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Design

Next Proposal

Due to the limitations of our current battery, we can only supply a maximum of 50A. ThIs will limit what we can run on our inverter. Since we don't use the inverter much at all, this is not critical at the moment.

Ideal

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)

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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.

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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.)

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See Renogy Rover 30A MPPT Charge Controller

We will be using the b02 setting for Lithium Ion 3S.

Solar Panel

We have a flexible 100 watt solar panel from AllPower.

Battery

We will be using a DIY 130 Ah Lithium Ion Battery.2 DIY 100 Ah LiFePO4 Batteries.

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Battery Charger

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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.

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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.

For a battery charger, we will be using the iMax B6 is a rapid charger.

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This charger will safely charge our battery to no more than 12.6v and will shut down after charging. 

Specifications:

Operating voltage range: DC 11-18 Volts
Circuit power: Max. charge power 50W
Max. discharge power 5W
Charge current range: 0.1-5.0A
Discharge current range: 0.1-1.0A
Current drain for balancing Li-po: 300mA/cell
NiCd/NiMH battery cell count: 1-15cells
Li-ion/Fe/Polymer cell count: 1-6cells
Pb battery voltage: 2-20V
Net weight: 277g
Dimension: 133x87x33mm

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 1214.6v4v.

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 (No Longer Used)

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.

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Renogy Pure Sine Wave Inverter

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References