marstek

This project emulates Smart Meter devices for Marstek storages such as the B2500, Marstek Jupiter and Marstek Venus energy storage system while allowing integration with almost any smart meters.

A universal electric meter data converter (emulator)

Home Assistant integration for Marstek energy storage systems using local API

Control your Home Batteries via Home Assistant using the RS485 modbus or ethernet port (e.g. Marstek Venus) -- Thuisbatterij aansturen via Home Assistant

Custom integration to monitor and control Marstek Venus and Zendure batteries in Home Assistant.

Custom integration to monitor and control Marstek Venus E v2, Venus E v3, Venus A, and Venus D systems in Home Assistant.

Bridge MQTT messages between Marstek storage systems (Saturn/B2500, Venus, Jupiter) and local home automation, enabling simultaneous use of the official mobile app and local automation control.

Tasmota Images with SML, Script and Google Chart Support for Energy/Grid meter

Tasmota Script with SML and Google Charts for Energy/Grid meter

Home Assistant custom component to integrate with Marstek devices using the local API.

Custom Integration to get the Marstek CT Smart Meter into Home Assistant

ESPHome config for Marstek Venus Battery with LilyGO T-CAN485

Web-based replacement for the Marstek App allowing cloud-free use of Venus storages

Custom Lovelace card for Home Assistant to visualize Marstek B2500d (and other solar storage systems).

Firmware archive for Marstek Venus E, Venus D, Venus A, Saturn/B2500 & CT002 — original OTA firmware downloads with release notes (EN/DE), SHA-256 checksums and changelogs

Home Assistant custom integration for Marstek Venus battery storage over local Modbus TCP — Venus A, D, E v1/v2 and E v3. Sensors, controls, schedules and a full register map. No cloud. HACS compatible.

Run a Marstek Venus battery without the cloud. Self-hosted container that answers the telemetry upload locally — stopping the firmware's 30-minute network resets that break Modbus TCP and Home Assistant.

🔋 Home Assistant integration for local control of Marstek battery energy storage systems

Marstek Venus (E / E 3.0) Batteriesteuerung fuer Home Assistant: Nulleinspeisung ueber WLAN (Open API) oder Modbus, Dashboard, Ein-Befehl-Installer. Zero-export control for Marstek Venus batteries in Home Assistant.

Static reverse-engineering of Marstek Venus D/E firmware (Control/EMS, Micro-Inverter/VNS, BMS) with Ghidra — complete Modbus TCP & RS485 register map, protocol notes and Python scan tools