DC voltage too low (PV2)
Fronius · Primo GEN24
What does 510 mean?
The Fronius Primo GEN24 208-240 inverter has detected that the DC voltage from the PV2 string is too low for operation. This indicates insufficient voltage for power conversion, often caused by low sunlight or problems within the PV array.
Common Causes
- DC voltage too low (PV2).
- Insufficient irradiation.
- Too few modules in series.
- Faulty PV modules.
- Dirty PV modules.
- Partial shading of the PV array.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Confirm adequate solar irradiation on the PV2 string, ensuring it's not operating in low light conditions or during nighttime.
- 2
Measure the open-circuit voltage (Voc) of the PV2 string at the Fronius Primo GEN24 208-240 inverter's input terminals and compare it to the inverter's minimum operating voltage specification.
- 3
Verify the number of PV modules in series for PV2; ensure it meets the minimum string voltage requirement for the Fronius Primo GEN24 208-240 inverter.
- 4
Inspect PV2 modules for accumulation of dirt, dust, snow, or any partial shading that could drastically lower the voltage output.
- 5
Check all electrical connections within the PV2 string for looseness or damage, including bypass diodes in modules.