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Old 09-20-2016, 09:13 PM   #1
kwoodrg's Avatar
Join Date: Sep 2015
Posts: 81
Battery Wiring

We still have a two battery system in our Trilogy, but I've been reading up on the best way to wire batteries for the longest life recently and discovered that ours had been wired wrong for a two battery system.

Batteries must be wired differently depending on how many batteries make up your battery bank. For a two battery system you take the positive off of one battery and the ground off the other battery and those go to your camper. Then you cross connect the two batteries in parallel.

This distributes the "pull" of energy from the batteries evenly across the two batteries.

Ours had been wired where the two batteries were wired in parallel but the positive and ground came off of one battery and went to the camper.

I moved the camper positive to the other battery and checked the water levels.

I have attached a photo of how ours is now that I've properly wired the batteries to the camper.

Click image for larger version

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2014 Dynamax Trilogy 37BH
2015 Ram 3500 DRW
2014 Dynamax Trilogy 37BH
2015 Ram 3500 DRW
kwoodrg is offline   Reply With Quote
Old 09-21-2016, 12:58 PM   #2
Senior Member
Join Date: Jun 2009
Location: SW Oklahoma
Posts: 263
I had my dealer install 4 batteries when I purchased the Trilogy. He too wired the batteries incorrectly. I found this out while adding an AMP meter to the battery bank to monitor charge/discharge. I rewired mine as well. Seems to hold a charge better since it is not pulling everything from the one battery.

After our disaster in Texas with the storm, all of my batteries were replaced. They had tipped slightly during the incident and dumped acid on my hydraulic lines running through the battery compartment. The hydraulic lines had to be changed as well since the acid was eating through them.

Glad you discovered this and corrected it. Makes you wonder how many others have the batteries wired incorrectly.

Also looks like our battery compartments are different sizes. I think I could get at least 6 batteries in mine.

2014 Dynamax Trilogy 3850RL - South Hampton Interior, Full Body Paint (Black / Silver / White), MOR/ryde Independent Suspension, MOR/ryde Disc Brakes, ONAN 5500 Generator, Progressive Industries HW50C w/Dual Display, Winegard HD Dish w/DirecTV, Washer & Dryer, iSprings 7-stage Reverse Osmosis Water Filter, Trail-Air Flex Air Pin Box, Third AC installed, AC Voltage/Amp Meters, DC Amp Meter, Garnett See Level Tank Sensors, TST 507 TPMS
Retired USAF - Full Timers!
John Hagen is offline   Reply With Quote

battery, wiring

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