Dynamic Strategy Setup

The dynamic flow is provided for automated charging/discharging based on changing hourly rates. This is only relevant if you have a dynamic/hourly contract.

How it works

The strategy will periodically check for new tarif data from your supplier. It will use charge during the cheapest hours of this day. And charge using your charge settings. It will use self-consumption during the most expensive hours of the day, if the price delta is big enough. Outside of these periods it will use charge PV to capture any surplus (cheap) solar power.

View the explanation videos of the general idea behind this strategy:

• How to SETUP dynamic: English text and subtitles, NL spoken: https://youtu.be/PR1XA5GUlAE
• How to USE dynamic: English text and subtitles, NL spoken: https://youtu.be/PR1XA5GUlAE

SETUP - getting dynamic up and running

1. Install Cheapest Energy Hours if you have not done so already
2. Provide data from your Energy supplier to Home Assistant. See this easy list with addons from TheFes.
   • Follow any instructions provided by the Data Provider addon.
3. Import the 02 strategy-dynamic.json flow into Node-RED and deploy
4. Go to your Home Battery Control dashboard in HA
   • Select Full control and Dynamic to activate the strategy
5. Go to 2nd tab, this shows timed and dynamic planning
   • Select your energy supplier from the dropdown
   • The dashboard should (with a small delay) display when it will be charging/idle/discharing in the next 24 hrs.
6. Minimum price delta
   • Leave the price delta at €0,06/kWh or set it to your desired value
   • For a Marstek bought at ~ €1250, 6000 cycles at 88% DoD and an 80 RTE = delta at €0,06/kWh
   • If you charge largely using solar power, you can lower the price delta down to €0,00/kWh

Done.

USE - the dynamic strategy

Strategy behavior per period

• Default: Uses Charge PV to capture surplus solar power
• Cheapest hours: Uses Charge to charge from grid at lowest rates
• Expensive hours: Uses Self-consumption to discharge and reduce grid usage (only if minimum price delta threshold is met)

Note the dynamic and timed strategy share settings for charge / charge pv / self-consumption.

Dashboard controls

Energy supplier / Data source

• Select your energy supplier from the dropdown to fetch hourly pricing data
• The system needs this to determine when to charge and discharge

Minimum price delta (€/kWh)

• The minimum price delta is required between cheap and expensive hours before the battery will discharge
• Set based on your battery’s round-trip efficiency and cost per cycle
• Lower this value if you charge primarily with solar power

Cheapest hours (number)

• How many of the cheapest hours per day to use for charging from grid
• The system automatically finds the cheapest consecutive hours in your data source (often: the current and next day)

Expensive hours (number)

• How many of the most expensive hours per day to use for self-consumption (discharging)

• The system automatically finds the most expensive block of consecutive hours in your data source (often: the current and next day)

• Only activates if the minimum price delta threshold is met. Otherwise grid power is cheaper than the energie stored in your battery.
  • it will remain in charge PV mode during expensive hours if the threshold is not met.

FAQ

• (Optional) guarantee self-consumption during expensive hours?
  • Set the minimum price delta to €0,00 if you always want to switch to self-consumption during expensive hours.
• (Optional) want self-consumption throughout the day?
  • Set expensive hours to 24 - cheapest hours. E.g. you charge during 2 cheapest hours? Set expensive to 24 hrs - 2 hrs = 22 hrs
  • Set minimum price delta to €0,00 to make sure the strat activates.

Period start/end times (read-only)

• Shows when the cheapest and expensive periods start and end
• Automatically calculated by the system based on your energy price data

Average tariffs display

• Expensive period: Shows the average price during discharge hours
• Charged at: Shows the average price during charging hours
• Price delta: The difference between expensive and cheap periods

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