AC voltage too low

What does 103 mean?

The AC grid voltage at the inverter's connection point has fallen below the permitted limits for the Fronius Primo GEN24 208-240 inverter. This can cause the inverter to disconnect from the grid, preventing proper power feed-in.

• The grid voltage is too low.
• Impedance in the AC connection cable is too high (cable too long, cross-section too small).
• The grid impedance is too high (local grid problem).

Click steps to track your progress.

1. 1

   Measure the AC grid voltage at the inverter's connection point with a multimeter and confirm it falls within the Fronius Primo GEN24 208-240 inverter's specified operating range.

2. 2

   Examine the AC connection cable for appropriate length and cross-section; optimize if necessary to reduce impedance.

3. 3

   Confirm all AC connections are tight and correctly terminated to minimize voltage drop.

4. 4

   Contact the grid operator to investigate and resolve issues related to low grid voltage or high grid impedance in the local grid.

5. 5

   Check the grid connection point for other large loads that might be causing voltage sags.