ha-claude/migration_log.md

Migration Log — HA + Domoticz

2026-04-06 — EMHASS Initial Configuration

Discovery completed

• All critical Deye inverter sensors confirmed working via MQTT
• Sign conventions verified:
  • battery_power: positive = discharging, negative = charging
  • total_grid_power: positive = import, negative = export
  • Formula: grid + pv = load + (-battery) ✓

Sensor decisions

Role	Sensor chosen	Notes
PV power	sensor.deye_inverter_mqtt_dc_total_power	DC total (PV1+PV2)
House load	sensor.load_power_no_var_loads	Template sensor, ready for EV subtraction later
Grid power	sensor.deye_inverter_mqtt_total_grid_power	Signed, +import/-export
Battery SOC	sensor.deye_inverter_mqtt_battery_soc	Direct from inverter
Battery power	sensor.deye_inverter_mqtt_battery_power	Signed, matches EMHASS convention
Spot price	sensor.nordpool_kwh_lv_eur_3_10_021	LV zone, 15-min resolution, has today/tomorrow arrays

Legacy sensors to clean up (not used in EMHASS)

• sensor.deye_pv1_power, sensor.deye_pv1_voltage, sensor.deye_pv1_current
• sensor.deye_pv2_power, sensor.deye_pv2_voltage, sensor.deye_pv2_current
• sensor.deye_total_pv_power, sensor.deye_pv_day_energy, sensor.deye_total_pv_energy
• sensor.total_ev_power, sensor.total_ev_energy (CT clamp readings, not OpenEVSE integration)
• sensor.deye (utility meter, check if still needed)

EMHASS config written

• File: config_emhass.yaml in this repo
• Deploy to HA at: /config/emhass/config_emhass.yaml
• Version targeted: v0.17.1
• Mode: self-consumption, no grid export, no EV (to be added later)
• Key parameters: 32 kWh battery, 11 kW charge/discharge, 16090 W grid limit, 10% min SOC

MCP setup

• Fixed hass-mcp env var (was HATOKEN, needed HA_TOKEN)
• Installed uv/uvx to ~/.local/bin (required by hass-mcp)
• Config stored in ~/.claude.json (local scope, this project)

Completed — 2026-04-06

Config deployment

• Deployed config.json to /addon_configs/5b918bf2_emhass/config.json
• Had to find correct path (newer HA OS uses /addon_configs/{slug}/ not /homeassistant/)
• Fixed sensor: switched to sensor.deye_inverter_mqtt_total_load_power (has history, unlike load_power_no_var_loads)

NordPool integration

• EMHASS v0.17 has no native NordPool sensor support
• Solution: load_cost_forecast_method: "list" + pass price array at runtime
• Automation builds 48-value list from NordPool tomorrow attribute (resampled from 15-min to 30-min)
• Fixed cost added: 0.1437 €/kWh (distribution + VAT)

Files updated on HA

• /addon_configs/5b918bf2_emhass/config.json — EMHASS config
• /homeassistant/configuration.yaml — added rest_command for EMHASS API calls
• /homeassistant/automations.yaml — added emhass_dayahead_optimization automation

Daily automation

• Triggers at 14:30 EET/EEST
• Waits up to 60min for tomorrow_valid == true
• Resamples NordPool prices, adds fixed cost, POSTs to EMHASS
• Runs dayahead-optim → publish-data

Verified working

• sensor.p_pv_forecast — PV forecast (W)
• sensor.p_load_forecast — Load forecast (W)
• sensor.p_grid_forecast — Grid import forecast (W)
• sensor.soc_batt_forecast — Target end-of-day SOC (%)
• sensor.unit_load_cost — First-hour price from NordPool

Remaining / Future

1. Switch load sensor — after sensor.load_power_no_var_loads accumulates 24h+ history, switch back for more accurate EV separation
2. OpenEVSE integration — when charger is connected, add number_of_deferrable_loads: 1 for smart EV charging
3. Legacy sensor cleanup — remove unused sensor.deye_* duplicates from old configuration