Smart Energy: How Semi-Grid Battery Systems with Dynamic ESS Drastically Reduce Your Energy Bill
The energy market in Belgium is changing at lightning speed. Dynamic hourly tariffs are becoming the new norm. With a smart semi-grid system, you respond to this perfectly - and save up to €1,200 a year.
What is a Semi-Grid System?
A semi-grid system combines the best of off-grid and grid-connected energy: solar panels, battery storage, smart control and grid connection when advantageous.
Installation example: 3-phase system with Victron & Voltsmile
An example of a just-finished 3-phase installation with Victron MultiPlus-II inverters, MPPT chargers, Voltsmile batteries, GX control and touchscreen monitoring.
Real-time monitoring via VRM
With Victron VRM, you can see in real time how energy is consumed, stored or fed back. Data can be monitored live via web or app.
System structure: Victron + Pylontech Batteries
Besides Voltsmile, we also use Pylontech LiFePO₄ batteries for scalable storage in larger installations. Compatible via CAN bus with Victron.
The Smartness of Dynamic ESS
A Dynamic ESS charges and discharges strategically, not randomly. It takes into account:
- The current dynamic hourly rate
- Available solar production
- Your consumption profile
- Load on the grid
So you charge at low rates (e.g. overnight) and use battery power during peak hours (e.g. 6pm). Less injection, more own consumption, maximum efficiency.
Why now interesting in Belgium?
The combination of dynamic energy contracts and new capacity tariffs makes smart energy storage pay off. With Dynamic ESS, you limit grid losses, reduce your peaks and make optimal use of cheap power.
Case Study 1: Family home with electric car
Situation: 2 adults, 2 children, 5,000 kWh/year, PV system of 5 kWp, electric car.
Solution: 10 kWh Voltsmile battery + Victron MultiPlus + Cerbo GX. Dynamic ESS with dynamic tariff via Tibber.
Results: 65% self-consumption of solar energy, savings of ± €950/year, smart charging of EV.
Case Study 2: SME with daily consumption and weak grid
Situation: Joinery with 3x25A grid connection, PV system, heavy machinery active during the day.
Solution: Victron MultiPlus-II 3-phase, 20 kWh battery (Pylontech), GX control with backup generator.
Results: No grid reinforcement required, 70% local consumption, clear monitoring via VRM.
Savings and efficiency
With a smart Dynamic ESS configuration, an average household can self-cover up to 70% of its power consumption. By using dynamic tariffs smartly, you will save between €500-€1,200 a year.
Indicative configuration and price
- 🔋 10 kWh Voltsmile or Pylontech battery
- ⚡ Victron MultiPlus-II 48/5000 GX inverter
- 🧠 Cerbo GX with VRM monitoring
- 💡 Full coupling to existing PV plant
➡️ From €7,000 excl. VAT
Ready for the future?
With Wire-Up, you get technical expertise, quality components and a future-proof system.
📩 Request your analysis or call us for a no-obligation quote.
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