Learn about Fronius Error Code 307, its causes, and how to resolve low DC start voltage issues.
Error Code 307 indicates a low DC start voltage issue in the inverter. This can prevent the inverter from operating correctly.
Check the DC input voltage from the solar panels and ensure it meets the inverter's requirements. Inspect connections for any damage or corrosion.
The Fronius inverter triggers Error 307 when it detects that the DC voltage from the solar array falls below its operational threshold. This can occur due to several electrical factors, including insufficient voltage reaching the inverter due to issues in the array or wiring. The inverter employs Ground Fault Detection and RISO measurements to monitor the integrity of the system, ensuring safe operation. If the voltage dips too low, the inverter enters a protective state to avoid damage, thus generating the fault code.
Upon encountering the Fronius Error 307, the inverter may indicate a fault through specific LED patterns, often flashing a red light or displaying a warning on the monitoring app. Users may notice a significant drop in energy production, with the inverter ceasing to operate effectively due to low DC voltage conditions.
Always consult a licensed electrician or certified solar installer when performing maintenance or troubleshooting on solar systems to ensure safety and compliance with local codes.