Flow Power HA

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

Features

• Price Sources: Supports AEMO (direct wholesale), Amber Electric, and Flow Power portal login
• Flow Power Portal: Login directly to your Flow Power account to get actual PEA, LWAP, and TWAP values from Flow Power's billing system
• Connect Anytime: Already set up with AEMO or Amber? Connect your Flow Power portal from the integration options — no need to reconfigure
• 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
• Dynamic TWAP: Auto-calculated 30-day rolling wholesale average for accurate PEA
• Configurable: Base rates and PEA settings

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
• Flow Power (Portal login): Logs into your Flow Power account at flowpower.kwatch.com.au to fetch actual account data (PEA, LWAP, TWAP, DLF). Uses AEMO for real-time spot prices and forecasts. Requires SMS MFA during setup.

Flow Power Portal

The Flow Power portal provides actual account-specific values directly from Flow Power's billing system, rather than calculated estimates. When connected, the integration uses Flow Power's real TWAP for more accurate PEA calculations across all price sources.

Setup during initial configuration

1. Select "Flow Power (Portal login)" as your price source
2. Enter your Flow Power portal email and password
3. Enter the SMS verification code sent to your registered phone number
4. Select your NEM region and configure pricing

Connect to an existing integration

Already set up with AEMO or Amber? You can connect your Flow Power portal account without removing the integration:

1. Go to Settings > Devices & Services > Flow Power HA > Configure
2. Toggle "Connect Flow Power portal account"
3. Submit, then enter your portal email and password
4. Enter the SMS verification code

Re-authentication

Portal sessions expire over time. If your session expires:

1. Go to Settings > Devices & Services > Flow Power HA > Configure
2. Toggle "Re-authenticate with Flow Power portal"
3. Submit, then re-enter your credentials and SMS code

The integration continues to work with calculated TWAP while the portal session is expired — re-authenticating simply restores the actual values.

Pricing Settings

Option	Default	Description
Base Rate	34.0 c/kWh	Your Flow Power base energy rate (GST inclusive, as per PDS)
PEA Enabled	Yes	Apply Price Efficiency Adjustment
PEA Custom Value	-	Override calculated PEA with fixed value (c/kWh)

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 spot price
sensor.flow_power_price_forecast	$/kWh	Price forecast for EMHASS
sensor.flow_power_twap	c/kWh	30-day rolling average wholesale price (TWAP)
sensor.flow_power_account_pea_actual	c/kWh	Actual PEA from Flow Power portal (portal only)

Account PEA Sensor Attributes

When the Flow Power portal is connected, the Account PEA sensor exposes these attributes:

Attribute	Description
lwap	Load-Weighted Average Price (c/kWh)
lwap_import	LWAP for imports only (c/kWh)
twap	Time-Weighted Average Price (c/kWh)
twap_import	TWAP for imports only (c/kWh)
avg_rrp	Average spot price (c/kWh)
pea_30_days	30-day PEA net (c/kWh)
pea_30_import	30-day PEA import only (c/kWh)
pea_actual	Current PEA (c/kWh)
pea_target	PEA target (c/kWh)
site_losses_dlf	Distribution Loss Factor
gst_multiplier	GST multiplier
avg_usage_kw	30-day average demand (kW)
avg_import_usage_kw	30-day average import demand (kW)
max_usage_kw	Maximum demand (kW)

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 - TWAP - BPEA
Final Rate = Base Rate + PEA

Where:
- TWAP = 30-day rolling average of wholesale spot prices (dynamic)
        or actual TWAP from Flow Power portal when connected
- BPEA = 1.7 c/kWh (Benchmark Price Efficiency Adjustment)
- Default Base Rate = 34.0 c/kWh
- When insufficient data (<1 hour), TWAP defaults to 8.0 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