Flow Power HA

A Home Assistant integration that provides Flow Power electricity pricing sensors for EMHASS optimization.

Features

• Price Sources: Supports both Amber Electric and AEMO (direct wholesale) as price data sources
• PEA Calculation: Implements Flow Power's Price Efficiency Adjustment formula
• Happy Hour Export: Automatic export pricing based on Flow Power Happy Hour (5:30pm-7:30pm)
• EMHASS Compatible: Price forecast sensor with attributes for EMHASS integration
• Configurable: Base rates, network tariffs, and GST options

Installation

HACS (Recommended)

1. Add this repository as a custom repository in HACS
2. Search for "Flow Power HA" and install
3. Restart Home Assistant
4. Add the integration via Settings > Devices & Services > Add Integration

Manual Installation

1. Copy the custom_components/flow_power_ha folder to your Home Assistant custom_components directory
2. Restart Home Assistant
3. Add the integration via Settings > Devices & Services > Add Integration

Configuration

Price Source

Choose between:

• AEMO (Direct wholesale): Fetches prices directly from AEMO NEMWeb
• Amber Electric: Uses your Amber API key for pricing data

Pricing Settings

Option	Default	Description
Base Rate	34.0 c/kWh	Your Flow Power base energy rate
PEA Enabled	Yes	Apply Price Efficiency Adjustment
PEA Custom Value	-	Override calculated PEA with fixed value
Include Network Tariff	No	Add network charges (AEMO mode)
Network Rate	8.0 c/kWh	Flat network usage charge
Other Fees	1.5 c/kWh	Environmental and market fees
Include GST	Yes	Add 10% GST to final price

Sensors

Sensor	Unit	Description
sensor.flow_power_import_price	$/kWh	Current import price with PEA
sensor.flow_power_export_price	$/kWh	Current export price (Happy Hour aware)
sensor.flow_power_wholesale_price	c/kWh	Raw wholesale price
sensor.flow_power_price_forecast	$/kWh	Price forecast for EMHASS

EMHASS Integration

The sensor.flow_power_price_forecast sensor provides attributes compatible with EMHASS:

state: 0.32  # Current price in $/kWh
attributes:
  forecast: [0.32, 0.28, 0.25, ...]  # 48 periods (24h at 30-min)
  timestamps: ["2024-01-01T00:00:00+10:00", ...]
  unit: "$/kWh"

EMHASS Configuration Example

# configuration.yaml
emhass:
  ...
  load_cost_forecast_method: sensor
  sensor_power_load_no_var_loads: sensor.home_load
  # Use the forecast sensor for price optimization

Pricing Formula

PEA (Price Efficiency Adjustment)

PEA = Wholesale (c/kWh) - 9.7
Final Rate = Base Rate + PEA

Where:
- 9.7 = Market Average (8.0) + Benchmark (1.7)
- Default Base Rate = 34.0 c/kWh

Export Rates (Happy Hour)

Region	Happy Hour Rate
NSW1	45 c/kWh
QLD1	45 c/kWh
SA1	45 c/kWh
VIC1	35 c/kWh
TAS1	0 c/kWh

Happy Hour: 5:30pm - 7:30pm local time

Support

For issues and feature requests, please open an issue on GitHub.

License

MIT License