Teresa Casacchia, Head of Storage EMEA and APAC, BayWa r.e.
Hybrid renewable-plus-storage projects are becoming a key part of Europe’s energy transition. By combining renewable generation with Battery Energy Storage Systems (BESS), these assets don’t just generate green power, they also make it much more flexible, controllable and valuable.
Why does this matter? Because Europe’s electricity system is shifting at a fundamental level. Last year, wind and solar accounted for 30% of EU electricity generation, overtaking fossil fuels for the first time. This milestone underlines how central variable renewables have become to the power mix.
Now, as their share grows, the system needs more flexible capacity that can manage fluctuating renewable output. Developers and investors also need ways to protect asset value against changing market signals, grid constraints and regulatory requirements.
Hybridisation is key for this. It is a strategic evolution of renewable assets, which is why we need to rethink how they are designed, operated and monetised so they can continue to drive forward the energy transition.
Flexibility, dispatchability and system value
The primary benefit of hybrid assets is to make power systems much more flexible. Solar and wind generation are variable by nature but pairing them with storage can create more controllable and dispatchable output. This helps reduce curtailment by capturing excess generation when output is high and releasing it when the system needs it.
Hybrid assets are being evaluated as flexible infrastructure serving multiple system and market needs. They are no longer judged solely on how much renewable energy they produce, but how effectively this energy can be integrated into the system.
Grid requirements are shaping design
As a result, grid conditions now play a greater role in how hybrid projects are developed and operated. Grid congestion costs in Europe reached €5.2bn in 2022 and could rise as high as €26bn by 2030. This has prompted developers to design projects around grid availability, export limitations and network requirements from the outset.
This is also changing how hybrid assets are configured. Flexible connection agreements, export limitations, grid-forming capabilities and evolving network codes now influence everything from battery size and duration to control systems, charging strategy and revenue modelling.
From technical design to commercial optimisation
These system benefits are also changing how hybrid projects are planned. As storage becomes central to managing grid constraints, as well as curtailment risk and flexibility opportunities, decisions around BESS sizing and operation are becoming increasingly commercial.
This means analysing energy spreads, cycling strategies, ancillary services opportunities, degradation assumptions, offtake structures and site-specific grid constraints together. This is important because a larger battery is not automatically better. The right size and operating approach depend on the revenue model, risk appetite and long-term objectives of the asset owner.
A market learning curve
Hybridisation is advancing alongside a wider market learning curve. PV- or wind-plus-BESS solutions and emerging hybrid PPAs are gaining traction across Europe, but they remain innovative structures. Banks and investors are gaining confidence around revenue stability, risk allocation and long-term cashflow predictability.
That is not unusual for an emerging asset class. However, progress needs to be rapid, as Europe needs a more flexible electricity system, and renewable assets need to adapt to that reality. As more projects are developed, financed and operated successfully, confidence should continue to grow – which is why we need to ensure market frameworks mature quickly enough to support deployment at scale.
Hybridisation as a strategic evolution
One of the strongest arguments for hybrid renewable-plus-storage projects is their ability to future-proof renewable portfolios. Even where the business case is not yet fully established, integrating storage considerations early in project development preserves optionality and enables assets to adapt when the time comes.
For investors and asset owners, this can help protect long-term value. As power price volatility increases and curtailment risks grow in some markets, the ability to shift output, manage exposure and respond to system needs has become even more valuable.
Hybridisation is becoming a strategic evolution of renewable infrastructure, and one that will play an increasingly important role in shaping Europe’s energy future – if we pave the way for it now.
This article appeared in the September 2026 issue of Energy Manager magazine. Subscribe here.
