--- title: "Alfen Modbus" description: "Alfen Modbus is a Marketplace integration for Home Assistant. It has 191 installs sharing analytics, works locally and was last updated October 22, 2026." canonical: "https://vulpo.app/integrations/marketplace/thastealth-alfen-modbus" url: "https://vulpo.app/integrations/marketplace/thastealth-alfen-modbus.md" last-updated: "2026-10-22" version: "1.4" --- # Alfen Modbus > Alfen Modbus is a Marketplace integration for Home Assistant. It has 191 installs sharing analytics, works locally and was last updated October 22, 2026. Alfen Modbus connects Alfen Eve NG9xx and AHP series EV chargers to Home Assistant over local Modbus TCP. It adds sensors for voltage, current, power and energy on all phases, plus car status, charging state and per-session energy and duration. Controls include a maximum current limit, a charger enabled switch and a selector for usable phases, which suit dynamic load balancing. A separate measurement interval can be set to 2-5 seconds for load balancing, while energy totals use the regular scan interval. Dual socket chargers and Smart Charging Network registers can be enabled as options. Entity names follow the Home Assistant language in eight languages, and a repair notice flags a known charger firmware power budget reset bug. The charger needs Modbus TCP and an Active Load Balancing license, and setup is done in the UI. Automatic summary of the README and code of ThaStealth/alfen\_modbus. Something wrong, or are you the maintainer and want your own text here? [Get in touch](https://vulpo.app/contact) [Open in My Home Assistant](https://my.home-assistant.io/redirect/hacs_repository/?owner=ThaStealth&repository=alfen_modbus&category=integration) On Home Assistant 2026.11 or newer? [Open it in the Marketplace](https://my.home-assistant.io/redirect/marketplace_repository/?owner=ThaStealth&repository=alfen_modbus&category=integration) ## Supports - **Works locally**: Talks to your devices on your own network. No vendor cloud in between. - **From the Marketplace**: Installed through the Marketplace, formerly HACS. - **Actively maintained**: Its author released or pushed a change in the last six months. ## Setting it up Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services. ### Alfen Modbus Connection - **Host**: The IP address or hostname of your Alfen device - **Name**: Prefix for sensor names - **Port**: TCP port (default: 502) - **Modbus Address**: Modbus slave address (default: 200) - **Read SCN**: Enable Smart Charging Network registers - **Read Socket 2**: Enable socket 2 for dual socket units - **Scan Interval**: Polling interval in seconds for energy totals and station data - **Measurement Interval**: Polling interval in seconds for power, current, voltage and charger state. Use 2-5 s for load balancing; defaults to the scan interval ### After setup - **Host**: The IP address or hostname of your Alfen device - **Port**: TCP port (default: 502) - **Read SCN**: Enable Smart Charging Network registers - **Read Socket 2**: Enable socket 2 for dual socket units - **Scan Interval**: Polling interval in seconds for energy totals and station data - **Measurement Interval**: Polling interval in seconds for power, current, voltage and charger state. Use 2-5 s for load balancing; defaults to the scan interval Texts from the code of [ThaStealth/alfen\_modbus](https://github.com/ThaStealth/alfen_modbus). ## Entities - **Binary sensors**: Back office, Connection state, Charging state, SCN max current enabled, Charger enabled - **Numbers**: Max current limit, SCN max current L1, SCN max current L2, SCN max current L3 - **Selects**: Usable phases - **Sensors**: Name, Manufacturer, Modbus table version, Firmware version, Platform type, Serial, Current time, Last boot, Actual max current, Board temperature, Backoffice connected, Number of sockets, and 71 more - **Switches**: Charger enabled ## Troubleshooting - **Diagnostics**: Downloads a diagnostics file to attach to a bug report. - **Repair notices**: Notices it can show in Settings, Repairs: Charger firmware has a known power budget reset bug ## From the README > Home Assistant integration for Alfen Eve NG9xx and AHP series EV chargers via Modbus TCP. > > - 🔌 Real-time monitoring - Voltage, current, power, energy for all phases > - 🚗 Car status detection - Connected, charging, disconnected states > - ⚡ Load balancing control - Set maximum charging current dynamically > - 🛡️ Max current protection - Prevents setting current above station limit > - 📊 Session tracking - Energy consumed and duration per charging session > - 🔄 Auto-renew max current - Prevents timeout to safe current mode > - 🏢 Multi-socket support - Works with dual socket chargers > - 🌐 SCN support - Smart Charging Network: per-phase consumption, actual/max/safe current and enable state, with a control to set the max current per phase > - 🗣️ Localized UI - Entity names and states are translated into English, Dutch, German, French, Finnish, Norwegian, Swedish and Danish, following your Home Assistant language setting > - 🩺 Diagnostics - Download a redacted diagnostics report from Settings → Devices & Services for bug reports > - 🚑 Repair notifications - Flags known issues (e.g. outdated NG9xx firmware) directly in Settings → Repairs From the README of [ThaStealth/alfen\_modbus](https://github.com/ThaStealth/alfen_modbus#readme), [Apache License 2.0](https://spdx.org/licenses/Apache-2.0.html). Shortened. ## At a glance - Kind: Marketplace integration - Category: [Energy](https://vulpo.app/integrations/category/energy.md), EV charging - Number: 191 installs sharing analytics; 24 GitHub stars - Connection: Works locally - Upkeep: Updated in the last 6 months - Needs: Needs the Marketplace (HACS on 2026.10 and older) - Latest version: 0.3.0, last updated October 22, 2026 - Domain: `alfen_modbus` - Source: - Issues: In Vulpo: Quick Toggle card, Select card, Chart card, Apple Watch, Control Center Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation. [About these numbers](https://vulpo.app/integrations/about) Last updated 2026-10-22. 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