Compact RAK19003 Mount for Solar MPPT Modules

📄 Meshtastic Node Bracket for 150 × 100 × 70 mm IP67 Case

✅ Compatibility

• Case Fit: Specifically designed for the 150 × 100 × 70 mm IP67 enclosure from Aliexpress I recommand using as it is the go to case for outdoor applications. IP67 Waterproof Transparent Cover Enclosure Juction Box ABS Plastic Outdoor power distribution box Electronic Instrument Case - AliExpress

This type of enclosures is preferred due to its secure top and bottom lids, which protect the internal sealing from mechanical stress — especially important in outdoor setups.

• Board Compatibility: Mounting points for the RAK19003 mini base board with RAK4631 RF module and options for 3 different MPPT chargers and 2 different current sensors.

🧩 Design and Functionality

• Sensor Mounting:
  • INA219 1-channel current sensor
  • INA3221 3-channel current sensor
• Solar Charging Support: Compatible with popular low-power MPPT solar chargers:
  • Waveshare Solar Power Manager (A) (6V min)
  • DFRobot Solar Manager V1.1 (5V)
     
  • (Note: Waveshare (D) is not recommended due to current draw up to ≤30 mA and an incompatible battery holder that does not fit into the case.)

🔧 Mounting Details

• Battery Compartment: Space beneath the bracket accommodates up to 3× 18650 Li-ion cells (following the approach by @Jimmy_67261, check out his collection).

🛠 Recommended Print Settings

• PETG due to temperature stability
• 30% infill w support

🌦 Use Cases

• Outdoor Meshtastic node with solar power supply.
• Weatherproof installation with IP67 protection.
• Reliable performance even in poor weather, powered by a suitable solar panel and 3× 18650 batteries.
• Works best with a 67° solar panel mount, designed for optimal winter performance (+15° langitude offset).

📋 Materials List for interior

• RAK19003 Mini Base Board + RAK4631 RF module + antenna
• Suitable solar charge controller (check required voltages first)
• cables to connect
• 150 × 100 × 70 mm IP67 case
• Batteries as required

Optional:

• INA219 or INA3221 current sensor (if required)

Note: If you choose the DFRobot Solar Manager V1.1, make sure to add a heat sink to the module to ensure stable operation under continuous sunlight.

🔗 Related Models in My Collection

• 67° Solar Panel Mount for Winter Use:
  Solar mount with 67° inclination for winter sun (suitable for 11 mm photo threaded screw) | Printables.com
• Check out my other Meshtastic-related designs on my profile as well as the pole mount created by Rinodods.

Technical Data Reference

• Waveshare:
  Solar Power Manager, Solar Power Management Module, for 6V~24V Solar Panel
• DFRobot:
  Solar Power Manager 5V - DFRobot
• Texas Instruments current sensors
  • NA219 data sheet, product information and support | TI.com
  • INA3221 data sheet, product information and support | TI.com
• RAKwireless: 

RAK19003: WisBlock Mini Base Board - Carrier for WisBlock Core MCU module

Additional Info

See the attached reference pictures for hardware placement and internal layout — more to follow soon. 

If you're interested in remixing or customizing the bracket, feel free to reach out — I’m happy to share the 3MF or Fusion 360 files upon request.

🔀 Differences between the Models

The idea for the design is originally based on the model from @Jimmy_67261. However, since I'm using a different IP67 enclosure and a different hardware setup — specifically the RAK19003 mini PCB with the RAK4631 — I created a custom bracket to match my requirements.