What does error T3 mean on a Felicity battery?

T3 means: Ungenaue SOC-Anzeige. The battery's SOC has not been calibrated.

Is error T3 a fault or a warning?

T3 is a fault code: the battery enters protection and stops normal operation until it is cleared.

How do I clear or fix error T3?

The SOC will automatically calibrate after one full charge cycle. First, discharge the battery to 0%, then charge it to 100%.

Felicity battery error T3

Ungenaue SOC-Anzeige

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

Ungenaue SOC-Anzeige — Inaccurate SOC display. Maintenance troubleshooting item (no LCD code).

Cause: The battery's SOC has not been calibrated.

How to fix it

The SOC will automatically calibrate after one full charge cycle.
First, discharge the battery to 0%, then charge it to 100%.
Fully charge the battery at least once per month for accurate SOC.

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

Frequently asked questions

What does error T3 mean on a Felicity battery?: T3 means: Ungenaue SOC-Anzeige. The battery's SOC has not been calibrated.
Is error T3 a fault or a warning?: T3 is a fault code: the battery enters protection and stops normal operation until it is cleared.
How do I clear or fix error T3?: The SOC will automatically calibrate after one full charge cycle. First, discharge the battery to 0%, then charge it to 100%.

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.