SPH 3000–6000TL BL-UP / SPH 4000–10000TL3 BH-UP hybrid (Error 2xx–6xx codes)
Growatt Warning 506 error code
Battery temperature is outside the range allowed for charge or discharge.
Likely causes
- Ambient temperature above or below the battery's operating range
- Battery in direct sun or in an unventilated room
- Blocked ventilation around the battery
- Battery temperature sensor fault
Checks to run, in order
- 1Check the ambient temperature at the battery
- 2Check the battery is not in direct sun or an enclosed hot space
- 3Check ventilation and clearance around the battery
- 4Compare the battery's reported temperature with a contact thermometer
Fixes
- Shade, ventilate or relocate the battery to bring it into range
- Stop charging/discharging until the temperature recovers
- Restart and confirm the warning clears
When to escalate
If the battery temperature is within the specified range and Warning 506 persists, involve the battery manufacturer for a sensor check.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does Growatt Warning 506 mean?
Battery temperature is outside the range allowed for charge or discharge.
How do I fix Growatt Warning 506?
Shade, ventilate or relocate the battery to bring it into range Stop charging/discharging until the temperature recovers Restart and confirm the warning clears
When should I escalate Growatt Warning 506?
If the battery temperature is within the specified range and Warning 506 persists, involve the battery manufacturer for a sensor check.
Can I reset Growatt Warning 506 myself?
Only after isolating the AC and DC sides and running the checks above. If Growatt Warning 506 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Growatt Warning 506?
Growatt Warning 506 is documented for SPH 3000–6000TL BL-UP / SPH 4000–10000TL3 BH-UP hybrid (Error 2xx–6xx codes). Confirm the code on your own unit's display or manual before ordering parts.
More Growatt error codes
- Growatt 01Fan is locked (displayed as F01 on the SPF ES Lite).
- Growatt 02Internal component temperature is over 100 °C (F02 on the ES Lite).
- Growatt 03Battery is over-charged / battery voltage is too high (F03 on the ES Lite).
- Growatt 04Battery voltage low.
- Growatt 05Output is short-circuited (F05 on the ES Lite).
- Growatt 06Output voltage is too high. The manual groups 06/58 as 'output abnormal' — inverter voltage above 150 Vac or below 40 Vac.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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