Plan, build and optimise energy storage systems that deliver financial returns and resilient power.
We deliver turnkey battery energy storage (BESS) solutions for commercial & industrial sites and utility-scale projects. Add energy storage to a new PV project, retrofit an existing solar power plant, or deploy a standalone battery system. We handle everything from design to commissioning and beyond.
Planning a BESS project or looking to optimize your energy strategy?
Tell us about your goals and book a consultation with our experts today.

Comprehensive services covering the full lifecycle of energy storage systems, ensuring optimised performance and returns.
We provide detailed performance simulations and revenue predictions for energy systems projects. Our analysis includes precise ROI calculations, scenario comparisons to mitigate financial risks, and insights into localized market trends to ensure your BESS investment is financially sound and sustainable.
Want up-to-date insights on the income potential of BESS in Key European markets? Download the BESS Quarterly Financial Analysis.
Photon Energy’s project development services cover every aspect of early-stage project preparation. We specialise in securing land rights, permits, and grid connection agreements, and all necessary regulatory approvals for battery storage and hybrid solar-plus-storage projects, whether behind-the-meter or front-of-the-meter.
We identify optimal locations and secure access to land for your installation.
Our team manages all regulatory approvals and compliance with local requirements, including construction and environmental permits and adherence to fire safety standards.
We obtain connection agreements and ensure your project meets technical standards for grid integration.
Our EPC services take your battery energy storage system from plan to reality. We deliver turnkey BESS solutions - standalone, integrated with PV, or as retrofits - combining regional expertise in CEE with a focus on quality, performance, and safety.
We utilize premium Tier 1 technology, offering high-voltage battery systems in cabinet or containerized configurations ranging from 215 kWh to multi-megawatt (MW/MWh) utility-scale solutions.
From groundwork to commissioning, we ensure the installation is completed on time, within budget, and includes full grid-code testing.
Seamless integration of your BESS with the existing energy infrastructure for optimal performance and stability.
Leveraging years of experience, we provide comprehensive lifecycle management to ensure the peak performance and longevity of your BESS.
Continuous system oversight through real-time alarm management, professional dispatch services, and detailed performance reporting to maximize uptime.
Scheduled on-site inspections, firmware updates, and rapid-response corrective actions, including full spare parts management.
Continuous battery health assessments and system fine-tuning to maintain maximum efficiency and extend the asset’s operational lifespan.
Access diverse and scalable revenue streams by integrating your asset with advanced trading platforms through the Photon Energy Virtual Power Plant.*
From start to finish, Photon Energy will ensure your BESS installation is optimised for revenue generation.
Buy energy during low-demand periods and sell it when prices rise, generating profit.
Earn compensation providing ancillary services, stabilising voltage and frequency to support grid stability.
Generate income providing capacity during periods of peak demand (valid in Poland).
*Our Virtual Power Plant solutions are currently available in the Czech Republic, Hungary and Poland. Contact our team for country-specific information.
Our process minimizes risk and maximizes ROI. We assess your site, load profile, and energy targets. Then we design a customized battery system (including optional PV) that fits your budget, power goals, and scalability, whether it’s for backup, peak shaving, or energy trading.
Fill out our appointment form to share your goals. We will prepare an initial ROI analysis for your BESS project before scheduling a meeting.
Get the latest insights on battery energy storage system profitability in our BESS white paper.

Our BESS Quarterly Financial Analysis provides a comprehensive financial evaluation of 1MW/1MWh and 1MW/2MWh battery storage systems across the Czech Republic, Hungary, Poland and Romania.
Download the white paper now to make informed investment decisions and stay up to date on the energy storage market.
What is a battery energy storage system (BESS)?
A battery energy storage system (BESS) is technology that stores electrical energy in batteries for later use. It helps balance the supply and demand of electricity, supporting the stability of the electrical grid.
How does battery energy storage support the renewable energy transition?
Battery energy storage systems allow excess energy generated from renewable sources to be stored and used when needed. This enhances the efficiency of clean energy systems, which are less predictable than traditional energy sources, and reduces our reliance on fossil fuels.
How does a BESS generate revenue?
A well-optimised BESS can generate revenue through multiple streams, including energy arbitrage, frequency regulation, and participation in capacity markets. Our energy trading and Virtual Power Plant (VPP) solutions help maximise these financial opportunities.
How long do battery storage systems last?
The lifespan of a BESS depends on the technology used, operational conditions, and maintenance. Most lithium-ion battery systems have a lifespan of 10-15 years, with proper monitoring and care extending their efficiency over time.
Can BESS be integrated with existing energy infrastructure?
Yes, our BESS solutions are designed to integrate seamlessly with existing power infrastructure, whether for commercial, industrial, or utility-scale applications. We customise each system to fit the specific needs of our clients.
Can I expand my BESS later if my energy needs grow?
Yes, it’s usually possible to expand your battery storage system down the line – but it depends on how much space and capacity was planned from the start. If there’s enough room at your site, adding more batteries is straightforward.
That said, some parts of the system, like the PCS (power conversion system) or transformer, might limit how much you can expand. To make future upgrades easier, it’s a good idea to plan for potential expansion during the design and engineering phase. Otherwise, upgrades later might require replacing key components like the transformer.
Fill out our appointment form to share your goals. We will prepare an initial ROI analysis for your BESS project before scheduling a meeting.