Fault

12

PV2 overcurrent.

5 Devices that report this code

What does the 12 error code mean?

12 on a Felicity unit indicates: PV2 overcurrent.. It is a fault-severity event that can appear on 5 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

12 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.

LUX-S-1600LG01Battery↗ view on device
12PV2 overcurrent.Fault
Description

Fault event: PV input channel 2 current exceeded its limit (max input current 30A per MPPT).

Recommended fix

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

Source:LUX-S-1600LG01.pdf · page 22
LUX-X-96050HG01Battery↗ view on device
12Soft Start Failed.Critical
Description

Pre-charge / soft-start sequence failed during system power-up.

Cause

Pre-charge circuit failure, excessive inverter capacitance, or external short on output.

Recommended fix

Restart, if the fault still exists, contact our engineer.

Source:LUX-X-96050HG01-Lithium-Battery-User-Guide.pdf · page 21
LUX-Y-48100HG01Battery↗ view on device
12Soft Start Failed.Fault
Description

Pre-charge / soft-start sequence failed during power-up.

Recommended fix

Restart, if the fault still exists, contact our engineer.

Source:LUX-Y-48100HG01-Lithium-Battery-User-Guide.pdf · page 20
LUX-Y-48100HG01MNBattery↗ view on device
12Soft Start Failed.Fault
Description

Soft Start Failed.

Source:LUX-Y-48100HG01MN User manual 358-S010025-03 0325(V2.0).pdf · page 27
SCCM3024-IIICharge controller↗ view on device
12Relay is short.Critical
Description

The internal relay has a short-circuit fault.

Cause

Internal relay hardware failure, where the relay contacts have welded or shorted closed.

Recommended fix

1. Restart the charger. 2. if the problem remains, please contact your installer.

Source:felicitysolar SCCM-III MPPT Solar Charge Controller User Guide.pdf · page 18

Frequently asked about 12

What is the 12 error on Felicity?
12 on a Felicity unit means: PV2 overcurrent.. It can appear on 5 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the 12 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 12 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.