The cost of a home battery varies depending on several factors, such as the battery's capacity, brand, model, and any additional components. In general, the cost of a home battery can range from a few thousand euros to tens of thousands of euros. Here are some guidelines:

1. Capacity: Batteries have different storage capacities, expressed in kilowatt hours (kWh). The larger the capacity, the higher the price usually is. The required capacity depends on your energy consumption and the desired level of energy independence.

2. Brand and model: There are various brands and models of batteries on the market, each with their own price levels. Well-known brands such as Tesla, LG Chem, Sonnen, and Enphase often have higher prices due to their reputation and quality.

3. Additional components: Purchasing a home battery may involve additional costs for inverters, charge controllers, cables, mounting brackets, and other accessories needed for the installation and connection of the battery to your home's electrical system.

4. Installation costs: In addition to the cost of the battery itself, there may be installation costs, such as labor costs for the installation and any electrical adjustments needed. These costs can vary depending on the complexity of the installation and the specific requirements of your home.

It is advisable to request quotes from different suppliers and possibly consult a professional installer to obtain an accurate price estimate based on your specific needs and situation.