Configure the Fronius inverter IP address or hostname.

Call this once to tell the MCP server where your inverter lives. The value is saved to ~/.fronius-mcp.json and persists across restarts.

Also returns instructions for finding the inverter IP and enabling the Solar API — useful for first-time setup.

Args: host: IP address or hostname of the inverter (e.g. '192.168.178.35'). Scheme and port are stripped automatically.

Returns a confirmation message plus setup instructions, or a connectivity warning if the inverter cannot be reached.

Real-time power flow data from the Fronius Symo GEN24 inverter.

Returns PV generation (pv_w), grid exchange (grid_w, positive = import, negative = export), house load (load_w), battery power (battery_w, positive = charging, negative = discharging), autonomy and self-consumption percentages, daily/yearly/total energy yields, operating mode, and battery standby state.

Real-time data from the Fronius Smart Meter at the grid feed-in point.

Returns total grid power (power_w), per-phase real power (power_l1/l2/l3_w), total energy consumed from grid (energy_consumed_wh), total energy fed into grid (energy_fed_wh), per-phase voltage and current (voltage/current_l1/l2/l3), and grid frequency (frequency_hz). Positive power = importing from grid, negative = exporting to grid.

Real-time data from the BYD Battery-Box Premium HV.

Returns state of charge (soc_pct), DC voltage and current, cell temperature (temp_c), usable and design capacity in Wh, cell status, enabled flag, and manufacturer/model info.

Lists all devices currently connected to the Fronius inverter system.

Returns a dict with device classes (inverter, meter, storage, ohmpilot, etc.) as keys. Each entry is a list of connected devices with their bus index and serial number. Empty list means the device class is supported but nothing is connected. Useful for verifying system topology or diagnosing missing devices.