BMS Warning:XXX on a Growatt SPH 3000-6000TL BL-UP: BMS report warning - check the battery's own manual for the XXX code
Short answer
On a Growatt battery, BMS Warning:XXX means: BMS report warning - check the battery's own manual for the XXX code. The battery keeps running with some functions stopped.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: BMS report warning - check the battery's own manual for the XXX code.
Part involved: Battery voltage / state of charge.
Likely causes:
- check the battery's own manual for the XXX code.
Is it safe?
| Does the battery stop? | Partly |
|---|---|
| Severity | Warning |
The battery keeps running with some functions stopped.
Resetting itself: usually - clears once the battery recharges from PV or grid.
Manual reset: sometimes (battery activation/force charge).
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Check the battery is switched on and not paused in the app.
- Check reserve/charge settings in the app; in cold weather charging may pause below 0 C.
- 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
- Measure battery voltage.
- Force-charge / battery activation per manual.
- Check BMS alarms and cell imbalance.
- Check DC breaker and polarity.
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.62-66 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026