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Solar & battery inverters Modbus register maps

Updated 28 October 2026

6 solar & battery inverters register maps from 5 manufacturers: Fronius, SMA, Schneider Electric, SolarEdge, Victron Energy.

• 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
• Solar inverter

  Schneider Electric Conext CL three-phase PV inverter 18/20/25 kVA

  Conext CL (IEC, PVSCL20E/25E) and Conext CL-NA (PVSCL18NA/25NA) three-phase string inverters, map revision 1.5.

  51 registers · 6 writable · RTU/TCP
  Also known as: Conext CL-NA, Conext CL-E, PVSCL18NA, PVSCL20E, PVSCL25E, PVSCL25NA
• Battery inverter

  SMA Sunny Tripower Storage X / Sunny Island X (SMA Modbus, ennexOS)

  Sunny Tripower Storage X 30/50 (incl. US variants) and Sunny Island X 30/50 (incl. US variants), queried through the System Manager over Modbus TCP.

  30 registers · 21 writable · TCP
  Also known as: STPS30-20, STPS50-20, STPS27-US-20, STPS60-US-20, SI30-20, SI50-20, SI27-US208-20, SI40-US480-20, SI60-US480-20, Sunny Tripower Storage X 50, Sunny Island X 50
• Solar inverter

  SolarEdge SolarEdge inverters (SunSpec logging)

  SolarEdge single-, split- and three-phase inverters with SunSpec enabled (SolarEdge Go/SetApp units, or LCD units on firmware 3.xxxx+); meter 1 at the non-Synergy default base.

  77 registers · 0 writable · RTU/TCP
  Also known as: SE5000, Synergy, SolarEdge SunSpec
• Battery inverter (GX gateway for inverter/chargers, batteries and solar chargers)

  Victron Energy GX device Modbus-TCP (Cerbo GX, Venus GX, Color Control GX)

  Victron GX devices running Venus OS with the Modbus-TCP service enabled; register list version 3.81 (document Rev 54). Core system, VE.Bus inverter/charger, battery, solar charger and ESS registers only.

  128 registers · 21 writable · TCP
  Also known as: Cerbo GX, Cerbo-S GX, Venus GX, Color Control GX, CCGX, Ekrano GX, Octo GX, MultiPlus-II GX, EasySolar-II GX, Venus OS, dbus-modbustcp

Solar & battery inverters: 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).