Energy Gateway SMA HM-20 Ethernet / Speedwire / SMA Energy Meter interface / SEMP / EEBUS / Modbus TCP / Sunny Portal powered by ennexOS

SMA Sunny Home Manager 2.0

A DIN-rail SMA energy-management gateway for coordinating solar self-consumption, batteries, EV charging and flexible household loads through Sunny Portal and compatible local interfaces.

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Source Checked

Checked for product fit and source-backed specs

Editorial policy

Last reviewed

Sep 20, 2026

Source checked

Sep 20, 2026

Official references

Verified 2026-09-20 UTC from SMA's current Sunny Home Manager 2.0 product page, release notes, HM-20 ennexOS operating manual Rev 1.4, and Smart Home compatibility list Rev 1.8. Gateway/data-logger scope: Ethernet energy manager with integrated grid-point measurement, Sunny Portal powered by ennexOS / SMA Energy App workflows, SMA Energy Meter interface, SEMP, EEBUS, Speedwire and local Modbus TCP grid-control input. The ennexOS manual supports 26 monitored devices, 12 actively controlled, with limits including 1 battery/hybrid inverter, 3 SMA EV chargers and 5 SMA Energy Meters. Firmware 2.18.14.R adds current 2026 EEBUS/grid-control and supported-device updates. No energy-meter-only accuracy, CT or current fields apply.

What matters for buyers

Installation fit, electrical context, and whether the device suits the home it is being considered for.
Monitoring quality, local-versus-cloud data access, and platform compatibility.
Unknown specs stay blank rather than being guessed.

Editorial stance

Manufacturer documents can support source checks, but recommendations stay based on homeowner fit and practical trade-offs.

Device Overview

SMA Sunny Home Manager 2.0 is a residential energy-management gateway for SMA solar homes. It sits in the switch or meter cabinet, measures energy flow at the grid-connection point, and coordinates compatible inverters, storage, EV charging and flexible loads through SMA's Sunny Portal powered by ennexOS and SMA Energy App ecosystem.

This page treats it as an energy gateway / data logger, not as a standalone energy-meter page. Its value is the control and coordination layer: it helps decide when to run loads, charge batteries, charge an EV, or limit export based on PV production, forecasts, tariffs and system settings.

Core Gateway Fields

The current HM-20 ennexOS operating manual supports up to 26 monitored and visualized devices, of which up to 12 can be actively controlled. It also documents limits including one SMA battery or hybrid inverter, three SMA EV chargers and five SMA Energy Meters. SMA Energy Meter interface, SEMP, EEBUS, Speedwire/Ethernet and a local Modbus TCP grid-control interface make the device useful for coordinated self-consumption rather than meter readings alone.

Installation And Connectivity

Sunny Home Manager 2.0 is designed for DIN-rail / top-hat-rail installation in the switch or meter cabinet. Ethernet connects it to the local network and compatible devices. Sunny Portal powered by ennexOS and SMA Energy App provide the normal setup, configuration, visualization, forecast and tariff workflows; the local Modbus TCP interface is specifically documented for supported grid-control setpoints rather than as a general-purpose open telemetry API.

Compatibility Notes

Use this record for SMA Home Energy Solution comparisons where the buyer is evaluating system-level coordination: PV inverter data, battery charging windows, EV charging behavior, dynamic active-power control, zero-export controls and smart-load scheduling. Compatibility depends on exact device model and firmware, so SMA's current compatibility list should be checked before purchase or system design.

Practical Limits

Dynamic-tariff support is currently documented for Germany, Belgium and the Netherlands, while product availability and compatible-device support vary by country. The device is not a MID billing meter. Although the hardware includes grid-point measurement, this record intentionally leaves energy-meter-only fields such as accuracyClass, currentSensorSetup and maxCurrentAmps unset because it is maintained as a gateway/data-logger page.

Product Images

Gallery, diagrams, and supporting visuals.

SMA Sunny Home Manager 2.0 official product image — Official SMA product image for the Sunny Home Manager 2.0 energy-management gateway.

SMA Sunny Home Manager 2.0 dynamic tariffs visual — Official SMA visual showing Sunny Home Manager 2.0 in dynamic-tariff energy-management context.

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Phase support: Single- or three-phase grid-connection context; 110 / 230 / 400 V, 50 / 60 Hz.
Installation: DIN-rail / top-hat-rail installation in the switch or meter cabinet at the grid-connection point.
Measurement: Gateway/data logger and energy manager with integrated grid-connection measurement for PV self-consumption, import/export visibility and load control.
Connectivity: Ethernet connection to the local router; Sunny Portal and SMA Energy App are used for setup and visualization.
Downstream protocols: SMA Energy Meter interface, SEMP, EEBUS, Speedwire/Ethernet, and local Modbus TCP grid-control interface (default port 502).
Connected devices: 26
Gateway role: Residential solar energy-management gateway and load-control coordinator for SMA Home Energy Solution systems.
Local API: Yes
Cloud dependency: Sunny Portal / SMA Energy App are central for setup, visualization, forecasts and tariff workflows; compatible local devices communicate over Ethernet.
Solar import/export: Yes
Availability: Global SMA product range; country availability and compatible-device support vary. Dynamic-tariff features are currently documented for Germany, Belgium and the Netherlands.