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Jessica SmithSep 9, 2025
What does Vac-Bfr or Vac-Srr mean on SMA 5000TL?
- CchallSep 9, 2025
If your SMA Inverter shows 'Vac-Bfr' or 'Vac-Srr', the grid voltage is outside the permissible range. Check the grid current and connection at the inverter. If the voltage is outside the acceptable range due to local grid conditions, contact the utility operator to adjust the voltage or request changes to the monitored operational limits (Vac-Min and Vac-Max). If the grid frequency is within the tolerable range, yet the errors persist, contact the SMA Serviceline.












