest a Power audit and decide from there what you require before investing into any sort of upgrade. Just me, but I'm switching over to a 60ah lithium (lipo4). Very light weight and will give me 2.5 days of autonomy. Between my solar panel (130w) and my B to B charger, I really don't see running out of power. Think about how you camp, how you wish to camp and what do you really need to consume for power. Then decide upon direction. The only mistake we really make... Is not going camping! Happy, safe travels! |
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Colt
Senior Member
Joined: 16 Nov 2019 Online Status: Offline Posts: 383 |
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Posted: 22 Dec 2019 at 11:36pm |
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As stated, the R-pods run on 12V, nominal. Simplistically, A-Hrs comes from battery volume. Two 6v batteries in series provides volume for A-Hrs and sums to 12V. Cool. Two 12V batteries in parallel could also provide the same A-Hrs, but apparently are unavailable in the correct size for the battery rack. PbSO4 batteries charge more completely and fully when all of the cells are in series and all cells see the same current flow. That's why 2-6v in series is better. Two 12v in parallel is not fatal. I use that in my home solar PV system. I would not recommend more than 2 batteries in parallel due to the possibility of uneven discharge and charge rates.
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John
'16 R-Pod 180 |
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MattSki
Newbie
Joined: 17 Mar 2017 Location: Truckee, CA Online Status: Offline Posts: 5 |
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Posted: 24 Dec 2019 at 7:56am |
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Thanks Olddawg for the info
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2017 RP-177
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MattSki
Newbie
Joined: 17 Mar 2017 Location: Truckee, CA Online Status: Offline Posts: 5 |
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Posted: 24 Dec 2019 at 7:58am |
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Thanks Colt for your response.
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2017 RP-177
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ricardos
Newbie
Joined: 26 Dec 2019 Location: Belgium Online Status: Offline Posts: 5 |
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Posted: 27 Dec 2019 at 7:00am |
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Its interesting idea. I think yes. Its be compatible to charge. Maybe this article will be interesting for you https://websolarguide.com/who-manufactures-solar-cars/
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offgrid
Senior Member
Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
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Posted: 29 Dec 2019 at 6:52am |
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It you do wind up with 12V batteries in parallel, the charge/discharge variation between the two batteries can be partially mitigated by taking the positive output from one battery and the negative from the other. Not as good as keeping everything in series but it helps because it keeps the conductor series resistance the same for the two batteries.
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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Jeepinator
Groupie 
Joined: 08 Sep 2017 Location: Seacoast NH Online Status: Offline Posts: 72 |
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Posted: 07 Jan 2020 at 9:06pm |
OD, What did you purchase for the B 2 B charger?
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2018 Jeep Wrangler Willys
2017 179 |
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