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Fronius Modbus register maps

Updated 16 October 2026

2 Fronius models, 314 registers in all, each re-typed from Fronius’s own free documentation and checked against it.

• Solar inverter

  Fronius Primo GEN24 / Symo GEN24 (Plus) SunSpec int+SF

  Fronius Primo/Symo GEN24 (Plus) rest-of-world variants with a battery configured, SunSpec Model Type int+SF; without a battery the MPPT model has 2 inputs and model 124 is absent.

  162 registers · 24 writable · TCP/RTU
  Also known as: Primo GEN24 Plus, Symo GEN24 Plus, Primo GEN24, Symo GEN24, Symo GEN24 10.0 Plus, Primo GEN24 6.0 Plus
• Solar inverter

  Fronius Symo / Primo / Galvo / Symo Hybrid via Datamanager (SunSpec int+SF)

  Fronius inverters read through a Fronius Datamanager (1.0/2.0 card or Hybridmanager) with SunSpec Model Type set to int+SF; model 124 present on Symo Hybrid.

  152 registers · 31 writable · TCP/RTU
  Also known as: Fronius Symo, Fronius Primo, Fronius Galvo, Fronius Symo Hybrid, Fronius IG Plus, Datamanager 2.0

Fronius: default communication settings

Factory defaults as the manufacturer documents them. Change one setting at a time on site and write down what you changed. Word order applies to 32-bit values; the addressing column says how the manufacturer prints register numbers (every map on this site also gives the 0-based wire address).