Revenue stacking, trust, and performance: What it takes to win Europe’s C&I market

Europe’s solar and storage growth is increasingly being shaped by energy security, self-consumption economics, and downstream market requirements rather than installation volumes alone. Recent developments, including renewed concerns over energy security following disruptions around the Strait of Hormuz, Germany’s proposed FiT reform for small rooftop systems, and the European Union’s increasing scrutiny of high-risk inverter suppliers for publicly funded projects, are reinforcing the strategic value of local solar generation, storage, and intelligent energy management.

According to the EUPD Global Energy Transition (GET) Matrix^©, annual European (26 markets) storage deployments are expected to increase from approximately 32 GWh in 2025 to 57 GWh in 2026e, reflecting the growing importance of flexibility and self-consumption across the energy system. Growth is particularly strong in the Commercial and Industrial (C&I) segment, where storage deployments are projected to increase by 78% year-on-year in 2026, as businesses seek greater control over energy costs, resilience, and long-term competitiveness. As project economics increasingly depend on self-consumption optimisation, flexibility services, and broader revenue stacking opportunities, investment decisions are extending beyond technology selection alone. For manufacturers, this means that factors such as downstream trust, supplier reliability, financial stability, and long-term performance are becoming increasingly important alongside system economics, making a deeper understanding of market expectations critical for success in Europe’s next phase of solar and storage growth.

Downstream Sentiment Signals Continued C&I Market Momentum

Recent findings from EUPD Research’s Ad Hoc Business Climate Survey indicate that market fundamentals remain supportive across Europe’s downstream solar industry. The survey collected responses from 226 installation companies, with 50% active in the commercial segment and 12% active in the industrial segment, providing a strong indication of current C&I market sentiment.

Across all surveyed companies, 42% reported inquiry volumes above normal seasonal levels, while 68% expect inquiries to remain stable or increase over the next three months. Markets such as Italy, the United Kingdom, and the Netherlands currently demonstrate some of the strongest demand signals, with future demand expectations exceeding current demand levels across most surveyed countries.

At the same time, the downstream market remains operationally prepared for further growth. Installers reported project closing rates of approximately 40–50% across most major European markets, while average utilization levels remain below full capacity, ranging from approximately 42% to 68% depending on the market. Together, these findings suggest that the European installer and EPC landscape continues to maintain both the confidence and execution capacity required to support further growth in C&I solar and storage deployment.

Integrated Energy Solutions and Revenue Stacking Reshape the C&I Business Case

One of the most significant developments in Europe’s C&I market is the shift from standalone solar installations toward energy optimization. As dynamic tariffs, time-of-use pricing, and energy cost volatility become increasingly relevant, battery storage is strengthening project economics through higher self-consumption, reduced grid dependency, and broader revenue stacking opportunities. Combined with energy management systems (EMS), these solutions enable businesses to optimise energy usage across multiple value streams, further improving the long-term business case for solar and storage investments.

In line with our recent analysis highlighting the residential market’s shift toward upgrades, storage integration, and intelligent energy systems, similar developments are becoming increasingly visible in the C&I segment. Insights from the newly released EUPD C&I EPCMonitor^© 2026 indicate that 75% of surveyed EPCs already offer energy management systems alongside their solar business, while 59% have expanded into EV charging infrastructure and 47% into smart grid integration solutions. These findings suggest that EPCs are increasingly evolving beyond traditional solar installation toward broader energy management and optimisation services.

The transition extends beyond technology portfolios into new business models. Survey responses indicate strong adoption of Solar-plus-Storage PPAs and Storage-as-a-Service offerings, both reported by approximately 80% of participating EPCs, while flexibility and virtual power plant participation continue to create additional revenue opportunities for asset owners. For manufacturers, this evolution increasingly links market success not only to product performance, but also to software compatibility, system integration capabilities, and long-term partnership models. Reflecting this trend, technology and manufacturing providers accounted for 81% of all strategic partnerships established by surveyed EPCs since 2023, highlighting the increasingly important role of supplier collaboration in enabling integrated energy solutions.

EPCs and Installers Identify Consistent Brand Performers

The EUPD C&I EPCMonitor^© 2026 provides additional insights into supplier performance from a downstream market perspective. Across categories such as portfolio depth, portfolio width, and Net Promoter Score (NPS), several brands consistently emerged as leading performers among surveyed EPCs. Notable examples include Longi Solar and Aiko, in the module segment Huawei and Sungrow, in the inverter segment, and BYD, SolaX Power in the storage segment.

These findings are further reinforced by results from the new EUPD PV & EES InstallerMonitor^© 2026, where many of the same brands also achieved strong evaluations among installers active in the residential and small commercial markets. The consistency of these results across both EPCs and installers highlights the importance of downstream recommendation and market acceptance in shaping supplier success across Europe.

As project requirements become increasingly sophisticated and procurement decisions extend beyond technical specifications alone, downstream recommendation represents only one dimension of supplier performance. Manufacturers must also consider how they are perceived across broader factors such as innovation capability, ESG transparency, and long-term financial resilience, all of which increasingly influence investment decisions within the European C&I market.

Trust, Performance, and Long Term Resilience Define Market Leadership

The EUPD Research’s Brand Trust & Performance Rating^© (BTPR) evaluates manufacturers through a holistic framework that extends beyond market share or product specifications alone. As Europe’s solar and storage market becomes increasingly selective, suppliers are evaluated across multiple dimensions that influence purchasing decisions, project bankability, and long-term market positioning.

The BTPR framework evaluates manufacturers across three core pillars:

• Prosumer, Installer & EPC Trust: Measuring downstream recommendation, satisfaction, market acceptance, and overall confidence among prosumers, installers and EPCs.
• ESG Transparency & Innovation: Assessing sustainability commitment, innovation capability, technology leadership, and transparency practices.
• Price Performance & Financial Stability: Evaluating value proposition, financial resilience, long term bankability, and the ability to support customers throughout the lifecycle of their investments.

The latest BTPR H1 2026 evaluation shows strong alignment between downstream market perception and broader brand performance. Several of the brands that achieved leading positions in the EPCMonitor and InstallerMonitor analyses, also achieved an AA+ Rating in the latest BTPR assessment, demonstrating strong performance across all three pillars; These brands include LONGi Solar, Jinko Solar and Trina Solar in the PV module manufacturer category, GoodWe, Solis (Ginlong) and Sungrow in the inverter manufacturer category, SolaX Power, Pylontech and Sigenergy in the storage manufacturer category.

As Europe’s market continues to evolve toward storage driven economics, integrated energy solutions, and increasingly sophisticated procurement processes, manufacturers must understand not only how their products perform, but also how their brands are perceived across the factors that increasingly influence purchasing decisions. The ability to build trust, demonstrate innovation, and maintain long term business resilience is becoming an increasingly important differentiator for companies seeking to strengthen their position in Europe’s evolving solar and storage market.

Conclusion: Success in Europe Requires More Than Price Competition

Europe’s solar and storage market continues to present significant opportunities, particularly within the C&I segment where storage deployment, flexibility solutions, and intelligent energy management are becoming increasingly important. At the same time, findings from our recent Business Climate Survey indicate that the downstream market remains well positioned to support further growth, with installers and EPCs maintaining both confidence in future demand and available execution capacity.

As the market evolves, commercial energy systems are increasingly being designed around integrated solutions that combine solar, storage, EMS, EV charging, and broader revenue stacking opportunities. This shift is changing not only how projects are developed, but also how technologies and suppliers are evaluated. Success is becoming less dependent on individual products and increasingly linked to the ability to support long term value creation, operational performance, and energy optimisation.

For manufacturers, this means that competitive positioning in Europe extends beyond price competitions alone. Trust among installers and EPCs, demonstrated innovation and ESG transparency, and long-term financial resilience are becoming increasingly important factors influencing purchasing decisions and market acceptance. As Europe’s solar and storage market becomes more sophisticated and selective, companies that align with these expectations will be best positioned to capture the next phase of commercial and industrial growth.

Authors: Daniel Fuchs and Ali Arfa

Daniel Fuchs is the Chief Customer Officer of EUPD Group. He has extensive international experience in sales, marketing, customer engagement, and strategic event management within the renewable energy and cleantech industries. His work focuses on building customer-centric growth strategies, strengthening global partnerships, and supporting market development across the solar, energy storage, and sustainability sectors. He can be reached at[email protected].

Ali Arfa is the Head of Data Management at EUPD Research. He is a graduate of the University of Bonn and with a background in European and North American politics. His expertise encompasses market research, policy development, and stakeholder analysis. His particular focus is on solar energy, energy storage, and strategic consultation. He can be reached at [email protected].