Energy Storage - Profitability Analysis and Benefits Combined with Photovoltaics in 2025
In the face of dynamic changes in the energy sector, rising electricity prices, and the evolution of prosumer settlement systems, energy storage is increasingly considered as part of home energy systems. Investing in energy storage can significantly increase a household's energy autonomy, but it comes with additional costs. In this article, we provide a comprehensive analysis of the profitability of energy storage combined with photovoltaic installations, taking into account current prices, available subsidies, payback period, and long-term economic benefits.
Basic Information about Energy Storage
An energy storage system is a device that allows you to store surplus electricity generated by a photovoltaic installation and use it during periods of increased demand or when solar production is limited. In practice, energy storage enables independence from daily fluctuations in solar energy production.
Current Energy Storage Prices in 2025
- Small energy storage (5 kWh): from about 13,000 PLN
- Medium energy storage (10 kWh): from 20,000 to 50,000 PLN
- Larger energy storage (20 kWh): from 40,000 to 60,000 PLN
It is worth noting that the renewable energy market is currently seeing a price drop – in some cases even by 30-40% compared to previous years. This is therefore a favorable time to invest in energy storage technologies.
Ready-made Photovoltaics + Energy Storage Sets
- 5 kW installation with energy storage: from 40,990 PLN gross with installation
- 6 kW installation with energy storage: from 42,990 PLN gross with installation
- 10 kW installation with energy storage: from 49,990 PLN gross with installation
Installing energy storage together with photovoltaics can reduce the total investment cost by up to 30% compared to installing these solutions separately.
Self-Consumption – The Key to Profitability
In a typical household without energy storage, the self-consumption rate rarely exceeds 20-30%, meaning most of the generated energy is fed into the grid. This is due to the lack of synchronization between energy production (highest around noon) and consumption (highest in the morning and evening).
Using energy storage allows you to radically increase the level of self-consumption:
- With energy storage, self-consumption can rise to 55%
- In optimal conditions, this rate can reach even 80-90%
Payback Time
According to available data, the payback period for photovoltaics alone (without energy storage) is about 6.5 years, assuming no subsidies. Adding energy storage extends this period to about 10.5 years. Although the payback time is longer, it is worth considering the long-term benefits and changes in prosumer settlement conditions.
Available Subsidies in 2025
The "My Electricity" program in previous editions offered subsidies of up to 50% of the cost of purchasing and installing energy storage (up to 16,000 PLN). The sixth edition of the program is planned for mid-2025.
Summary
Investing in energy storage combined with a photovoltaic installation, despite higher initial costs, can bring significant economic benefits in the long run. The key argument for such a solution is the drastic increase in self-consumption, which translates into lower electricity bills.