Can I clear the 20 code myself?

It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.

Is the 20 fix the same on every device?

The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.

Where does this information come from?

Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Fault

20

Q: What does 20 mean on T-REX-3KLP1G01?

Input output reverse. Recommended fix: Confirm that the input and output wiring is correct.

Battery SOC Low Alarm.

3 Devices that report this code

What does the 20 error code mean?

20 on a Felicity unit indicates: Battery SOC Low Alarm.. It is a fault-severity event that can appear on 3 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a fault-severity code

Fault codes stop normal operation but the unit may attempt to recover. Common causes are out-of-range conditions (voltage, current, temperature) that require checking inputs and outputs before restart.

What triggers this code

20 is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

IVGM5KL-P1G1Inverter↗ view on device

20Battery SOC Low Alarm.Fault

Description

Battery SOC is too low, battery should be recharged.

Recommended fix

Recharge the battery.

Source:Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51

LUX-S-1600LG01Battery↗ view on device

20Output overcurrent.Fault

Description

Fault event: total output overcurrent condition.

Recommended fix

Restart the unit. if the error persists, contact the repair center.

Source:LUX-S-1600LG01.pdf · page 22

T-REX-3KLP1G01Inverter↗ view on device

20Input output reverse.Fault

Description

Input output reverse.

Recommended fix

Confirm that the input and output wiring is correct.

Source:T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf · page 38

Frequently asked about 20

What is the 20 error on Felicity?: 20 on a Felicity unit means: Battery SOC Low Alarm.. It can appear on 3 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the 20 code myself?: It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the 20 fix the same on every device?: The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?: Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

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