A little earlier every week.
Learning Track · Module 7: Failure library · Step 57 of 101
| Symptom | The light goes off before sunrise. The time gets earlier over weeks. |
|---|---|
| Cause | Battery capacity loss from age or heat, a dirty or shaded panel, or a profile that uses too much energy. |
| Check | Read dawn battery state and daily charge. Compare with nearby units. |
| Fix | Clean the panel or remove shade. Set a deeper dimming profile. Replace the battery if its capacity is low. |
| Prevent | Size for the worst month. Keep batteries out of direct sun. Monitor battery health. |
Sources
- IEC 60364-6 Verification of low-voltage installations
- IEC 61643-11 Surge protective devices
- IEC 60598-2-3 Luminaires for road and street lighting
- Maker installation and maintenance instructions
Changes: 30 October 2026: First publication: guides for Europe, the Middle East, South Asia, and the USA; failure library; tender clause library; comparisons; tools; downloads. See the changelog. Found a mistake? Report it.