My solar node keeps going offline

Systematic diagnosis in order of likelihood:

1. Undersized battery or panel. Goes offline at night or on cloudy days? Review the Solar System Sizing Guide and resize.
2. Panel obstruction. Bird droppings, snow, or vegetation growth. Verify the panel is clean with clear sky access.
3. Charge controller LVD setting. If the low-voltage disconnect threshold is too high, the controller cuts power while charge remains. For LiFePO4: LVD = 3.0V/cell (12.0V for 12V system).
4. Water ingress. Goes offline after rain = water ingress. Inspect all cable glands, connector weatherproofing, and enclosure seals.
5. Thermal shutdown. Sealed enclosures in direct sun reach 70-80 degrees C. Add venting, shading, or a radiation shield.
6. Firmware hang. Check for firmware updates. Enable hardware watchdog if supported.
7. Remote monitoring. Watch battery voltage trend via Meshtastic telemetry. Declining trend = insufficient harvest. Sudden drop to zero = hardware failure.