What is energy storage?
Energy storage is a battery system that stores surplus energy from solar panels or wind turbines. You can use stored energy in the evening, at night, or on cloudy days. It is a key component of a modern energy system that allows you to maximize the use of produced energy.
Modern energy storage systems are technologically advanced devices that not only store energy but also intelligently manage its flow. Thanks to built-in BMS (Battery Management System), the storage automatically decides when to charge, when to discharge, and when to switch to backup mode.
Energy storage technologies
Two battery technologies dominate the market:
Lithium-ion batteries (Li-ion)
Lead-acid batteries (AGM/gel)
When does energy storage pay off?
Energy storage is particularly worthwhile when:
How much does energy storage cost?
Cost depends on capacity and technology:
| Capacity | Technology | Approximate cost | Cycle count |
|---|---|---|---|
| 5 kWh | LFP | €4,000 - €5,500 | 6,000+ |
| 10 kWh | LFP | €6,500 - €9,500 | 6,000+ |
| 15 kWh | LFP | €9,000 - €12,500 | 6,000+ |
| 20 kWh | LFP | €11,500 - €16,000 | 6,000+ |
Combined with PV, battery payback is faster because you increase self-consumption from 30-40% (without storage) to 70-85% (with storage).
How to choose the right capacity?
Capacity selection is key to optimizing your investment:
Energy storage for businesses
For businesses, energy storage is not only about savings but also about power stability and protection against supply interruptions. Applications include peak shaving, energy arbitrage, backup power, grid stabilization, and EV fleet charging buffering.
Summary
Energy storage is an investment that pays off, especially combined with solar. It increases self-consumption, ensures energy security, and reduces bills. Battery prices continue to drop while capacity and lifespan improve. Contact us to find the optimal storage solution for your installation.
