# 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