As Serbia navigates its energy transition, the focus remains heavily on megawatt (MW) capacity rather than the actual terawatt-hours (TWh) of usable energy produced. This approach poses significant challenges, particularly for exporters subject to the EU’s Carbon Border Adjustment Mechanism (CBAM). The distinction between installed capacity and deliverable energy is crucial for understanding competitiveness in the European market, where actual energy delivery under real conditions is paramount.
The reliance on MW as a metric often obscures the operational realities of energy production. For instance, a 1,000 MW solar installation in Serbia, with a capacity factor of 17-19%, yields approximately 1.5 to 1.7 TWh annually. In contrast, a 600 MW wind portfolio can achieve similar or even superior output due to its higher capacity factor of 32-38%. This discrepancy illustrates that while solar may appear more substantial in terms of installed capacity, it does not necessarily translate into reliable energy supply for industrial needs.
Timing and shape of energy delivery are critical factors that MW metrics fail to capture. Solar energy typically peaks during midday hours, while wind generation can provide a more consistent output across various times and seasons. For industries reliant on continuous power supply—such as aluminium processing and steel manufacturing—having energy available when needed is far more valuable than simply having high capacity figures. Thus, procurement teams are increasingly focused on how many usable megawatt-hours can be delivered in alignment with their operational load profiles.
Curtailment further complicates the picture. In congested systems, installed capacity does not equate to delivered energy. For example, a solar portfolio generating 1.6 TWh but facing an 8% curtailment would only provide around 1.47 TWh of eligible green electricity. This shortfall translates into significant financial losses and compliance challenges for industries relying on this energy for CBAM compliance, potentially costing millions annually.
The reality of grid dynamics also plays a role. Transmission systems do not uniformly absorb capacity; they manage energy flows over time. A cluster of projects totaling 500 MW connected to a single node may lead to curtailments during peak demand periods, regardless of overall system capacity. Consequently, what matters most to industrial buyers is whether contracted green electricity is reliably delivered, highlighting the importance of TWh accounting.
Public targets framed solely in MW do not adequately reflect the potential for usable green supply. Two countries with identical MW goals may achieve vastly different outcomes based on their respective capacity factors and curtailment rates. This lack of clarity can foster a misleading sense of progress within Serbia’s energy discourse.
Investors must also be wary of the risks associated with an excessive focus on MW metrics. The internal rate of return (IRR) for projects hinges on actual delivered MWh multiplied by market prices minus costs. Projects that appear cost-effective based on installed capacity but suffer from high curtailment or low capture prices ultimately yield lower economic returns and increase risk for industrial buyers.
The dominance of solar in current MW pipelines may skew technology choices. While solar is easier to scale in terms of capacity, wind technology often delivers higher usable energy per installed MW due to its better performance characteristics. Under CBAM regulations, this bias towards solar could prove costly as wind offers greater compliance-relevant energy with less system stress.
Storage solutions are frequently touted as a remedy for aligning MW with TWh delivery. However, storage merely shifts energy across time rather than creating additional power. When integrated into portfolios designed primarily around MW metrics, storage may only serve to mask underlying inefficiencies rather than enhance overall deliverability.
Aggregators and industrial buyers are increasingly prioritizing TWh over MW when evaluating portfolios. They seek annual volumes and reliability rather than just headline capacity figures. The CBAM framework reinforces this shift by tying emissions accounting directly to actual delivered energy rather than theoretical capacity.
Furthermore, while installing MW can occur rapidly, achieving reliable TWh delivery often takes longer due to grid constraints and commissioning delays. Early operational years are critical for exporters under CBAM as they establish procurement decisions that will influence future supplier rankings.
The ongoing emphasis on MW could lead Serbia to overestimate its readiness for decarbonization while underestimating compliance gaps faced by exporters. This misalignment risks creating rushed solutions that ultimately result in increased costs when EU buyers demand verifiable results.
A strategic recalibration is necessary for Serbia’s energy transition to succeed. The focus should shift towards quantifying how many terawatt-hours can be reliably supplied to industry while considering factors such as curtailment and grid readiness. Evaluating technology choices based on TWh deliverability will better serve both investors and industrial consumers in navigating the complexities introduced by CBAM.
This shift in perspective will alter procurement behaviors significantly; instead of seeking the lowest-priced MW contracts, buyers will prioritize portfolios that guarantee annual volumes with defined reliability metrics. As Serbia continues its transition towards renewable energy sources, the emphasis must remain firmly on delivering credible terawatt-hours that meet market demands effectively.
