Power System

Components

• Power Strip
• Motor Battery System
• Logic Battery System
  • PiSugar Battery
• USB Isolator

24V Motor Battery System

Components

• 2x12V-9AH SLA Batteries
• 24 V 1.5 A Charger W13112099014
• Fuse Holder
• Fuses (procurement pending todo)

Loads

• drive-system 400 Watts???

24 Volt Wire System

DC cable sizing calculator
Voltage (V): 24
Current (Amps): 30
Cable run, including return (m) : 2
Voltage drop (%): 3
Calculated Minimum cable cross section (mm^2): 4
Closest American (AWG) gauge: AWG 11

Motor Battery Specs

• Capacity: 216 Watt-Hours (Nominal)
• Runtime: todo
• 24V SLA Battery System (2x12V-9AH in Series)
• Model: EXP1290
• Terminals: F2 0.25in
• Supplier Link: https://www.amazon.com/dp/B001NJ3H0C
• Pre-Charger
• Emergency Stop
• Cycle use : >260 cyles
• Floating and Standby use : 3-5 years
• Self Discharge 3% per month @ 25 C
• Charge Voltage @ 25C
  • 14.4-14.7 (-30mV/C), max. Current: 2.70A

Charger Specs

• 24V SLA Wall Charger
• Model: W13112099014
• Input AC 100 - 120V 50/60Hz
• Output 24V 1.5A
• UL listed, short circuit, over charge, and over voltage protection
• Supplier Link: https://www.amazon.com/gp/product/B000K0675C/

Logic Battery System

Components

• 12V SLA Battery (procurement pending todo)
• 12V SLA Charger (procurement pending todo)
• 12V-to-5V Step Down Converter
  • Anker Dual USB-A Car Charger
• Fuses (procurement pending todo)
• Estimated Capacity = todo
• (Battery Rated Capacity)
• (Usable Capacity Correction Percentage)
• (Battery Voltage/Converter Voltage)
• (Converter Efficiency Percentage)
• Lead Acid
• Battery Rated Capacity ~= Usable Capacity (~65% of Rated Capacity) (50% of Rated Capacity, in high current applications)
  • https://www.youtube.com/watch?v=lPyDtuzYE5s&t=754s

Loads

• nano ~12.5Watts~
  • Micro-USB Power: 5V 2.5 Amps (Current Configuration)
  • Barrel Jack Power: 5V 4 Amps
• roboclaw (Logic Power) todo
• rpi4 todo
• usb watt meter
• Rate Capacity (amp-hours)

Logic Battery Specs

• Capacity: todo
• Runtime: todo
• 12V SLA Battery Supply
  • Supplier Link: https://www.amazon.com/dp/B00A82A2ZS

12V SLA Wall Charger

• Model: todo
• Supplier Link: todo

Step Down Converter Specs

• 12V-to-5V Step Down Convert
• Model: todo
• Max Current: todo
• Supplier Link: todo

PiSugar2

This UPS is only intended as a power fail safe for the Raspberry Pi in case the 12V logic battery fails

[pisugar](/gardenbot/systems/power-system/pisugar.html)

• Pisugar2 Portable 1200 mAh UPS Lithium Battery
• https://github.com/PiSugar/PiSugar/wiki/PiSugar2
• https://github.com/PiSugar/pisugar-power-manager-rs#unix-domain-socket--webscoket--tcp
• Output Current: 2.4A
• Output Voltage: 5V
• I2C: 0x75(BAT) 0x32(RTC)

CLI

• Fetch battery charge percentage

echo "get battery" | nc -q 0 127.0.0.1 8423

WebUI

Local WebUI access

• Via web browser visit http://192.168.1.22:8421

Remote WebUI access
1. In a terminal enter

 ssh -L 8080:192.168.1.22:8421 proxy8.remoteiot.com

1. Via web browser visit http://localhost:8080/index.html

power_system_requirements_specifications