Design
Wiring Batteries
Components
2 × 100 Ah batteries (100 A max output each)
1 × 280 Ah battery, BMS-limited to 100 A
Total battery bank capacity: 400 Ah
Max combined current: ≈300 A
Inverter: 3000 W (≈250–280 A draw at 12 V)
Shunt: Victron SmartShunt 500 A
Strategy
| Connection | Recommended Wire |
|---|---|
| Battery → Bus Bar (each battery) | 4 AWG, fused at 100–125 A |
| Bus Bar → Inverter (main negative) | 2/0 (carries full inverter current) |
Fuse Panel (12 Circuit)
| Fuse | Fuse Size | Wire Size | Usage | Notes | |
|---|---|---|---|---|---|
| 1 | TV/EXT LIGHT | 10A | 14 AWG | 2x 12v DC Sockets in cabinet Porch/Outdoor Light | |
| 2 | KITCH USB | 10A | 14 AWG | 2 USB Ports in 120v Outlet | |
| 3 | CAR IN | - | 10 AWG | Car Input <NOT USED> | |
| 4 | SOLAR (30A) | 35A | 12 AWG | Solar Input | Undersized wiring for 30Amps Reduce fuse to 25A or wire with 10 AWG |
| 5 | CHARGER (20A) | 35A | 12 AWG | Charger/DC Input | Should be 25A Fuse |
| 6 | BAT IN | 35A | 10 AWG | Battery Input | Should be 30A Fuse |
| 7 | FRIDGE | 15A | 14 AWG | Fridge | |
| 8 | FAN | 10A | 14 AWG | Fantastic Fan (16 AWG) | |
| 9 | SINK | 5A | 14 AWG | Under Cabinet Lights 4 lights - 26AWG | |
| 10 | UPPER LIGHTS | 5A | 14 AWG | Reading Lights (Right/Left) | |
| 11 | UNDER SINK | 5A | 14 AWG | Lower Cabinet Interior Light (Under Sink) | |
| 12 | BUNK POWER | 15A | 14 AWG | Lower Cabinet USB Power (Right/Left) |
See Wire Sizing
Components
Batteries
We will be using:
- 2x 100 Ah LiFePO4 batteries (DIY) - LiFePO4 100Ah Battery Build
- 1x 280 Ah LiFePO4 battery (Eco-Worthy) - Eco Worthy LiFePO4 280Ah Battery
Battery Charger
WAOUKS 14.6V 20A Charger 4 Series 12V LiFepo4 Battery Charger Smart Charger Aluminum Case with Cooling Fan for 4S 12V 12.8V LiFepo4 Battery Pack.
Specifications:
Product Name: 14.6V 20A Charger
Model: WA360-14620B
Dimensions: 180x90x63mm
Product Weight: 1.4 kg
Color/Material: Black/Aluminum Case
Suitable for Battery type: 4S 12V 12.8V 14.4V LiFepo4 Battery Pack
AC Input: 100~120Vac, 50/60Hz
Output Voltage: 14.6 Volt
Output Current: 20 Amp
Battery Protection: SCP,OVP,OCP,OTP
Charging Mode: Constant current - Constant Voltage - Trickle: Three-stage intelligent charging
Charging efficiency: ≥90%
Working temperature: -5 ℃ ~ +40 ℃
Storage temperature: -40 ℃ ~ +70 ℃
AC power cord, DC connector can be customized.
Operating Instruction
1. Before charging, please connect the DC terminal to battery first, and then connect the AC terminal.
2. After charging complete, unplug the AC terminal firstly, and then unplug the DC terminal.
3. No charging or after charging complete, be sure to unplug the DC terminal and AC terminal.
LED Indicator:
LED 1 red: Power on.
LED 2 red: Battery being charged.
LED 2 Flash: Battery will be charged completely soon.
LED 2 green: Battery has been charged completely.
Renogy Pure Sine Wave Inverter
See Renogy 12V 3000w Pure Sine Inverter
Victron Energy Shunt
Solar Charge Controller
See Renogy Rover 30A MPPT Charge Controller
Solar Panels
We have a flexible 100 watt solar panel and 2 rigid 100 watt panels.
References
| Reference | URL |
|---|---|
| Renogy 3000W Pure Sine Wave Inverter | |
| Mastercraft Inverter User Manual |