Initial commit — EMHASS + Deye + NordPool setup

- EMHASS config for Deye SUN-12K + 32 kWh battery, NordPool LV
- Day-ahead optimization automation (14:30 daily) with real battery SOC init
- Forecast vs reality template sensors and dashboard card
- Migration log from Domoticz

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

migration_log.md

@@ -0,0 +1,76 @@
+# 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