SMA Sunny Central Storage UP

Compatibility

Direct Edge integration not yet verified

SMA document MODBUS-SCS-NSD-xxx-TI-en-21 covers the UP models from firmware 10.02.xx.R and provides addresses, function codes, units and decoding. It is a best-effort starting map; confirm the installed profile and compare a read with the local display. Edge deployment remains project-specific.

SCS 3450 UP, 3600 UP, 3800 UP and 3950 UP in datasheet SCS-UP-DS-en-23. Confirm exact type designation, firmware, battery, controller and medium-voltage system. No control or protection authority is transferred.

Models

Specifications

The current datasheet covers four European type designations from 3,450 to 3,960 kW nominal output at 25 °C and DC operation up to 1,500 V.²

Model range

SCS 3450 UP, 3600 UP, 3800 UP and 3950 UP²

Nominal output

3,450 to 3,960 kW at 25 °C, depending on exact type²

DC range

Model-dependent lower limit from 880 to 1,003 V; 1,500 V maximum²

Published communications

Ethernet, Modbus Master and Modbus Slave; Modbus TCP to SMA string monitor²

Environment

Electronics IP54; -25 to +60 °C standard, optional to -40 °C; derating applies²

Control scope

Grid-forming, current boost and black-start readiness are optional engineered functions, not monitoring permissions²

Interface

Documented measurements and integration boundaries for Sunny Central Storage UP.

• Unit ID 3, FC04: DC voltage at address 0, total AC active power at 28 and grid frequency at 38. Each uses two registers and signed S32 decoding; divide voltage by 10 and frequency by 100, while power is directly in kW.
• Battery communication, inverter control, plant controller, string monitor, site meter and protection relay remain distinct sources.
• Unit ID 2 contains system data, unit ID 3 the inverter, and unit ID 100 the optional user-defined profile. A battery profile is separate; inverter data is not automatically whole-site or battery-rack telemetry.
• No grid-forming, current boost, black start, reactive-power, protection or battery command is approved by this guide.

Setup

1. Confirm the delivered system

   Record every enclosure, battery rack, PCS, BMS, EMS, meter and controller identity, plus firmware, software, network and contract revisions.

2. Map authority before data

   Document which system owns charge and discharge, protection, fire and life safety, grid control, market dispatch, settlement, warranty and emergency response.

3. Read DC voltage with FC04

   Use the inverter’s configured Modbus endpoint, unit ID 3 and FC04 (Read Input Registers), starting address 0, length 2. These are direct protocol addresses: do not add 30001 or subtract one. Decode the two words as signed S32, high word first, and divide by 10 for volts. For an illustrative response of words 0 and 8500, the result is 850.0 V. Compare it with the inverter’s DC-voltage display.

4. Compare AC power and keep the controller

   Read unit ID 3, FC04, address 28, length 2 for InvMs.TotW: signed S32, scale 1, kW. Compare the value and direction with the inverter display and its AC feeder meter during existing operation. Use a slow monitoring interval; SMA limits instantaneous reads to 10 per second. Leave plant setpoints and the separate battery communication unchanged.

Common questions

Does Modbus Slave prove a direct Edge path?

SMA publishes a concrete inverter server map, so monitoring can start with the FC04 reads in this guide. A project still needs the configured endpoint and profile; an installed Edge path is not established by this document.³

Can Edge use the string-monitor connection?

Not automatically. The datasheet names that route for SMA string-monitor communication; it does not define a general third-party telemetry service.²

Can this guide enable grid-forming or black start?

No. Those optional functions require project engineering, grid approval, protection studies and an authorised plant controller.²