Greece has completed another major stage of its transition from lignite to renewable electricity, but the success of its solar build-out is creating a new financial challenge. Generation capacity is rising faster than the system’s ability to absorb low-cost midday electricity, weakening solar capture prices and increasing curtailment risk.
RWE and PPC have completed nine photovoltaic plants with combined capacity of 930 MWp, or approximately 884 MWac, on the site of the former Amynteo lignite mine in Western Macedonia. The projects were delivered through Meton Energy, owned 51% by RWE and 49% by PPC, and are expected to produce electricity equivalent to the annual consumption of more than 400,000 households.
The partners are constructing a further 567 MW at the Kotyli and Neo Syrakio projects, scheduled for commissioning in 2027. PPC’s wider strategy targets 19 GW of renewable capacity by 2030, backed by an investment programme of approximately €24 billion covering renewables, storage, flexible generation and digital infrastructure.
Greece added more than 2.2 GW of solar during 2025, lifting cumulative capacity from 8.82 GW to 11.5 GW. That expansion has strengthened energy independence but reduced the market value of additional daytime generation. Greece’s reported solar value of €43/MWh was below Croatia’s €69/MWh, Slovenia’s €60/MWh, Romania’s €58/MWh and Bulgaria’s €57/MWh.
Storage economics are moving in the opposite direction. Greece’s indicative battery value reached €798/MW, almost the highest in Europe. This combination—low solar capture prices and high storage spreads—provides a strong argument for restructuring the next generation of Greek projects around hybrid configurations rather than adding unprotected photovoltaic output.
The capital requirement is substantial. Retrofitting hundreds of megawatts of solar with two-hour storage could require several hundred million euros, depending on connection scope and battery duration. Financing will require clarity over grid access, dispatch rights, curtailment compensation and the ability to combine wholesale arbitrage with ancillary-service revenue.
PPC and RWE have an advantage because their portfolios are large enough to diversify production and internalise energy-management capabilities. Smaller independent producers face greater exposure to negative prices, imbalance costs and merchant-revenue volatility. Their route to bankability increasingly depends on corporate PPAs containing floor prices, storage integration or revenue-sharing arrangements with traders.
The Amynteo redevelopment remains a successful industrial-transition project, replacing lignite production with nearly 1 GW of solar generation. Its next stage will be judged by the ability of storage, transmission and market reform to preserve the value of that electricity after it enters an increasingly congested system.
