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Backup power overload

Backup power overload — Backup power mode stopped due to excessive load

Fronius · Primo GEN24 Inverters

What does Backup power overload mean?

The inverter has stopped operating in backup power mode because the connected electrical loads have exceeded its maximum power capacity. This 'Backup power overload' status code is displayed on the inverter's LED status indicator.

Common Causes

  • Too many electrical appliances connected to the PV Point circuit in backup power mode.
  • High start-up currents from certain appliances (e.g., Refrigerators, freezers) exceeding the inverter's temporary overload capacity.
  • The total power consumption exceeding the inverter's maximum continuous output of 1560W in backup power mode.
  • Sustained load exceeding the inverter's temporary overload capacity (35% for 5 seconds).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reduce the number of electrical appliances connected to the backup power circuit by unplugging non-essential devices.

  2. 2

    Switch off non-essential loads when the system is operating in backup power mode to stay within the power limits.

  3. 3

    Be aware of appliances with high start-up currents; avoid starting multiple such devices simultaneously in backup mode.

  4. 4

    Check the total continuous power consumption of all connected devices and ensure it remains below the specified maximum output for backup power mode (e.g., 1560W).

  5. 5

    Refer to the inverter's technical data for specific maximum power limits and overload capacities in backup power mode.

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Verified technical data. Last updated: April 2026

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Source: Fronius Primo GEN24 Inverters
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