A Smarter Home Energy Setup in Germany with 20% Cost Reduction

In a Germany household equipped with a Growatt PV system (1.3 kWp) and a Growatt battery (5 kW / 10 kWh), the enjoyelec HEMS Controller is enabling intelligent and seamless energy management. Integrated with Tibber’s dynamic tariff, this setup has led to an impressive 20% reduction in energy bills over just few months.

The Challenge: Reducing Energy Bills Amidst Market Volatility

For households equipped with solar PV, batteries, and EVs, reducing electricity costs is often a top priority — but achieving this is far from simple. Dynamic tariffs offer savings potential, yet without intelligent control, users risk charging during expensive peak hours or wasting cheap solar energy. Battery schedules based on static logic or manual settings fail to capture real-time opportunities, leading to higher bills and lower system returns. In such a volatile market environment, homeowners need more than hardware — they need intelligence.

enjoyelec’s Smart Solution

With enjoyelec’s HEMS Controller, energy assets are no longer managed in isolation. Instead, they work together under the guidance of advanced AI algorithms that balance real-time pricing signals, user demand, and energy availability.

Key Features in This Case:

✅ Self-Consumption Optimization

During sunlight hours, solar energy powers the home first. Any surplus is stored in the battery for later use — without needing to consider market prices, ensuring clean and cost-free energy use.

✅ AI-Powered Battery Strategy

The HEMS continuously analyzes dynamic tariff electricity price trends and user behavior to determine the best times to charge or discharge the battery. This AI-driven approach captures price arbitrage opportunities and avoids costly grid drawdowns during peak times, maximizing savings under real-time pricing conditions.

Results:

  • 20% savings on energy bills
  • Maximum use of pv, battery and heat pump
  • Improved battery ROI through intelligent scheduling
  • Reduced reliance on the grid

This case highlights how enjoyelec’s intelligent HEMS solution brings together local energy resources and real-time market conditions to deliver both cost savings and energy resilience.