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Table of Contents

Design

This design requires the battery can supply a higher current.  For this design we will be using 2 100Ah LiFePO4 batteries.


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Fuse Panel (12 Circuit)


FuseSizeUsage
1BED
LED Light (switched off)
2BUNK
LED Light (switched off)
3BUNK PWR
USB Power
4FAN
Fantastic Fan
5PANEL
Under Sink Light
6SINK
Sink Lights (includes remote)
7TV/OUT

2 - 12v DC Sockets

Outdoor Light

8USB
2 USB Ports in 120v Outlet
Inputs
9DC Power In15APower from AC/DC Power Supply
10Solar In25APower from Solar Panel Controller
11Vehicle In7.5APower from Vehicle DC-DC Converter
12Battery In60APower from battery


Components

Solar Charge Controller

Model: ALLPOWERS 20A Solar Charge Controller Solar Panel Battery Intelligent Regulator-Blue

The solar charge controller is responsible for charging the battery from the solar cells.



Q: What battery type is this controller supported?

A: (1)B-01=LEAD-ACID, 12V; B-02=LITHIUM ION 3s, 3*3.7V=11.1V; B03=LIFePO4 4s, 4*3.2V=12.8V. (B01 is the default type, If you would like to to switch to another 2 types, please select it manually.)


Battery TypeDescription
b01Lead Acid
b02Lithium Ion 3S (11.1V)
b03LIFePO4 (12.8v)


We will be using the b03 setting for LiFePO4 4S.

Solar Panel

We have a flexible 100 watt solar panel from AllPower.

Battery

We will be using 2 DIY 100 Ah LiFePO4 Batteries.


Specification

Value

Capacity100 Ah
Nominal Voltage (4 x 3.2v)12.8v
Max Voltage (4 x 3.6v)14.4v
Min Voltage (4 x 2.5v)10v
Cell Configuration4S
Max Current Output100A


DC-DC Converter


The DC-DC Step down converter will be used to charge the battery while driving. The output will be set to a maximum of 14.4v.

https://www.amazon.ca/DROK-Waterproof-Synchronous-Converter-Adjustable/dp/B00CNXLDCQ/ref=pd_rhf_se_p_img_1?_encoding=UTF8&psc=1&refRID=DGQY111E6P888BR14H0A


Capacity Meter

AiLi Battery Capacity Meter

Inverter

Our inverter is a 3000W Motomaster modified sine wave inverter. We don't use a lot of AC and we had this laying around. This inverter in not suitable  for sensitive equipment since it is not a pure sine wave inverter. At some point, I may upgrade to a pure sine wave inverter.

References