Estimating battery life for solar IoT node — sanity check sa numbers ko

Wall adapters, batteries, regulators, charging circuits, solar setups.
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jhon_iot
Posts: 4
Joined: Tue May 05, 2026 11:39 am

Designing a remote weather station for a client. ESP32 + BME280, transmits via WiFi every 15 mins, deep sleep in between. Power: 6V 2W solar panel, 18650 cell with TP4056 charger.

My napkin math:
  • ~150mA active for 30s every 15 mins
  • ~10µA in deep sleep
  • Average draw ~5mA over 24 hours
  • 18650 (~3000mAh) lasts ~25 days standalone (no solar)
Should run indefinitely on solar in PH conditions, with battery covering cloudy days. Sino dito may successful long-term solar IoT deploy? Curious about real-world numbers, both nasaktan kayo ng what?
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