Energy Storage Solutions

Battery Energy Storage Systems

Plan, build and optimise energy storage systems that deliver financial returns and resilient power.

Battery Energy Storage Systems

Smart Battery Storage for Businesses, Industry and Utilities.

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.

What We Offer

End-to-end Solutions for Battery Energy Storage Systems

We support every stage of your battery energy storage project, helping you reduce risk, improve performance and maximise long-term returns.

Modelling and Financial Analysis

We analyse your site, energy profile and market opportunities to estimate project performance, revenue potential and return on investment.

Project Development & EPC Services

We develop, design and build standalone BESS, solar-plus-storage projects and battery retrofits for existing PV plants.

Permits & Approvals

We manage grid connection, construction permits, fire safety requirements and environmental approvals.

Operations and Maintenance (O&M)

We keep your battery storage system performing safely and efficiently with preventive maintenance, inspections and spare parts management.

24/7 Remote Operations

We monitor your system around the clock, manage alarms, support dispatch and provide clear performance reporting.

Renewable Energy Offtake

We purchase electricity from renewable energy assets of 100 kWp or more, helping asset owners secure reliable offtake.

BESS Modelling and Financial Analysis

Make Confident Investment Decisions with Clear BESS Revenue Forecasts

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.

BESS Project Development

Develop Your Battery Storage Project with Less Risk and More Certainty 

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

Land and Site Acquisition 

We identify suitable project locations and help secure land access for your battery storage installation.

Permitting and Licensing 

We manage local approvals, construction permits, environmental requirements and fire safety compliance.

Grid Connection 

We secure grid connection agreements and ensure your project meets technical requirements for safe and reliable integration.

EPC Services for BESS

Build High-Performance Battery Storage Systems

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.

Technology Selection 

We select proven Tier 1 battery technologies, including cabinet and containerised high-voltage systems from 215 kWh to multi-MWh utility-scale solutions.

Construction & Commissioning

We manage the full construction process, from groundwork and installation to commissioning, testing and handover.

Grid Integration 

We connect your BESS to existing energy infrastructure and ensure stable, compliant and efficient operation.

Operations and Maintenance

Keep Your Battery Storage Asset Performing at Its Best

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.

24/7 Remote Monitoring & Dispatch

We monitor your system in real time, manage alarms, support dispatch and provide regular performance reports.

Preventive & Corrective Maintenance

We carry out scheduled inspections, firmware updates, fault response and spare parts management.

Performance & Health Optimization

We continuously assess battery health, system efficiency and operating strategy to improve long-term performance.

BESS Applications

How Battery Energy Storage Creates Value

Revenues

Create new income streams through energy trading, price arbitrage, flexibility services and fast frequency response markets.

Savings

Reduce electricity costs with peak shaving, load shifting and higher self-consumption of your own renewable energy.

Resilience

Protect your operations with backup power, microgrid capability and reliable energy supply during grid disruptions.

How We Work

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.

Why Us?

Why Choose Photon Energy for Your BESS Project?

Transparency

We provide realistic project assessments, clear financial expectations and practical recommendations.

Tailored Solutions

Every BESS project is designed around your site, energy profile, business goals and local market conditions.

Premium Technology

We work with trusted technology partners to deliver safe, reliable and high-performing battery storage systems.

Local Expertise

Our regional teams understand permitting, grid connection and market conditions across key CEE markets.

BESS Financial Analysis

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. 

What’s Inside the BESS white paper? 

  • Revenue potential analysis for storage systems in key European markets 

  • Breakdown of income sources, including ancillary services and day-ahead market arbitrage 

  • Comparison of results from the previous month

Download the white paper now to make informed investment decisions and stay up to date on the energy storage market. 

From time to time, we would like to contact you about our solutions and other information that might be of interest to you. You can unsubscribe at any time.

Our Energy Storage Solutions in Action

Frequently Asked Questions

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.

Unlock the potential of battery energy storage

Fill out our appointment form to share your goals. We will prepare an initial ROI analysis for your BESS project before scheduling a meeting.

Arrange a consultation today

Interested in BESS project? Contact us

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