EV Charger + Batteria Domestica: Smart Charging with Solar Power

Why combine EV charging and a batteria domestica?

An increasing number of Dutch nuclei familiari have both pannelli solari and an auto elettrica. The logical next step is a batteria domestica to optimally connect the two. Why? Because your EV is tipicamente parked at home in the evening or at night for charging — precisely when your pannelli solari are no longer producing.

With a batteria domestica, you store the surplus energia solare during the day and use it in the evening to charge your car. The result: free driving on energia solare. In this article, we explain how it works, what it costs, and how much you can save.

How does the combination work?

The system works as follows:

• During the day: your pannelli solari generate elettricità. Whatever you do not use directly goes to the batteria domestica.
• Late afternoon: the batteria is full. Any additional surplus is exported to the grid.
• Evening: you arrive home and plug in your EV. The batteria domestica supplies power to the stazione di ricarica.
• Night: once the batteria is empty, the system switches to grid power. With a tariffa dinamica contract, you then charge at the lowest overnight rates.
• Smart management: the sistema di gestione energetica automatically distributes the available power across the nucleo familiare, batteria, and stazione di ricarica.

Load balancing: smart distribution

A crucial aspect of the EV + batteria domestica combination is load balancing. Your nucleo familiare connection (tipicamente 1x25A or 3x25A) has a limited capacità. If you are simultaneously cooking, running the washing machine, and charging your EV, you could trip the fuse.

Dynamic load balancing

Smart stazione di ricaricas measure in real time how much power your nucleo familiare is consuming and automatically adjust the EV's charging power. When you are cooking (3 kW), the charger reduces from 7.4 kW to 4.4 kW. The batteria domestica can provide additional power as a buffer, so your EV charges faster.

Solar charging mode

Many smart stazione di ricaricas offer a solar charging mode: the EV charges esclusivamente on energia solare. Combined with a batteria domestica, this becomes even more effective: the batteria absorbs fluctuations (clouds) so the charging process is not constantly interrupted.

How much do you save?

The savings depend on your driving habits, the number of pannelli solari, and the capacità della batteria. Here is a realistic overview:

With the combination of pannelli solari, batteria domestica, and EV charging, you save up to €1,300 all'anno on charging costs. The batteria domestica contributes by making energia solare available at the moment your car arrives home.

Choosing the right setup

For an optimal EV + batteria domestica setup, we recommend the following:

• Capacità della batteria: at least 10 kWh if you drive 30+ km daily. A full car charge requires 15–30 kWh, so you need sufficient buffer to also power your nucleo familiare.
• Pannelli solari: at least 14–20 panels (6–8 kWp) to generate enough surplus for both home and car.
• Smart charger: choose a stazione di ricarica with dynamic load balancing and solar charging mode (e.g. Easee, Alfen, or Wallbox).
• Dynamic tariff contract: for nights and cloudy days when you still need grid power.

Real-world example

Take a family with 16 pannelli solari (6.4 kWp), an Anker SOLIX X1 with 10 kWh batteria, and an auto elettrica that drives 15,000 km all'anno. Annual production is circa 5,600 kWh. The nucleo familiare consumes 3,500 kWh and the car 3,000 kWh (6,500 kWh total). Without a batteria, 60% of the energia solare would be exported to the grid.

Conclusione

The combination of an caricatore EV and batteria domestica is one of the most profitable energy setups you can achieve as a homeowner. You drive largely on free energia solare, save up to €1,300 all'anno on charging costs, and are less dependent on the energy grid.

Want to know which batteria domestica best suits your EV setup? Request free advice or browse our high-capacità batterie.