Want 6v Trojan AGM Deep Cycles - help?

[RoadtripsAndCampfires]

I thnk we are going to go with four 6-volt AGM deep cycle batteries.  

Can those of you experienced at buying these give me an idea of where I should purchase, model # and link to good price?

Thinking about 200-220 amp hours each.

I have spent so many hours trying to figure out parts to this system and now I think I've got the battery part figured out but would feel better running it by this board.

 

[Jedi Clampette]

If you wire them in series, that would be 24 volts, If you wire them in parallel that would be 3 volts or are you going to have two banks of two batteries where you can wire them into a 12v bank?

 

[Jedi Clampette]

if you have two battery banks of 12v how are you going to charge and monitor each bank separately?

 

[B and C]

Two six volt batteries in series gets a big 12V battery. Take the two banks of now 12V batteries and connect them in parallel. One bigger 12V battery.

 

[highdesertranger]

Jedi you can wire four 6v batteries in series and parallel to make a 12v bank.

you wire 2 sets of 6v batteries in series to make two 12v banks then you wire those two banks in parallel to make one large 12v battery bank.

highdesertranger

 

[highdesertranger]

hahaha B and C you beat me to it. thanks. highdesertranger

 

[B and C]

For a change. You are usually the quick draw and can usually explain it better than me.

 

[highdesertranger]

B and C don't sell yourself short. you make a huge contribution to the forum. highdesertranger

 

[Jedi Clampette]

Jedi you can wire four 6v batteries in series and parallel to make a 12v bank.

you wire 2 sets of 6v batteries in series to make two 12v banks then you wire those two banks in parallel to make one large 12v battery bank.

highdesertranger don't think you are right about the wiring, I admit I can be wrong, but when you put batteries in series you double the voltage and when you put in parallel you half it, I see what you are saying you have two 12v battery pack functioning as 12V putting them in parrallel should be half the voltage making it together a 6v battery pack, where is my math wrong?

 

[Jedi Clampette]

Here is a youtube to explain it  if you wire the 4-6v batteries in series in two banks, to do what you want to do you need 4-12v batteries

 

[MrNoodly]

As for where to purchase, where are you? There might be a source we could recommend that's close enough for you to pick them up rather than paying shipping on a couple hundred pounds of lead.

 

[Jedi Clampette]

Here is a youtube to explain it  if you wire the 4-6v batteries in series in two banks, to do what you want to do you need 4-12v batteries

two 12v batteries or battery banks wired in parallel is not 12v, but 6volts, check this out before making the mistake!

 

[AJ452]

Wiring a pair of 12v 100Ah batteries in series yields the equivalent of a 24v 100Ah battery - the volts are added. Wiring a pair of 12v 100Ah batteries in parallel yields the equivalent of a 12v 200Ah battery - the Ah are added.

Please, please reexamine your understanding of series vs parallel wiring and stop with the potentially dangerous false argument that parallel wiring leads to half the voltage!!!! It does not!!!!!!

Sorry for all the exclamation marks.

 

[B and C]

two 12v batteries or battery banks wired in parallel is not 12v, but 6volts, check this out before making the mistake!

I have no idea where you got this tidbit of misinformation.  In the video you cited, two six volt batteries in series made a 12 V battery and not a 3 V battery as you math would indicate.

At the first of the video in the drawings he showed 2 12 V batteries in series making a 24 V battery.

Please do not wire up anything until you have a better grasp of how it works.

 

[highdesertranger]

I watched the video. it's a very good video explain series and parallel, but nowhere in the video did I see what you are saying that wiring batteries parallel halves the voltage. I think you need to watch I again. highdesertranger

 

[sushidog]

It's pretty simple.

Wire 2 batteries (solar panels, etc.) in parallel - the voltage stays the same and the amperage doubles, like wiring 2 - 12v batteries to give you more storage capacity for your 12v system.

Wire 2 batteries in series - the voltage doubles but the amperage remains the same, such as wiring 2 - 6 volt golf cart batteries positive to negative to make 12 volts. If each golf cart battery was 225 amp/hr then you would have a 225 amp/hr 12v battery bank by wiring them in series.

The same concept works with multiple batteries too. I will be wiring 8 - GC-2, 6v batteries in series to make a 48v bank, but the amp hours if this huge bank will only be equal to one 6 v battery.

Chip

 

[Jedi Clampette]

I would suggest that you are absolutely sure about what you are doing even running it by an RV electrician, because making a mistake can cause your death and the death and injury of others. I am concerned for your health and concerned because obviously you know better than anyone else. Bottom line GET AN EXPERT TO VIEW YOUR PLANS!

 

[highdesertranger]

I would trust many on this forum before a RV electrician. factory electrical RV system are a joke for the most part. and yes I am absolutely sure. highdesertranger

 

[RoadtripsAndCampfires]

Jedi you can wire four 6v batteries in series and parallel to make a 12v bank.

you wire 2 sets of 6v batteries in series to make two 12v banks then you wire those two banks in parallel to make one large 12v battery bank.

highdesertranger

Yes, this is what we are going to do.  Michael from Duet Justus does a great video on this.

I found the Trojan website and there are three RE 12v solars to choose from, each with a different amp hour rating and weight.  So now I am trying to figure out what weight and space I have available.

On the roof of the cargo trailer I just figured out I can fit three 300 watt panels giving me 900 watts.  If I want more we will either have to put some on the truck and connect them when needed or get a portable for the ground which might be nice because we could move it around but then again we would have to deal with moving it.

A special thanks to Bob Wells and Jim In Denver for their solar Air Conditioning video.  Together with the notes I got from Michael's videos and a few others I am beginning to list my system needs and figure it out better.  We are going to get rid of the Air conditioner on wheels and go for one like Jim has.  Good thing we have not yet made cut outs for windows and the like. Lots of parts to go on the walls all requiring their own space.

 

[RoadtripsAndCampfires]

As for where to purchase, where are you? There might be a source we could recommend that's close enough for you to pick them up rather than paying shipping on a couple hundred pounds of lead.

I found a drop down link for my zip code and we will be able to pick them up locally.  That will be a great plus.