The Baltics are yet again in the deserving spotlight, as the Estonian capital Tallinn is currently hosting key energy leaders at the ‘Baltic Nordic Energy Summit’. Looking back a mere nine months to February 2025, you surely remember the high-stakes, carefully planned maneuver in which the Baltic region simultaneously secured its geopolitical energy independence and, in doing so, created one of the most compelling clean energy investment opportunities in Europe. Read on to learn why, for savvy investors, this new market is the go-to for a battery "gold rush."
In February 2025, Lithuania, Latvia, and Estonia achieved a decades-long strategic goal: they disconnected from the Russian-controlled BRELL power grid and successfully synchronized with the Continental European Synchronous Area (CESA). This €1.6 billion geopolitical pivot brought about energy sovereignty, but setting it up was also quite a technical challenge.
By leaving BRELL, the Baltic states were, for the first time, solely responsible for their own grid stability and frequency. This transformation was catalysed by a single, non-negotiable deadline, which forced the creation of an entirely new market launched at an unheard-of speed: the Baltic Balancing Capacity Market (BBCM).
The "Green Engine" unlocked billions in storage
The BBCM is far more than a technical fix. It was designed as the "green engine" that would turn grid stability from a burdensome cost center into a commercial opportunity.
Instead of relying on old state-run reserve models, the BBCM is a unified, cross-border auction in which the three Baltic TSOs (Litgrid, AST, and Elering) procure grid stability services - like Frequency Containment Reserve (FCR) and automatic Frequency Restoration Reserve (aFRR) - from the cheapest, most capable provider.
This new market provides precise, predictable, and, at present, highly lucrative revenue streams for flexible assets. The market signal is so potent that Litgrid CEO Rokas Masiulis stated developers are actively bypassing government subsidies to invest because "the market is hot NOW".
This mechanism serves as the lynchpin for the region’s green ambitions, enabling including all three countries’ goals of achieving 100% renewable electricity by 2030. This is because it also eliminates the duck curve by creating a powerful financial incentive for Battery Energy Storage Systems (BESS) to charge when renewables are abundant (and prices are low) and discharge to provide high-value stability services when the grid needs them.
The market’s response has been immediate and explosive. A 1 MW / 2 MWh fully merchant BESS is already operating in Alytus, Lithuania. Enery’s 9 MW / 18 MWh Rummu project in Estonia came online in April 2025. These pioneers are being followed by a wave of large-scale projects, including the 200 MW / 400 MWh Hertz 1 & 2 projects in Estonia, Latvenergo’s 250 MW / 500 MWh plan in Latvia, and Ignitis's 110 MW expansion at the Kruonis plant in Lithuania.
This activity is all driving toward a regional target of 1,600 MW of flexibility storage by 2030. With Lithuania alone having already reserved capacity for 3,500 MW of BESS projects, and several GWh in the pipeline across the region, it looks like the target is well within reach.
This market is not for the faint-hearted
While the opportunity is undeniable, securing capital in this nascent market is exceptionally challenging. The very factors creating the "gold rush" are also what make traditional lenders nervous.
The market is young and just opening up. This newness is why ancillary service prices are currently through the roof, offering potential 20-30% IRRs for first-movers. But for a bank, this volatility is a risk, not an opportunity. It is incredibly difficult to build a 15-year ROI model on unpredictable merchant revenue streams.
Furthermore, the Baltic states are, in global terms, relatively small markets. The major international consultants who write the bankable reports that lenders rely on are focused on larger markets like Germany and the UK, creating an information vacuum. As the developers of the Rummu project noted, financing their BESS was a pioneering initiative that served as a learning and teaching experience for their local banks - a process not all developers have the time or resources for.
This leads to a funding gap: large, state-backed or TSO-led projects are getting financed, but smaller, independent developers are challenged to get projects over the line. Even in a "hot" market, Lithuania’s state capex support scheme was oversubscribed by 2x, proving that developers are scrambling for any form of de-risking they can find.
Beyond finance, the grid itself is a barrier. It requires further investment to handle the simultaneous explosion of renewables (a 403% increase since 2022; source: Aurora Energy Research) and the massive BESS pipeline.
The 3-point playbook to win the Baltic battery race
So, how are savvy investors and developers actually able to capture the outsized returns? Success depends on a 3-point strategy:
1. The first-mover window is closing
The “crazy prices” and 20-30% IRRs are a first-mover phenomenon, meaning this high-priced window will eventually close. According to Aurora Energy Research, with the Baltic ancillary markets small and the market requiring only 36 MW of FCR, 90-120 MW of aFRR, and 600-770 MW up/370-610 MW down of mFRR, this "gold rush" opportunity will be rapidly saturated. As seen in mature markets like the UK, ancillary prices have declined as competition has increased. Although the current extreme price volatility in ancillary services (particularly in PICASSO) should provide significant opportunities for the next decade, the truly massive ancillary returns are most likely to be seen by projects that go live in the next 24-36 months.
2. Revenue stacking
Acting fast gets you in the door; revenue stacking is what ensures long-term bankability. A business model based only on ancillary services will fail once the market saturates. A durable, bankable asset must be able to stack multiple revenue streams. The winning model combines high-value ancillary revenues in the early years with a long-term strategy built on energy arbitrage (trading in the day-ahead and intraday markets). This requires not a dumb battery, but a smart asset managed by sophisticated AI-powered optimization platforms.
3. Aggregation via Virtual Power Plants (VPPs)
For the smaller projects (and even large solar parks) struggling with funding, aggregation is the answer. The BBCM has a 1 MW minimum bid threshold, structurally locking out small assets. A Virtual Power Plant (VPP) solves this by bundling distributed assets together. It provides the smart optimization layer needed for revenue stacking and, crucially, presents a single, sophisticated, and bankable entity to lenders. This is not theory: Eesti Energia is already using a VPP to prequalify a solar park for aFRR and mFRR services.
So for those attending the Tallinn Summit, the message is clear.
The Baltic market, born from a historic geopolitical pivot, is currently the most exciting BESS story in Europe. But it is also a strategic race. The winners will not be those who just show up, but those who act fast to capture a fleeting opportunity, stack revenues for long-term resilience, and aggregate assets to unlock sustainable scale.
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