Good Sam Club Open Roads Forum: 2 Battery banks built from 6 volts
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Open Roads Forum  >  Do It Yourself Modifications and Upgrades (DIY)

 > 2 Battery banks built from 6 volts

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Canuck_in_NJ

Vancouver

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Posted: 10/14/19 08:32pm Link  |  Quote  |  Print  |  Notify Moderator

Hi all, I did a quick search of the forum but couldn't find what I was looking for.

I have a 2018 17ft Jayco travel trailer. The majority of our camping is in the middle of nowhere. (boondocking) The trailer came with One 12 volt however, we swapped that out for two 6 volts from Costco.

We have One 100watt solar panel on the roof that charges the batteries through an 8 amp pwm charge controller. (plan on getting another 100watt panel this spring)

A 1000 watt inverter that is really only used to run a small tv/charge iPhones etc..

We have a 2000 watt Honda generator that we use to run the microwave and top up the batteries if needed.

I want to get another two 6 volt batteries however the space on the tongue is extremely limited. (can just fit the current batteries as it is) I do not want to store them inside due to the obvious hazard of that (and space is limited)

My thought is to install the 2 other 6 volts in the bed of my pick up, and have them as a separate second bank.

I have attached a rough drawing of our current electrical setup.

I know that if I do this I will need to use a battery selector switch and ample sized wire for to voltage drop.

Maybe I am over thinking this but exactly how would I wire this up?

My plan wouldn't be to run them on the 1+2 ever, but have the selector switch on 1 (batteries on tongue) and then when needed switch the selector to 2 which would be the batteries in my truck box.

Perhaps where I am getting hung up is how would they all charge? If the selector switch was selected to 2 (the batteries in the truck) and I fired up the generator, would that just charge those batteries? If the switch was on selector 1, would the generator just charge the trailer batteries?

How would I have it wired in order for the solar to charge the batteries?


I hope my question makes sense?

I have attached a picture at this link: [image]
[image]Click For Full-Size Image.

Please shed some light. Thanks so much,

Greg


2012 Dodge Ram 3500
2018 Jayco 17BH

ndrorder

Southwest

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Posted: 10/14/19 09:19pm Link  |  Quote  |  Print  |  Notify Moderator

Is there room above current batteries to add a second tier then wire in the 2 series sets in parallel. Benefits are one disconnect for all. No switches, and no complex charging configuration.


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miatared

Whitby, Ontario

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Posted: 10/14/19 09:25pm Link  |  Quote  |  Print  |  Notify Moderator

One suggestion: you should switch to an MPPT solar charger/controller, you would have better performance. They're pretty cheap nowadays.

time2roll

Southern California

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Posted: 10/14/19 09:30pm Link  |  Quote  |  Print  |  Notify Moderator

Get them all together on the tongue. Slap some angle steel down or grab a long aluminum storage box. Maybe someone will share a picture of their set up.


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Canuck_in_NJ

Vancouver

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Posted: 10/14/19 09:31pm Link  |  Quote  |  Print  |  Notify Moderator

miatared wrote:

One suggestion: you should switch to an MPPT solar charger/controller, you would have better performance. They're pretty cheap nowadays.

plan on doing that when I get the second panel!

Lwiddis

Kern County, CA

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Posted: 10/14/19 09:36pm Link  |  Quote  |  Print  |  Notify Moderator

Have you completed an energy use survey? Then you can buy what you need instead of guessing. And a generator is wasteful for “topping off” your batteries...absorption phase. Does ok for bulk charging however.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


Canuck_in_NJ

Vancouver

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Posted: 10/14/19 09:39pm Link  |  Quote  |  Print  |  Notify Moderator

[image]

not a tone of room on this small tongue, but angle iron might be the trick. Didn't want to put a ton more weight on the tongue, but may be easier than the truck box.

mobeewan

Hampton, Va

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Posted: 10/15/19 02:08am Link  |  Quote  |  Print  |  Notify Moderator

It looks like you may have enough room to remove the two batteries on the tongue and add a truck bed rail storage box across the top of the tongue for all 4 batteries to fit inside of.

JRscooby

Indepmo

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Posted: 10/15/19 05:29am Link  |  Quote  |  Print  |  Notify Moderator

My thoughts. A big bank in truck, charged thru a truck alternator. Long, heavy cables to the trailer. A smaller battery on trailer, that could be plugged in when the one in truck is unplugged.
We use the pickup often for sightseeing, so the batteries in truck would be re-charged often. While sightseeing, nobody in camper, so low demand for power, take long time to discharge...

theoldwizard1

SE MI

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Posted: 10/15/19 07:18am Link  |  Quote  |  Print  |  Notify Moderator

Let's back up for a minute ! Why do you want to double your battery storage. Running a TV and some USB chargers seems like a pretty light load.

To me it sounds like you need more solar panels and maybe a better charge controller, not more batteries.

A NOCO HM426 dual battery box takes up less space.

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