BMS error:XXX on a Growatt SPH 3000-6000TL BL-UP: BMS report error - check the battery's own manual for the XXX code
Short answer
On a Growatt battery, BMS error:XXX means: BMS report error - check the battery's own manual for the XXX code. The battery keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: BMS report error - check the battery's own manual for the XXX code.
Part involved: Battery BMS internal protection/fault.
Likely causes:
- check the battery's own manual for the XXX code.
Is it safe?
Switch the battery off at its isolator if the code comes back.
| Does the battery stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The battery keeps running with some functions stopped.
Resetting itself: protection states may clear when conditions normalise; hardware faults do not.
Manual reset: installer/manufacturer.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Do not open the battery. If it is hot, swollen, smoking or smells, keep away, switch off at the AC isolator if safe and call the installer (and 999 if fire).
- Growatt's manual says 'restart inverter'. A homeowner can switch the inverter off and on at its AC isolator/breaker; leave DC switching to the installer unless the manual step says to switch DC off immediately (Error 202).
What the engineer will check
- Read BMS logs.
- Check cell voltages/temperatures.
- Update BMS firmware if the manual says so.
- Arrange RMA via installer.
Who to ask for: Battery installer.
Certification: Electrician competent in electrical energy storage (BS 7671 Chapter 57; IET Code of Practice for Electrical Energy Storage Systems), ideally the MCS battery installer (MIS 3012); brand-approved installer to keep warranty.
What you might notice
Sources
- Growatt SPH 3000-6000TL BL-UP User Manual EN 202512 ↗ · EN 202512 · page PDF p.63 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026