The ultimate "Set & Forget" automation for home batteries with dynamic energy tariffs.
This blueprint turns your Home Assistant into an intelligent energy manager. It calculates the optimal charging schedule based on day-ahead prices (Frank Energie, Tibber, Zonneplan), solar forecasts, and your battery usage.
It solves the "Empty Battery Anxiety" by guaranteeing a charged battery in the morning, while still optimizing for the lowest possible costs during the rest of the day.
- 🧠 Intelligent Scheduling: Analyzes prices for today and tomorrow to find the absolute cheapest hours.
- ☕ Morning Guarantee: Ensures you wake up with a charged battery (e.g., 50%) for the morning peak, prioritizing cheap night hours, even if the afternoon is cheaper.
- ☀️ Solar Forecasting: Automatically adjusts charge targets based on the weather. Expecting sun? It leaves space in the battery. Dark winter day? It charges fully from the grid.
- 💰 Smart Holding (Trading Logic): Prevents the battery from discharging (or charging) when it's not profitable. It remembers your buy price and only allows usage if the current price exceeds the
Buy Price + Profit Margin. - 🛡️ Hardware Protection: Includes "Anti-Cycling" logic. Once charging starts, it stays active for at least 30 minutes to protect your inverter's EEPROM/Flash memory from excessive switching.
- 📊 Daily Reporting: Sends a detailed plan to your phone every morning and evening (Status, Financial thresholds, Scheduled hours).
- 🌍 Multi-Language: Fully localized in English and Dutch (Nederlands).
Before importing this blueprint, ensure you have the following in Home Assistant:
- Dynamic Price Sensor: An integration that provides current and future electricity prices (e.g., Frank Energie, Tibber, ENTSO-e). The sensor must have a
prices(or similar) attribute containing future data. - Solar Forecast: The standard Forecast.Solar integration (configured for your location).
You must create one helper manually for the "Smart Holding" logic to work. Go to Settings > Devices & Services > Helpers > Create Helper:
-
Input Number (Required):
- Name:
Last Purchase Price(or Laatste Laadprijs) - Icon:
mdi:currency-eur - Min:
0, Max:5 - Step:
0.001 - Purpose: The automation saves the electricity price here when it starts charging, so it knows when it's profitable to hold or discharge later.
- Name:
-
Input Boolean (Optional):
- Name:
Battery Boost - Purpose: A manual switch to force-charge the battery to 100% immediately, ignoring all logic.
- Name:
- Click the Import to Home Assistant badge above (or copy the URL of the yaml file).
- Create a new automation using the blueprint.
- Map your entities (Battery SoC, Switches, Price Sensor).
- What is it? The minimum percentage you need to survive the morning peak (07:00 - 12:00).
- How it works: If it's night and your battery is below this level, the system will charge during the cheapest night hours, even if the price is effectively "high" compared to the afternoon.
- Recommended:
40%-60%.
- What is it? The financial buffer.
- How it works: The system calculates the strict hours needed to reach your target. Any extra "buffer" hours are only charged if the price is
X%lower than the daily average. - Recommended:
5% - 10%: Focus on comfort (Full battery is priority).20%+: Focus on ROI (Only charge when it's a steal).
- What is it? The boundary between a "Sunny Day" and a "Dark Day".
- How it works:
- Forecast > Threshold: Uses Target Summer (e.g., 30%). Leaves room for free solar energy.
- Forecast < Threshold: Uses Target Winter (e.g., 90%). Fills up from the grid.
Every 5 minutes (and on price changes), the automation performs this check:
- Safety Check: Are we in a valid time slot (Night/Day)?
- Morning Check: Is it night, and is SoC <
Morning Guarantee?- Yes: Find cheapest hours in the Night Slot to bridge the gap. -> Charge.
- Target Check: Is SoC <
Daily Target(Winter/Summer)?- Yes: Calculate total hours needed. Find cheapest hours in All Slots (Night + Day).
- Strict Check: Is current price one of the absolute cheapest? -> Charge.
- Buffer Check: Is current price profitable (
< Daily Average - Margin)? -> Charge.
- Holding Check: If we are NOT charging:
- Is current price < (
Last Buy Price+Margin)? -> Block Discharge (Hold energy). - Is current price High? -> Allow Discharge (Save money).
- Is current price < (
Q: I see "No charging planned" in the report, but the price is low. A: The price might be low, but the system sees even lower prices coming up later in your allowed time slots. It waits for the bottom.
Q: Why does it keep charging for 30 minutes even if the price went up? A: This is the EEPROM Protection. To prevent your inverter hardware from wearing out due to constant switching, the charger enforces a minimum runtime of 30 minutes (unless the battery reaches 100%).
Q: The report says "Morning" and "Strict". What's the difference?
A: Morning means charging is forced to ensure you survive the morning. Strict means charging is purely based on the absolute lowest prices of the next 24-36 hours.
If this blueprint saves you money on your energy bill, consider buying me a coffee! It helps me maintain the code and add new features like active trading logic.
This project is licensed under the MIT License - feel free to modify and share.
- Version: 1.0 (Production)
- Author: PwnyPower