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PowerBalancer

PowerBalancer — Unbalanced load condition in a three-phase system

SMA · Sunny Boy Inverters

What does PowerBalancer mean?

This message indicates that the Sunny Boy inverter, part of a three-phase system with other inverters and an SMA Power Balancer, is experiencing an unbalanced load condition. This usually happens when the 'PhaseGuard' or 'FaultGuard' operating parameter is active to prevent grid imbalances.

Common Causes

  • Operating parameter 'PowerBalancer' set to 'PhaseGuard' or 'FaultGuard'.
  • Unbalanced load condition in a multi-inverter system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to section 6.2 'Status Messages' (page 25) under 'Balanced' for detailed descriptions of these operating modes.

  2. 2

    Your installer can adjust PowerBalancer parameters if necessary, based on system requirements.

  3. 3

    Monitor the system's performance and other inverters in the three-phase setup for any related issues.

Browse all codes in this manual (70)
Verified technical data. Last updated: April 2026

Related Faults

!PV-Overvoltage!!PV-Overvoltage! !DISCONNECT DC! — Overvoltage at DC input10251Event 10251 — Communication status to network switch or DHCP server changed10252Event 10252 — Communication disrupted
Source: SMA Sunny Boy Inverters
Open Manual (Page 31)Search more codes in this manual