The economics behind Hungary's newest grid-scale storage assets are now public, and they show a grant programme acting as a catalyst rather than a financier. SMEGSolar's two-site project was launched with support won in 2024 from the European Union's Recovery and Resilience Fund (RRF), under which the company committed to building a combined 21 MW of power and 84 MWh of capacity.
Where the money went
According to Világgazdaság, the total project cost came to HUF 14,727,521,208, while the contracted support amount was HUF 2,167,997,872 — a support intensity of 14.75 percent. The remainder had to be carried by the developer.
The capacity was split across two very different technologies. At Teresk, an 18 MW / 73.2 MWh lithium-iron-phosphate (LFP) system was built. At Balatonberény, a 3 MW / 10.8 MWh vanadium redox flow battery (VRFB) was commissioned. In other words, roughly 86 percent of the portfolio's megawatt-hours sit in conventional lithium-ion, with the flow battery representing the smaller, higher-duration-facing slice.
A wider but thin funding layer
SMEGSolar's award is not an isolated case. Világgazdaság reported in September on a similar project in Veszprém, where Dynatron Energy Kft. delivered a hybrid plant combining a solar PV unit with a 0.5 MW / 2 MWh battery. That HUF 823.6 million investment used HUF 67.4 million of RRF support — a support intensity of roughly 8 percent. Earlier, Ideona Zrt. established comparable systems in Öskü and Söpte, with STS as main contractor on the Öskü project based on STS designs.
What the numbers signal for policy
Three observations follow from the disclosed figures. First, EU recovery money in Hungary is functioning as a de-risking instrument for first-of-a-kind deployments rather than as a construction subsidy: at 8–15 percent support intensity, developers still carry the overwhelming majority of capital risk. Second, the funding is technology-agnostic in practice, which has allowed a small but real flow battery segment to emerge next to LFP. Third, the binding constraint on projects is not capital but grid access — the Balatonberény scheme only survived because it was relocated and re-scoped around an existing connection.
For LDES watchers, the Hungarian case is a useful benchmark: modest grant intensity can seed non-lithium capacity, but it does not by itself solve interconnection queues or the revenue-stacking problem that determines whether multi-hour assets get built at scale.
This article was assisted by AI analysis. Please refer to the original source for official information.