Energy Gateway SMA HM-20 Ethernet / SMA Energy Meter interface / SEMP / EEBUS / Sunny Portal

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

Jun 28, 2026

Source checked

Jun 28, 2026

Official references

Verified 2026-06-28 CST against SMA official Sunny Home Manager 2.0 product page, HM-20 datasheet, HM-20 operating manual, and official SMA product image. Gateway/data-logger only: Ethernet energy-management gateway with integrated grid-connection measurement, Sunny Portal / SMA Energy App workflows, SMA Energy Meter interface, SEMP, EEBUS, up to 24 measurable devices / 12 controllable devices, dynamic active-power / zero-export management, DIN-rail switchboard installation, and import/export energy-flow visibility. No energy-meter-only accuracyClass, currentSensorSetup, or maxCurrentAmps fields were written.

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 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 official HM-20 datasheet supports up to 24 measurable devices and up to 12 measurable-and-controllable devices. It also lists SMA Energy Meter interface, SEMP and EEBUS support, which makes the device important for homes that want coordinated self-consumption rather than only meter readings.

Installation And Connectivity

Sunny Home Manager 2.0 is designed for DIN-rail / top-hat-rail installation in the switch or meter cabinet. The official datasheet lists Ethernet as the communication interface, while Sunny Portal powered by ennexOS and SMA Energy App provide the normal setup, visualization and energy-management workflows.

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 style controls and smart-load scheduling. Do not compare it like a direct CT clamp monitor or revenue-grade utility meter.

Practical Limits

SMA's official sources support measurement accuracy of 1 percent or better and direct measurement up to 63 A per phase, with external current-transformer support above 63 A. Those facts are preserved in the source notes, but this record intentionally does not fill energy-meter-only fields such as accuracyClass, currentSensorSetup or maxCurrentAmps because the page is maintained as a gateway/data-logger record.

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, and SMA Speedwire/Ethernet ecosystem communication.
Connected devices: 24
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, dynamic-tariff features, installer/dealer routes, and compatible-device support vary by market.