1. Home
2. Modbus register maps
3. SMA

Manufacturer

SMA Modbus register maps

Updated 16 October 2026

1 SMA model, 30 registers in all, each re-typed from SMA’s own free documentation and checked against it.

• 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

SMA: 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).