Choosing a PV storage system: How to find the right storage system for your solar system

A power storage system is what makes your PV system truly efficient. But which storage system is right for your energy consumption, your home—and your budget? This guide will show you step by step how to find the right storage solution—explained clearly and with a future-proof approach.

1. Why use a PV storage system at all?

• Increase your self-consumption of solar power
• Less dependence on the electricity provider
• Sustainable energy around the clock

2. What memory size is right for me?

The storage capacity depends on your daily electricity consumption and the performance of your solar system. A rough rule of thumb:

• 1 person: 3–5 kWh storage
• Family household: 5–10 kWh storage
• With electric car or heat pump: 10–15 kWh or more

Tip: If the storage is too small, it will fill up quickly, and if it's too large, it will remain inefficient. Ideally, use a monitoring system for analysis.

3. Lithium or saltwater? A comparison of storage technologies

technology	Advantages	Disadvantages
Lithium-ion	High energy density, long life, compact	Slightly more expensive
salt water	Non-toxic, 100% recyclable, fireproof	Less common, larger

4. How much does a PV storage system cost?

Depending on the size and manufacturer, you can expect to pay approximately €800–1,200/kWh net . Subsidy programs can significantly reduce the investment.

Learn more about 2025 subsidies for PV storage here.

5. When is storage really worth it?

A PV storage system is particularly worthwhile if you:

• uses a lot of electricity in the evenings and at night
• strive for the highest possible level of self-sufficiency
• uses electromobility or heat pumps

Conclusion: Adapt storage size & technology to your everyday life

Every household is different, so choosing the right storage is a personal decision. Focus on quality, scalability, and a good monitoring system.

Discover suitable storage solutions now →