In recent years, the installation of photovoltaic systems in residential and commercial properties has increased dramatically in Greece. With the change to the Net Billing framework, investors and homeowners are increasingly interested in adding energy storage batteries to their systems. In 2025, the question we often hear is: Is energy storage with batteries financially worthwhile, or is it still a luxury?
1. How have battery prices fallen?
Over the past two years, the cost of lithium batteries has fallen significantly, by around 40% by 2024, and this decline is expected to continue in 2025. This trend significantly reduces the cost per kilowatt-hour of stored energy and improves the financial viability of the investment.
Although the upfront cost remains higher than that of basic photovoltaic systems without storage, the overall reduction in costs makes batteries more affordable than ever.
2. Financial benefits and payback
Payback depends on factors such as:
- the price of electricity,
- the household or business’s energy consumption,
- the availability of subsidies,
- how the system is used (e.g. evening consumption, peak shaving).
A photovoltaic system with a 5kWh battery may cost more to install, but annual savings can be substantial when purchases of electricity from the grid are reduced, especially during periods of high prices. Without a subsidy, payback can take 10–15 years, but tax breaks or subsidies can reduce this to 7–10 years.
3. Subsidies and financing tools in Greece
In 2025, programs are available to support the installation of storage systems combined with photovoltaics, particularly for businesses:
- Subsidies of up to 50% of the cost for small businesses and up to 30–40% for medium-sized and large businesses.
- These programs cover not only equipment but also consulting services and connection costs.
For homeowners, although major subsidy programs are primarily aimed at businesses, there are tax breaks that can reduce the net installation cost.
4. Technical benefits: autonomy & reliability
In addition to the financial benefits, batteries offer:
- Energy independence: Using all the solar energy generated, without sending it to the grid.
- Backup during power outages: Especially useful in areas with frequent outages.
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Load management: Storing energy for use during peak hours, when consumption is high.
These technical advantages are valuable even when payback is slow, and are a factor many investors appreciate.
5. Is it a luxury or an investment in 2025?;
It is no longer just a luxury. The battery market has matured enough for batteries to be considered a sound investment for many photovoltaic system owners:
- When there is active energy use in the evening or a need for backup.
- When subsidies or tax incentives are used.
- When electricity consumption is high and grid prices are expensive.
The overall trend in Europe and internationally points to a steady increase in the use of batteries alongside photovoltaic systems, with forecasts indicating significant market growth throughout the coming decade.
Would you like to find out whether a battery is worthwhile for your home or business?
Solar Home provides planning, installation, and support for photovoltaic systems with storage, tailored to your actual needs.
