The cost of a 10 kWh battery varies depending on several factors, such as the brand, type of battery technology, quality, and any additional installation costs. On average, you can expect the price for a 10 kWh battery to be somewhere between €5,000 and €10,000.

It's important to emphasize that this is only a rough estimate, and the final costs can vary based on specific brands, models, and regional price differences. Additionally, installation costs, warranties, and any subsidies or discounts may also affect the total investment.

To obtain accurate pricing information, I recommend contacting battery system suppliers or solar energy installers directly. They can provide you with detailed quotes tailored to your specific needs and local market conditions.