Alpha ESS MCP Server

A Model Context Protocol (MCP) server that provides access to Alpha ESS solar inverter and battery system data through the official Alpha ESS Open API.

Installation

uv sync

Related MCP server: Fronius MCP Server

Configuration

Create a .env file in the project root:

ALPHA_ESS_APP_ID=your_app_id_here
ALPHA_ESS_APP_SECRET=your_app_secret_here

To get your Alpha ESS API credentials:

1. Visit https://open.alphaess.com/

2. Create a developer account

3. Add your inverter system using the Serial Number (SN) and CheckCode

4. Obtain your AppID and AppSecret

Usage with Claude Desktop

Add to your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "alpha-ess": {
      "command": "uv",
      "args": [
        "run",
        "python",
        "/path/to/alpha-ess-mcp-server/main.py"
      ],
      "env": {
        "ALPHA_ESS_APP_ID": "your_app_id_here",
        "ALPHA_ESS_APP_SECRET": "your_app_secret_here"
      }
    }
  }
}

Available Tools

Authentication & System Management

• authenticate_alphaess() - Validate API credentials

• get_ess_list() - List all registered Alpha ESS systems

Data Retrieval

• get_alpha_ess_data() - Get comprehensive energy statistics for all systems

• get_last_power_data(serial?) - Get real-time power data snapshot

• get_one_day_power_data(query_date, serial?) - Get detailed power data for a specific date

• get_one_date_energy_data(query_date, serial?) - Get energy summary for a specific date

Battery Configuration

• get_charge_config(serial?) - Get current battery charging configuration

• get_discharge_config(serial?) - Get current battery discharge configuration

• set_battery_charge(enabled, dp1_start, dp1_end, dp2_start, dp2_end, charge_cutoff_soc, serial?) - Configure battery charging schedule

• set_battery_discharge(enabled, dp1_start, dp1_end, dp2_start, dp2_end, discharge_cutoff_soc, serial?) - Configure battery discharge schedule

Parameters

• serial (optional) - System serial number. If not provided, automatically selects the first system if only one exists

• query_date - Date in YYYY-MM-DD format

• enabled - Boolean to enable/disable the configuration

• dp1_start/dp1_end, dp2_start/dp2_end - Time periods in HH:MM format (minutes must be :00, :15, :30, :45)

• charge_cutoff_soc/discharge_cutoff_soc - SOC percentage (0-100)

Testing

uv run python test_methods.py

License

MIT License

References

• Alpha ESS Open API Documentation

• alphaess-openAPI Library

• Model Context Protocol