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Old 12-11-2016, 07:27 AM   #11
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Location: Clearwater, FL area
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If you are looking to get the most power out of your 3 batteries for your fridge you need to look at how the dealer hooks up your 3 batteries. The most common way that dealers hook up batteries (more than one) is to connect them in parallel and connect the load cables to the battery that is closest to the existing TT cables. it is the most inexpensive and easiest way. They will tell you that there is no benefit to any other methods (the attached link will prove them wrong). The issue with wiring them this way is that the battery that has the load cable on it gets most of the Amp draw and the others need to slowly push their power into the first battery. Same logic holds true for charging. In other words the first battery is doing most of the heavy duty work.

You have 2 additional choices of hooking up your 3 batteries. The 2nd choice (much better that the above method) is to hook the 3 batteries in parallel, and connect the TT's Positive cable to the positive terminal of battery #1 and the Negative cable to battery #3. This makes the current draw/charge go through all 3 batteries, but of course it is not the BEST method. This method is the best for hooking up (2) 12 Volt batteries.

The last and BEST method for hooking up your 3 batteries (or more) is to take short battery cables of equal length from each battery terminal (3 positive cables and 3 negative cables), connect the 3 Positive cables to the Positive TT's Positive cable, then connect the 3 Negative battery cables to the TT's Negative cable that is connected to the TT's frame. This charges and drains each battery almost equally.

So now that you are totally confused here is a link to some diagrams an the TEST results of using these methods over the common way of hooking up your batteries.



SmartGauge Electronics - Interconnecting multiple batteries to form one larger bank

Also, here is a link to our RVing with SOLAR social group here on the forum. There is a lot of SOLAR and BATTERY information here.


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Old 12-11-2016, 09:03 AM   #12
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Location: Sparta, TN
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Just my opinion but I would only consider a residential refrigerator IF I knew that 100% of my trips would be with electric hook ups. And the ONLY other time the refrigerator would be operated is while in tow. They are simply too much of a energy hog to expect batteries to support it anything beyond being stopped for lunch while on the road.

Chuck - Sparta, TN
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Old 01-08-2017, 09:36 AM   #13
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Location: Boalsburg
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Thanks for the advice. After living in our unit for a month now we are very happy to have gone with the residential frig. We have only had two issues with it. One it was not leveled and I had to unscrew the top bracket and level it. I thought this was causing the other problem, which was if you let go of the refrigerator side door, it would slam into the glass pantry door. But even when it is plumb, the handle on the door will hit the glass on the pantry door if you open it a little past 90 degrees open. We have a piece of foam noodle on the handle now so we don't break the glass door, until i devise a stop for the refrigerator door.
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Old 01-08-2017, 09:43 AM   #14
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thanks for the great info on the battery hook-up. I will be using the info to redo the hook-up when I add the fourth battery that Camping World left loose in the unit, when I picked it up. We have only been on battery power for about four hours so far and the three batteries have preformed well, so I am confident that four will meet all our needs.

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