EL
ErrorLib
Brands
||
  1. Home
  2. Fronius
  3. Solar Energy
  4. 306
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

306

Not enough PV power or no battery power requested

Fronius · Solar Energy

What does 306 mean?

There is insufficient PV power available for feeding energy into the grid, and simultaneously, no power has been requested from the battery. This results in a short-term interruption while the inverter repeats its start-up routine. This is often displayed routinely early morning or evening due to low insolation and may not indicate a fault.

Common Causes

  • Insufficient solar insolation (e.g., early morning, evening, cloudy weather)
  • No power request from the energy management system

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Observe the solar insolation levels and wait for sufficient sunlight

  2. 2

    Verify if any energy management commands are pending or active

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1Hardware fault102AC voltage too high103AC voltage too low
Source: Fronius Solar Energy
Open Manual (Page 124)Search more codes in this manual