SMA Sunny Island 6.0H-13

Battery inverter

Sunny Island 6.0H-13 is a battery inverter rather than a PV string inverter. Its local interface exposes battery and operating measurements through the SMA register profile. In a cluster, the master and system topology determine which values are available; a single inverter power reading must not be labelled as an entire multicluster total.

SMA Sunny Island 6.0H-13 battery inverter
  • Modbus TCP

Battery inverter

Compatibility

Documented local Modbus TCP interface

The manufacturer documents the read interface. Edge requires an explicitly configured client and verified point definitions; this guide is not a ready-made device template.

Exact model SI6.0H-13 from firmware 3.30.12.R, as covered by SI-Modbus-BA-en-12. The -12 generation, 4.4M and 8.0H are distinct models. Monitoring only; grid management, battery limits and remote power commands are outside this guide.

Connect it with

For an already commissioned Sunny Island system

  • Modbus
  • Edge
  • Platforms
Battery inverter
Interface
Gateway
Edge
Output
Sunny Island 6.0H-13Sunny Island master
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeModbus client + register map
Customer platformMQTT · API · files
Modbus TCP
Protected Ethernet
Runs locally
Optional onward data
Activate the local TCP server through the authorised inverter interface. Record the configured port and SMA unit ID; the general SMA profile defaults are TCP 502 and unit ID 3. Use the Sunny Island map, not SunSpec discovery. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
SI6.0H-13Sunny Island 6.0H, generation -13; device code 9475Minimum covered firmware is 3.30.12.R. Confirm the nameplate and code before adding points.
SI6.0H-12Earlier generation; device code 9333A similar power rating does not establish the same firmware scope.
Single-cluster and multicluster systemsMaster/slave and aggregate measurement paths differSMA recommends Data Manager M for reading aggregate multicluster power, energy and state of charge.

Specifications

Exact scope
SI6.0H-13; firmware 3.30.12.R or later covered by the cited manual1
Protocol
SMA Modbus profile only; not SunSpec1
Default endpoint
TCP port 502, SMA unit ID 3; confirm the configured values2
Read functions
FC03/FC04 according to SMA protocol; whole multi-register values2
Address convention
SMA table addresses are PDU addresses; do not strip a 4xxxx prefix or subtract one2
Installation envelope
IP54 and -25 to +60 °C are documented, with mounting, cooling and derating requirements in the operating manual.3

Interface

Documented measurements and integration boundaries for Sunny Island 6.0H-13.

  • Device type at SMA address 30053, U32 TAGLIST; 9475 identifies SI6.0H-13.
  • Battery state of charge at 30845, U32 FIX0, in percent.
  • Battery current at 30843, signed 32-bit FIX3; divide the raw integer by 1,000.
  • Battery voltage at 30851, U32 FIX2; divide by 100 for volts.
  • Inverter power at 30775, signed 32-bit FIX0 in watts, with operating state at 30201.
  • Generator status is an enumerated state, not a measurement of generated energy.

Assessment

SI6.0H-13 local reads, manual revision 12 and its stated firmware scope.

InteroperabilityWell supported
Public model-specific identity and measurement addresses complement the general SMA protocol. The interface is SMA-specific, not SunSpec.12
AccuracySupported with conditions
Battery scales, types and operating states are documented. Cluster totals require the appropriate master or aggregation path.1
SecuritySupported with conditions
SMA requires segmentation and warns against port forwarding. Ordinary Modbus reads do not gain encryption or authentication from the web login.1
ReliabilitySupported with conditions
Operating-state and unavailable-value definitions support explicit fault and stale-data handling; the host must preserve those states.12
RuggednessSupported with conditions
IP54 and -25 to +60 °C are documented, with mounting, cooling and derating requirements in the operating manual.3
ScalabilitySupported with conditions
The manual distinguishes single and multicluster reading and recommends a Data Manager for aggregates. Per-inverter power must not be summed indiscriminately.1
LifecycleSupported with conditions
The manual identifies model generations and minimum firmware, providing a reproducible basis for revalidation after updates.1

Setup

Identify SI6.0H-13 before reading battery current

Manufacturer table values and synthetic decoder fixtures. These bytes were not captured from an operating inverter.

Function
FC03 Read Holding Registers
Identity address and length
30053 decimal = 0x7565; two registers; U32 TAGLIST
Request PDU
03 75 65 00 02
Expected model data
00 00 25 03 = 9475, the SI6.0H-13 device code
Current point
30843 decimal = 0x787B; two registers, S32 FIX3
Synthetic current data
FF FF CF 2C = -12500; divide by 1000 = -12.5 A
Unavailable values
S32 0x80000000 and U32 0xFFFFFFFF must remain unavailable

Acceptance: Accept the model only when its code and nameplate agree. The negative current fixture checks signed decoding; establish the installed system’s charge/discharge sign against its own interface before labelling direction.

  1. Confirm model, firmware and topology

    Record SI6.0H-13, its firmware and the cluster master. The manual covers this model from 3.30.12.R. For a multicluster installation, identify whether the required measurement is per-inverter or a Data Manager aggregate.

  2. Enable and restrict local reads

    In External communication, enable the Modbus TCP server using an authorised account. Record the IP address, TCP port and unit ID. Restrict access to the monitoring host; enabling Modbus exposes a writable interface as well as reads.

  3. Read the model identifier first

    Read two holding registers at PDU address 30053. The U32 device type must be 9475 and agree with the nameplate. Stop on a different code instead of applying a nearby Sunny Island model map.

  4. Add battery quantities with their declared scales

    Read complete two-register values for SOC, current and voltage. FIX3 current is a signed integer divided by 1,000; FIX2 voltage is unsigned divided by 100. Reject type-specific unavailable values before scaling.

  5. Compare the same measurement boundary

    Compare the local battery display and inverter power at the same time. Verify sign under a known charge or discharge condition. Retain operating state, stale timestamps and communication errors; do not turn missing readings into zero. Repeat these checks after firmware changes.

Sources

  1. Sunny Island Modbus user manual, revision 12 (opens in a new tab) (PDF) SMA
  2. SMA Modbus technical information, revision 10 (opens in a new tab) (PDF) SMA
  3. Sunny Island -13 operating manual, revision 19 (opens in a new tab) (PDF) SMA

Further reading

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