SPH 3000–6000TL BL-UP / SPH 4000–10000TL3 BH-UP hybrid (Error 2xx–6xx codes)
Growatt Error 506 error code
The inverter detects an open battery circuit (lithium battery). Warning 506 is a different code — battery temperature out of range.
Likely causes
- Battery breaker or DC isolator open
- Battery fuse blown
- Battery cable disconnected or terminal loose
- BMS contactor open because the battery is off or in protection
Checks to run, in order
- 1Check the battery breaker and DC isolator are closed
- 2Check the battery fuse
- 3Check cable continuity and terminal torque at both ends
- 4Check the battery BMS status and whether its contactor is closed
Fixes
- Close the breaker/isolator and replace a blown fuse
- Reconnect and torque the battery cables
- Start the battery and clear any BMS protection, then restart the inverter
When to escalate
If the battery circuit is closed and healthy and Error 506 persists, ask Growatt support to check the battery input detection circuit.
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 Error 506 mean?
The inverter detects an open battery circuit (lithium battery). Warning 506 is a different code — battery temperature out of range.
How do I fix Growatt Error 506?
Close the breaker/isolator and replace a blown fuse Reconnect and torque the battery cables Start the battery and clear any BMS protection, then restart the inverter
When should I escalate Growatt Error 506?
If the battery circuit is closed and healthy and Error 506 persists, ask Growatt support to check the battery input detection circuit.
Can I reset Growatt Error 506 myself?
Only after isolating the AC and DC sides and running the checks above. If Growatt Error 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 Error 506?
Growatt Error 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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