Battery Box 4Runner

Just wanted to share my almost finished project of battery box for my Engel Fridge and for Powering my Square Drop Camper. I wanted to make a battery box that could be removable, to be able to still use 1 of the 3rd row seat and keep the vehicle as stock as possible. This is my daily vehicle drive and I didn’t want to carry all week the load. I have learned from so many people posting youtube videos, forum threads that hopefully some one would find this content valuable.


First step was connecting the 6 AWG wires from the battery to the rear driver side of the trunk. Starting from a

$27 Blue Sea Systems 5191 Fuse Block Terminal 30-300 AMP

fuse attached to the starter battery terminal, then to the

$14 Nilight - 90015A Battery Switch 12-48V Waterproof Heavy Duty Battery Power Cut Master Switch Disconnect Isolator for Car Vehicle RV and Marine Boat (On/Off),2 Years Warranty

kill switch, then through the firewall of the car through the kick panel and side panels of the vehicle to reach the trunk with a

$17 micrl 10 Pcs 6-8 Gauge 50 Amp Battery Quick Connect/Disconnect, Jumper Cable Plug Connector Kit for Recovery Winch, Forklift, Towing Systems(Red)

red Anderson connector.



The battery box is made of wood and has

$23 2 Pack 12V USB Outlet Wired Charger Multi Port, Dual PD3.0 USB-C and Quick Charge 3.0 Car Port Socket with Power Switch, Fast Charger for Cell Phone Tablet, Suitable for Car Boat RV Marine ATV

2x USB chargers,

$7 Cigarette Lighter Socket Car Marine Motorcycle ATV RV Lighter Socket Power Outlet Socket Receptacle 12V Waterproof Plug by ZHSMS

2x cigarrette sockets (1 for powering Engel Fridge), 1x

$10 GDSTIME 4500RPM 8cm 80mm x 80mm x 25mm 12v Big Airflow High Speed Dual Ball Bearing Brushless DC Cooling Fan 2 Pin

cooling fan connected to a 1x

$10 HiLetgo 2pcs W1209 with Case 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Temp Control Module Switch with 10A One-Channel Relay and Waterproof

thermostat,

$340 RENOGY 12V/24V 50A DC to DC Battery Charger with MPPT Battery Charger, IP67

1x Renogy DCDC Charger,

$470 Renogy 2PCS 12V 100Ah Mini Size LiFePO4 Lithium Battery, 100A BMS for Ultimate Safety, Deep Cycle Remote Monitoring, Backup for RV, Cabin, Marine, 200ah LiFePO4 Lithium Battery - Core Series

2x 100ah Lithium Batteries connected in parallel,

$37 AiLi Voltmeter Ammeter Voltage Current Meter Voltmeter Ammeter 100V 350A Caravan RV Motorhome 999 AH

1x voltmeter for monitoring charge,

$22 MOFEEZ Power Distribution Block Bus Bar, 4 x 3/8" Posts, 6 x #8 Screws Terminals, Max 48V 250A (Pair, Red & Black)

2x busbars,

Renogy Set w Holder + 80A ANL Fuse

fuses,

SOYOND 6-Way Upgraded With 2 Positive Terminals Waterproof Fuse Block,fuse Box With LED Indicator Damp-proof Cover 12 Circuits With Negative Marine Fuse Block For Dc 12/24v Automotive Boat RV Truck

fuseblock and a killswitch. It also has input for solar charger (future upgrade) and output for connecting my square drop camper to power the MAXX Air fan (+ other stuff that I might upgrade such as lights and water pump). I used some wires to attach the box to the vehicle as seen in the pictures.




I am very happy with the build, learned a lot from all the internet sources and did it by my self. Hope that this is useful for someone that needs something removable and fully capable for delivering amps to their campers.

 

Nice writeup. Welcome to the forum.

 

welcome

 

Welcome

 

That’s slick. Nice job

 

Welcome from Denver

 

That works out to 2.4 kWh capacity, more than the 1.87 kWh traction battery in the 6th gen iForce Max hybrid?

 

Welcome from Arizona!
Looks great.