Parallel failed.
C13 on a Felicity unit indicates: Parallel failed.. It is a fault-severity event that can appear on 16 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.
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.
C13 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.
Parallel connection failure between battery units. LED pattern: LED1 ON, LED2 OFF, LED3 ON, LED4 ON.
Single unit may be installed to a parallel system, or wiring connection between parallel units is incorrect/incomplete.
1. Check if a single unit is installed to a parallel system. 2. if this error happens during parallel installation, check wire connections; if connected correctly, finish parallel installation first and then restart the unit. 3. if the problem remains, contact your installer.
Felicitysolar FLA12100 12.5Kwh Battery Energy Storage System User Manual.pdf · page 1Parallel installation failed; battery cannot establish parallel communication or balance with other packs.
Improper parallel installation or incorrect wire connections between the battery packs in parallel.
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf · page 13Battery pack failed to establish or maintain parallel operation with other packs.
Single unit may be incorrectly set to parallel system; or wiring between parallel-connected battery packs is incorrect/incomplete.
1. Please check if a single unit is installed to the parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
6peluqppy_66a93554057c8.pdf · page 13Parallel failed.
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
FLA48250-EU_Manual.pdf · page 8Parallel connection / parallel-mode start-up failed.
Parallel condition not satisfied (e.g. pack-to-pack voltage difference ≥3V, or wiring issue between paralleled units).
1. Please check if single unit is installed in parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then Restart the unit. 3. if the problem remains, please contact your installer.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfParallel failed. The battery could not establish a valid parallel configuration with other units.
Parallel-installation error (Fehler im Parallelaufbau): single unit reporting parallel state, mis-wired parallel cabling, or incorrect DIP-switch IDs.
1. Check whether a single unit was incorrectly installed in a parallel system. 2. if the error happens during parallel installation, check wire connections; if connected correctly, finish parallel installation first then restart. 3. if the problem remains, contact your installer. Verify DIP-switch addresses per the DIP code table.
Benutzerhandbuch - Felicity FLS48100SG2.pdfParallel connection / parallel-mode start-up failed.
Parallel condition not satisfied (e.g. pack-to-pack voltage difference ≥3V, or wiring issue between paralleled units).
1. Please check if single unit is installed in parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then Restart the unit. 3. if the problem remains, please contact your installer.
HE-GF-FLA-48500 Manual_20250327_EN.pdfParallel-mode communication / configuration failure displayed on the LCD BMS fault code / flag screen (section 4.4). Applies when the LPBF48100-M is operated in parallel (up to 6 units / 30 kWh per section 2.3).
Single unit installed but the system is configured for parallel operation; or a wiring fault between parallel-connected packs (parallel cable / communication cable / DIP-switch address mis-set per section 4.5). Section 4.5 notes that for parallel operation, battery pack IDs must be set to 1-15 via DIP switches SW1-SW4 and SW5 must be ON for termination on the end pack(s).
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
358-010291-07.pdf · page 9Battery pack could not satisfy parallel-operation conditions (e.g. voltage difference between local and other packs >3V, or wiring issue).
Single unit configured as parallel slave, mis-wired parallel connection, or voltage mismatch (>3V) between paralleled packs.
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
Manual-LPBF48200-H.pdf · page 101. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and t hen Restart the unit. 3. if the problem remains, please contact your installer.
Per the manual: verify whether a single unit is installed in a parallel system; if the error occurs during parallel installation, check wiring connections, complete parallel installation, then restart the unit; if the problem persists, contact your installer.
Felicitysolar LPBF48350 17.5kWh 48V Solar Battery Pack with BMS User Guide.pdfParallel-connection condition not satisfied. Possible causes: (1) a single unit is configured as part of a parallel system; (2) wires are mis-connected during parallel installation.
1. Check if a single unit is wrongly installed to a parallel system. 2. if the error happens during parallel installation, check wires connection. if they are connected correctly, finish parallel installation first, then restart the unit. 3. if the problem remains, please contact your installer.
LUX-E-48100LG03-Lithium-Battery-User-Guide.pdf · page 131. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
LUX-E-48200LG03-Lithium-Battery-User-Guide.pdf · page 13Single unit may be installed to a parallel system, or wiring during parallel installation may be incorrect.
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
LUX-E-48230.250LG03-Lithium-Battery-User-Guide.pdfParallel-mode handshake/operation between battery packs failed.
1. Check whether a single unit is wrongly installed into a parallel system. 2. if error happens during parallel installation, wires may be misconnected.
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
LUX-X-48100LG01-Litium-Battery-User-Guide.pdf · page 17Parallel-mode handshake/operation between battery packs failed.
Either a single unit is wrongly configured for parallel operation, or wires are misconnected during parallel installation.
1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
358-S010024-03LUX-X-48100LG01-User-manual_compressed.pdf · page 23Parallel-connection condition not satisfied. Possible causes: (1) a single unit is configured as part of a parallel system; (2) wires are mis-connected during parallel installation.
1. Please check if single unit is installed in parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then restart the unit. 3. if the problem remains, please contact your installer.
LUX-Y-4828048300LG01-Lithium-Battery-User-Guide.pdf · page 8Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.