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Battery + All In One setup in trailer

reddyfire

New Member
Joined
Jun 24, 2021
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I have been following Will, his videos and the forums for quite some time and i have finally finished planning and installing batteries and all in one inverter in my trailer. Below are photos and specs as well as a short story behind it.

Specs
2014 Nash 25c tow behind trailer
30amp AC/DC WFCO panel
13.5k BTU AC
3kw Growatt 3000TL LVM
4 x 12v 100ah SOK Batteries
About 20 feet of 2AWG Battery wire
Champion 3500-Watt Dual Fuel Portable Inverter Generator

Story
We decided we did not want to use the genny all the time while bondocking/dry-camping, so we started exploring options to limit genny use. We concluded that 3000 watts was more than enough for our trailer and that 400ah of capacity should hold us over for at least a couple days of being unplugged. Been planning this upgrade for over a year now and have had everything partially hooked up on my test bench for 6 month or so. Last weekend my 2x100ah Marine lead acid batteries blew up for being too dry, i didnt notice this until we were already out so genny ran non stop and we burned through about 8 gallons of gas in 3 days.

I completely removed the lead acid batteries, cleaned up the wiring at the front of the trailer and decided to put the new LiFePo4 batteries in the rear driver side compartment where the generator would have went if it came equipped with our trailer. This was about 8ft from the WFCO electrical panel and thus made the most sense. I was not excited about running electrical wire under the bath tub/shower that is in between but oh well. I hooked up the batteries in a 2s2p configuration for 200ah of 24v. The negative wire runs through a 100amp shunt with a monitor, the positive wire runs through a 300amp fuse to the inverter. Inverter runs to the electrical panel with a 10-2 solid copper wire for 30 amps of juice. The original 12v converter was kept in place and the transfer switch box was removed since the inverter now accomplishes that function. The original 30 foot wire is now 22 feet because it lives in the same cubby but is connected 8ft through the trailer to the inverter for shore when available.

Update
On it's inaugural trip this system output 4845wh giving a 95% efficiency. Highest amp draw was 91amps at one point.

Pics

The album above has more pictures than what is attached. If you got suggestions or questions feel free to ask!

Plans for future
Add 10x200watt rich solar 24v panels to the roof. Max capacity for the Growatt is 2000watts of solar. 2500$ is a bit spendy at this point for the panels plus i would probably end up spending another 250-300$ on mounting hardware and wiring for this.

Add LED strip lighting to the awning, an LED antenna for locating trailer at night, interior night light soft LED surround strip, i am estimating 200$ for this.

Electric/hydraulic stabilizer feet/jacks, i am estimating 1800$ for this

Simarine PICO Monitor with tank/battery and temp monitoring, 600$

Backup and side cameras for trailer, 800$

Thank you to everyone that actually contributes to this forum and specifically to ekarlson how answered some of my more specific questions i had at one point!
 

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