EPEVER Solar Charge Controller: “All LEDs fast flash — overheating”
warning RV solar charge controller error codes
What it means
When every indicator (PV, battery and the battery-capacity level LEDs) flashes fast at the same time, the controller's internal heat sink is over-temperature. Above ~85 C it cuts both PV input and load output, resuming once it cools below ~75 C.
Most likely causes
- Mounting location with poor airflow or blocked heat-sink fins most likely
- Operating near full rated charge current in high ambient heat or direct sun common
- Dust/debris on the heat sink reducing cooling common
Safe checks you can do yourself
- Check that the controller is mounted vertically with clear space above and below for convection
- Clear dust and debris from the heat-sink fins
- Check ambient temperature and direct sun exposure on the unit; relocate or shade if it runs hot
How to reset / clear All LEDs fast flash — overheating
- Let the controller cool — operation resumes automatically once the internal temperature falls below ~75 C
- Improve ventilation/mounting so it does not recur; note charging power is automatically reduced starting around 81 C before full shutdown at 85 C
When to call a technician
If the controller overheats at low load with good ventilation and normal ambient temperature, it may be faulty — have it inspected.
Applies to
EPEVER Triron N series · EPEVER Tracer-AN series · EPEVER Tracer-BN/BP series
FAQ
What does EPEVER Solar Charge Controller code "All LEDs fast flash — overheating" mean?
When every indicator (PV, battery and the battery-capacity level LEDs) flashes fast at the same time, the controller's internal heat sink is over-temperature. Above ~85 C it cuts both PV input and load output, resuming once it cools below ~75 C.
How do I reset EPEVER Solar Charge Controller All LEDs fast flash — overheating?
Let the controller cool — operation resumes automatically once the internal temperature falls below ~75 C Improve ventilation/mounting so it does not recur; note charging power is automatically reduced starting around 81 C before full shutdown at 85 C
What is the most common cause of All LEDs fast flash — overheating on a EPEVER Solar Charge Controller?
The most likely cause is mounting location with poor airflow or blocked heat-sink fins.
Related · EPEVER solar charge controller
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A steady red battery indicator means the battery is over-dis… Green LED fast flash — battery
The battery-status indicator flashing green at about 4 Hz me… Green LED fast flash — charging
The PV/charging indicator flashing green at about 4 times pe… Load + fault — short circuit
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The load indicator blinking (load off) signals a load overlo…
Sources
- EPEVER TRIRON N Series Modular MPPT Solar Charge Controller User Manual — TRIRON-SMS-EL-V1.2, Section 4.1 — 'All LED indicators fast flashing at the same time = Controller Overheating'; Section 6.1/6.2 (cut input & output above 85 C, resume below 75 C; power derate from 81 C) (EPEVER (Huizhou EPEVER Technology Co., Ltd.))
- MPPT Solar Charge Controller User Manual, Tracer-AN series — Tracer-AN-Manual-EN-V2.6, Section 4.1 — Device overheating: stops above 85 C, resumes below 75 C; power reduction begins at 81 C (EPEVER (Huizhou EPEVER Technology Co., Ltd.))
Note: On Triron DB1/DS-module displays the same condition is shown as the PV/BATT (orange) and battery-capacity LEDs fast flashing; the exact set of LEDs depends on which display module is fitted.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.