Skip to content

Source note: Building a solar-powered LoRa Meshtastic community network

Raw path: raw/processed/2026/building-a-solar-powered-lora-meshtastic-community-network.md

Summary

Blog-style piece on designing solar Meshtastic repeater infrastructure: Heltec WiFi LoRa 32 (v3) vs RAK4631 power tradeoffs, EU-oriented airtime assumptions (~0.1 W average for ESP32 without BT/screen/GPS), sizing panels and 18650 charging (rule of thumb ~10 Wp per 10 Wh for ~3 h full recharge), CN3791/CN3163/TP4056 charge-controller notes, regulator dropout affecting usable battery capacity, and measured Heltec + INA219 router consumption (~0.046 W at 5% airtime). Warns that a particular 4 W panel’s protection IC may sit on the solar path only—battery-side undervoltage protection may still be required.

Claims worth carrying forward

  • Repeater role extends coverage without advertising presence; pairing a SENSOR node on shared power can surface repeater health while keeping the repeater “invisible.”
  • Solar sizing must respect cell max charge current, not just panel wattage.
  • Community references: MQTT-backed node maps, regional deployments (e.g. Ukraine 433 MHz mesh), Austin Mesh, Iffy Books resources.

Downstream pages