Solar · Error codes · SolaX Power
BMS_Circuit_FaultSolaX Power · Triple Power T Bat Hv S
BMS_Circuit_Fault on a SolaX Power Triple Power T Bat Hv S: Circuit fault of BMS. Solution: Restart BMS; contact after-sales
Short answer
On a SolaX Power battery, BMS_Circuit_Fault means: Circuit fault of BMS. Solution: Restart BMS; contact after-sales. The battery stops until the fault clears or is reset.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Circuit fault of BMS. Solution: Restart BMS; contact after-sales.
Part involved: T-BAT SYS-HV BMS.
Is it safe?
| Does the battery stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
The battery stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: Restart BMS (installer-guided).
What you can check
- Read and note the exact code or light pattern and the time (photo or app screenshot). (the BMS message shows on the SolaX inverter screen or SolaX Cloud).
- Check the battery/inverter AC isolator and the consumer-unit breaker are ON. Do not keep resetting a breaker that trips again straight away.
- Check the monitoring app shows the system online and the home Wi-Fi/router is working.
- SolaX's first step is 'Restart BMS' - ask your installer; restarting the battery uses the POWER button and switches on the battery and should follow their instructions.
- Never open the battery, inverter or gateway casing and never touch DC cables, connectors or battery terminals.
- If the code stays or keeps coming back, contact your installer (quote the code) - do not keep power-cycling.
What the engineer will check
- Restart BMS via POWER button/switch sequence; check BMS-inverter CAN cable and series box; check module firmware/type match; contact SolaX after-sales.
Who to ask for: battery storage installer.
Certification: SolaX-trained installer ('skilled worker' per manual); MCS battery certification.
What you might notice
Sources
- T-BAT-SYS-HV-S25 / T-BAT-SYS-HV-S36 User Manual, Version 16.0 ↗ · 16.0 · page 47-49 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026