Power Manager

Intelligent home energy management for Home Assistant. Optimizes power consumption by automatically controlling devices based on solar production, grid tariffs, and consumption patterns.

Features

• Smart EV Charging: Charges during off-peak hours in winter, uses solar surplus in summer
• Boiler Control: Heats water during off-peak/solar surplus, ensures hot water by deadline
• Pool Heat Pump: Manages pool heating based on season and available power
• Frost Protection: Monitors pool pump during freezing temperatures with alerts
• BMW Low Battery Warnings: Evening alerts if car battery is low and not plugged in
• Belgian Tariff Support: Peak, off-peak, and super-off-peak rate optimization
• Manual Overrides: Force devices on/off via Home Assistant
• Web Dashboard: Accessible from HA sidebar (locally and remotely via ingress)

Installation (HA Add-on)

1. In Home Assistant: Settings > Add-ons > Add-on Store
2. Click three dots > Repositories
3. Add: https://github.com/galletn/PowerManager
4. Find Power Manager and click Install
5. Enable Start on boot and click Start
6. Toggle Show in sidebar to add the dashboard to your menu

The add-on connects to HA automatically via the Supervisor API - no token configuration needed.

Configuration

The add-on works with default settings out of the box. For custom power limits or other settings, create /config/power-manager/config.yaml on your HA instance:

polling_interval: 30  # seconds

max_import:
  peak: 2500       # Watts
  off_peak: 5000
  super_off_peak: 8000

frost_protection:
  enabled: true
  temp_threshold: 5
  notify_entity: "mobile_app_your_phone"

bmw_low_battery:
  enabled: true
  battery_threshold: 50
  check_hours: [20, 21, 22]

Home Assistant Setup

Override Helpers

Add to configuration.yaml or create via UI:

input_select:
  pm_override_boiler:
    name: "PM Boiler Override"
    options: ["Auto", "On", "Off"]
    initial: "Auto"
  pm_override_ev:
    name: "PM EV Override"
    options: ["Auto", "On", "Off"]
    initial: "Auto"
  pm_override_pool:
    name: "PM Pool Override"
    options: ["Auto", "On", "Off"]
    initial: "Auto"

See homeassistant/helpers/helpers.yaml for full list.

API Endpoints

Endpoint	Method	Description
/	GET	Dashboard
/api/status	GET	Current power status (JSON)
/api/override/{device}	POST	Set manual override
/api/health	GET	Health check
/api/limits	GET/POST	View/update power limits
/api/schedule	GET	24-hour schedule

Project Structure

PowerManager/
├── app/
│   ├── main.py              # FastAPI application + decision loop
│   ├── config.py            # Configuration dataclasses
│   ├── models.py            # Data models
│   ├── ha_client.py         # HA REST API client
│   ├── decision_engine.py   # Core decision logic
│   ├── scheduler.py         # 24-hour schedule generator
│   └── tariff.py            # Belgian tariff calculations
├── dashboard/
│   ├── templates/dashboard.html
│   └── static/{style.css, dashboard.js}
├── power-manager-addon/     # HA add-on packaging
│   ├── config.yaml          # Add-on manifest
│   ├── Dockerfile
│   ├── run.sh
│   └── dashboard-ingress.html
├── repository.yaml          # HA add-on repository metadata
├── tests/                   # Pytest tests
├── homeassistant/
│   └── helpers/helpers.yaml # HA override entities
└── requirements.txt

Development

# Install dependencies
pip install -r requirements.txt

# Create config for local dev
cp config.yaml.example config.yaml
# Edit config.yaml with HA token

# Run tests
pytest tests/ -v

# Run with coverage
pytest tests/ --cov=app --cov-report=html

# Run locally
python -m app.main

Controlled Devices

Device	Power	Control
EV Charger (ABB Terra AC)	4-11 kW	On/Off + Amps
Water Heater (Boiler)	2.5 kW	On/Off
Pool Heat Pump	2 kW	Climate mode
Pool Pump	0.5 kW	On/Off (frost)

License

MIT