EPDM Coatings
rvupgradestore.com Composet Products PO Box Zone
Over The Network Custom Yacht Interiors

Author Topic: Battery Charging with 6 volt batteries  (Read 24039 times)

thebigitalian

  • Posts: 1
Battery Charging with 6 volt batteries
« on: April 03, 2005, 08:19:47 PM »
We have a new travel trailer that came with two 6 volt batteries instead of 12 volt.  What is the proper way to hook up the battery charger to the 6 volt batteries which are wired in serial?

Thanks for your help.

Cris and Catherine

Steve, CDN

  • ---
  • Posts: 2389
  • VA3VH
    • The Pallys
Re: Battery Charging with 6 volt batteries
« Reply #1 on: April 03, 2005, 08:41:23 PM »
When batteries are wired in series, battery #1 negative is connected to positive of battery #2.  Therefore if you place a volt meter on positive of battery #1 and negative of battery #2 the voltage is 12VDC.   Your 12 volt charger would be conncted to positive of battery #1 and negative of battery #2, the same poles where your reading would be 12VDC.

Series connection adds the voltage of each battery to the other.
Steve, Forum Moderator
Home Page
My Polar Bear Mural

Karl

  • Former Staff
  • ---
  • Posts: 5154
  • No Brett; no sweat. A QB's not the whole team.
Re: Battery Charging with 6 volt batteries
« Reply #2 on: April 03, 2005, 09:16:03 PM »
Steve and Cris,
Let me clarify a little bit if I may: You won't find one battery marked #1 and the other #2. What you will find is two batteries connected by a large jumper cable; one of them will have it's plus (+) terminal going to the minus (-) terminal of the other battery. You can ignore this cable and the two battery posts this cable is connected to. However, each of the batteries will have another terminal and a cable attached to it. These are the terminals you want to connect your battery charger to; plus (+) from the charger to plus (+) on the battery, and negative (-) on the charger to negative (-) one the other battery. Even if you could find a 6-Volt charger these days, resist the temptation to charge each one individually. Batteries charged in series (as they are in connected in your coach) will only charge to the capacity of the weakest battery, thus ovoiding an imbalance between them. If you have 'flooded cell' batteries, i.e. those that have removeable caps, charge them as per above and then check and record the specific gravity of each cell in each battery with a hydrometer (available at Fleet Farm, Home Depot, Wal-Mart, etc.). These readings should be very close to each other. If not (one cell in the battery is quite different from the others), It's time to replace it. You may also want to have a service station do a 'high amperage load test' to determine the batterys' health. I believe this is the only way you can test AGM or sealed batteries, but someone else may have comments on that. Hope this helps. :)
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Lou Schneider

  • Forum Staff
  • ---
  • *
  • Posts: 7312
Re: Battery Charging with 6 volt batteries
« Reply #3 on: April 04, 2005, 01:25:49 AM »
When you connect two 6 volt batteries in series to get 12 volts, you've made a single 12 volt battery out of them.   Treat the pair as if they were a single 12 volt battery.

If you want to use an external charger, connect it's leads to the posts where the trailer wires connect.  Ignore the posts that simply connect one battery to the other.
« Last Edit: April 04, 2005, 01:28:42 AM by Lou »

Steve, CDN

  • ---
  • Posts: 2389
  • VA3VH
    • The Pallys
Re: Battery Charging with 6 volt batteries
« Reply #4 on: April 04, 2005, 11:53:22 AM »
Lou,

Your explanation is the clearest and most concise way to describe series connections of batteries I have heard.  Thanks for posting that!
Steve, Forum Moderator
Home Page
My Polar Bear Mural

Ron

  • Former Staff
  • ---
  • Posts: 18087
Re: Battery Charging with 6 volt batteries
« Reply #5 on: April 04, 2005, 01:15:27 PM »
When you connect two 6 volt batteries in series to get 12 volts, you've made a single 12 volt battery out of them.   Treat the pair as if they were a single 12 volt battery.
If you want to use an external charger, connect it's leads to the posts where the trailer wires connect.  Ignore the posts that simply connect one battery to the other.

Excellent discription Lou.  Very clear and understandable.
Ron & Sam-home is where we park it. Currently located   HERE

Karl

  • Former Staff
  • ---
  • Posts: 5154
  • No Brett; no sweat. A QB's not the whole team.
Re: Battery Charging with 6 volt batteries
« Reply #6 on: April 04, 2005, 06:11:34 PM »
Steve,

Geez, what did you expect? I did a stint as a tech writer and we got paid by the word ;D
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Steve, CDN

  • ---
  • Posts: 2389
  • VA3VH
    • The Pallys
Re: Battery Charging with 6 volt batteries
« Reply #7 on: April 04, 2005, 08:36:28 PM »
Karl,

We appreciate having your expertise available to our Forum members.  Thanks
Steve, Forum Moderator
Home Page
My Polar Bear Mural

 

Hosted by Over The Network