Doghouse3

Central Pennsylvania

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Joined: 09/23/2006

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I recently purchased the battery tender plus with the intent of charging both of my RV batteries at the same time while in storage. I had them hooked up in parallel as I would in my 5th. I have had the charger on them since last Thursday with no results. I called the company today and they informed me that I would need to purchase a second battery tender plus in order to charge the second battery. Is this correct?
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gouda

NW Wisconsin

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Joined: 02/04/2007

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I believe so. You can look at their web site for more info. I use a dual one for my two chassis batteries. Not enough output for two. Remember these are trickle chargers only.
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FLY 4 FUN

Alberta

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I would save the cost of a second unit, and just alternate charging one at a time. I have twin 6v batts (in series), and a spare 12v that I will charge for a week on/week off and alternate as required. The charger does not need to be on them 24/7 365.
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Doghouse3

Central Pennsylvania

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Daryll,
When I called Deltran they stated that I would need the second b/c the batteries needed to be charged equally. I'm curious as to whether or not anyone else is doing this.
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pianotuna

Regina, SK, Canada

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Hi Doghouse3,
Did you try it on one battery?
Are the batteries low? I'm not sure what "no results" means.
If the wiring is done in a balanced manner both units should charge equally.
Regards, Don
Kustom Koach Class C 28'5" 256 watts solar, 875 amp hours in two battery banks 12 volt batteries 2500 watt inverter.
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wild bill

Mira Loma, Ca. USA

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I have used Battery Tender Plus for years and I own at 4 of them....I have never had a problem hooking them up to more than one battery....My Dodge 3500 Diesel has two batteries and I only use one Battery Tender to keep both charged.....It will take a very long time for the Tender to reach float if both batteries are discharged much....I have used one Battery Tender on my six golf cart batteries in the 5th wheel before I went to solar and that worked just fine also. Again it will take a very long time to charge to float...days even..........
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tvman44

Southwest Louisiana

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You should not need a 2nd unit. I have 2 batteries on my Ford diesel and the battery tender charges both at the same time.
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justlou

Northern, Illinois

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I just purchased a BT Plus for my two 12 volt chassis batteries wired in parallel. Before placing the order I e-mailed Deltran asking if one unit would handle the two batteries. Their response was the BT Plus would be adequate.
justlou
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TN Tarheel

East TN

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I use a "Battery Tender" on my (2) 12v house batteries and have had no problems. They are fully charged when I connect up the Tender, so it is a matter of keeping them charged with just a trickle. A hard charge would be difficult for a "Tender".
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icechip

Manitoba

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Joined: 11/21/2006

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Yes, they will keep 2 batteries charged. I currently have my battery tender connected to six, 2 chassis and 4 house batteries in the motorhome.
Light is green and voltage is 13.5 V.
The trick is to ensure the batteries are fully charged before you connect the tender. This is the second winter I have run with this setup.
I have a jumper cable between the coach and chassis batteries.
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