Is error T7 a fault or a warning?

T7 is a fault code: the battery enters protection and stops normal operation until it is cleared.

Felicity battery error T7

Battery shows charging but SOC does not change

Fault — the battery enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.

FLS48100SG2

BatteryFault

What it means

Battery shows charging but SOC does not change — The battery indicates it is charging, but the SOC does not change. Maintenance troubleshooting item (no LCD code).

Cause: The ambient temperature is too low, preventing the battery from charging (Umgebungstemperatur zu niedrig, Laden blockiert).

How to fix it

Charge the battery in an indoor environment that meets the operating temperature range specified in the manual (charging range 0 deg C to +55 deg C).

Source: Benutzerhandbuch - Felicity FLS48100SG2.pdf, p.27

Frequently asked questions

What does error T7 mean on a Felicity battery?: T7 means: Battery shows charging but SOC does not change. The ambient temperature is too low, preventing the battery from charging (Umgebungstemperatur zu niedrig, Laden blockiert).
Is error T7 a fault or a warning?: T7 is a fault code: the battery enters protection and stops normal operation until it is cleared.
How do I clear or fix error T7?: Charge the battery in an indoor environment that meets the operating temperature range specified in the manual (charging range 0 deg C to +55 deg C).

Related error codes

Other codes on the FLS48100SG2

All FLS48100SG2 codes

Prefer the full written guide? Read the complete Felicity inverter error-code guide

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.