MEGA 6/8/10/12 kW single-phase hybrid inverter — inverter fault
Beve 03 error code
Battery voltage is above the inverter's high battery cut-off.
Likely causes
- Charge or float voltage set above the battery manufacturer's limit
- Wrong battery type selected in settings
- External charger or MPPT pushing the bank too high
- Battery voltage sensing error
Checks to run, in order
- 1Measure battery terminal voltage at the moment the alarm appears
- 2Compare it with the battery's published charge voltage
- 3Check Bat Type and the charge voltage settings
- 4For a lithium bank, compare the BMS-reported voltage with the meter reading
Fixes
- Set charge and float voltage to the battery manufacturer's specification
- Correct the battery type setting
- If the measured voltage is normal but the alarm persists, treat it as a sensing fault and return the unit to the repair centre
When to escalate
If measured battery voltage is within spec while code 03 repeats, ask the distributor to check the DC voltage sensing 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 Beve 03 mean?
Battery voltage is above the inverter's high battery cut-off.
How do I fix Beve 03?
Set charge and float voltage to the battery manufacturer's specification Correct the battery type setting If the measured voltage is normal but the alarm persists, treat it as a sensing fault and return the unit to the repair centre
When should I escalate Beve 03?
If measured battery voltage is within spec while code 03 repeats, ask the distributor to check the DC voltage sensing circuit.
Can I reset Beve 03 myself?
Only after isolating the AC and DC sides and running the checks above. If Beve 03 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Beve 03?
Beve 03 is documented for MEGA 6/8/10/12 kW single-phase hybrid inverter — inverter fault. Confirm the code on your own unit's display or manual before ordering parts.
More Beve error codes
- Beve 01Cooling fan is locked and not turning while the inverter is switched on.
- Beve 02Inverter temperature has exceeded its protection point.
- Beve 05Output short circuit detected on the inverter AC output.
- Beve 06Inverter output voltage is above the acceptable window; the manual's troubleshooting table puts this above 260 Vac.
- Beve 07Overload: the inverter has been running above its rating (102% in the manual's note) until the overload time expired.
- Beve 08Internal DC bus voltage is above its limit.
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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