Plan, build and optimise energy storage systems that deliver financial returns and resilient power.
We deliver turnkey battery energy storage system BESS solutions for commercial, industrial and utility-scale projects.
Whether you want to add battery storage to a new solar PV project, upgrade an existing solar power plant, or install a standalone BESS, we manage the complete process, from feasibility and design to permitting, construction, commissioning, monitoring and maintenance.
Our battery storage solutions help you lower energy costs, increase self-consumption, improve power reliability and access new revenue streams through energy trading, flexibility services and grid support.
Planning a BESS project?
Tell us about your site, energy needs and business goals. Our experts will prepare an initial ROI assessment and recommend the best battery storage solution for your project.

We support every stage of your battery energy storage project, helping you reduce risk, improve performance and maximise long-term returns.
Before you invest, you need to know how your battery storage project can perform.
We provide detailed BESS modelling, revenue forecasts and ROI calculations based on your site, energy use, market conditions and project goals. Our analysis compares different technical and commercial scenarios so you can understand the risks, expected returns and best route forward.
From peak shaving and self-consumption to energy trading and ancillary services, we help you identify where your BESS can create the most value.
Want to understand the income potential of BESS in key CEE markets? Download our latest BESS Monthly Financial Analysis.
Successful battery storage projects start with the right site, permits, grid connection and commercial structure.
Photon Energy supports the early-stage development of standalone BESS and hybrid solar-plus-storage projects. We help secure land rights, manage regulatory approvals and obtain grid connection agreements for both behind-the-meter and front-of-the-meter projects
We identify suitable project locations and help secure land access for your battery storage installation.
We manage local approvals, construction permits, environmental requirements and fire safety compliance.
We secure grid connection agreements and ensure your project meets technical requirements for safe and reliable integration.
Our EPC services turn your BESS project from plan into a fully operational energy storage asset.
We deliver turnkey battery energy storage systems for standalone projects, solar-plus-storage installations and PV plant retrofits. With strong regional expertise in Central and Eastern Europe, we focus on safety, quality, performance and long-term reliability.
We select proven Tier 1 battery technologies, including cabinet and containerised high-voltage systems from 215 kWh to multi-MWh utility-scale solutions.
We manage the full construction process, from groundwork and installation to commissioning, testing and handover.
We connect your BESS to existing energy infrastructure and ensure stable, compliant and efficient operation.
A battery energy storage system needs expert care to stay safe, efficient and profitable.
We provide complete lifecycle support for BESS assets, including remote monitoring, maintenance, system optimisation and performance reporting. Our goal is to maximise uptime, protect battery health and extend the operational life of your investment.
We monitor your system in real time, manage alarms, support dispatch and provide regular performance reports.
We carry out scheduled inspections, firmware updates, fault response and spare parts management.
We continuously assess battery health, system efficiency and operating strategy to improve long-term performance.
Our process is designed to reduce risk and improve project returns.
First, we assess your site, load profile, energy costs and business goals. Then we design a tailored battery storage solution that fits your budget, power needs and future growth plans.
Your BESS can be designed for backup power, peak shaving, self-consumption, energy trading or a combination of applications.
Fill out our appointment form and share your project details. We will prepare an initial ROI assessment before scheduling a consultation.
Get the latest insights on battery energy storage system profitability in our BESS white paper.

Our BESS 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.