The renewable energy landscape in Southeastern Europe is undergoing a transformation with green hydrogen production via electrolysis becoming a key driver. The surge in green hydrogen demand from electrolysis is projected to significantly boost the region's electricity demand, particularly benefiting solar PV systems. Countries such as Greece and Romania have set ambitious targets for hydrogen integration, with Greece anticipating a substantial power demand for electrolysis and hydrogen consumption by 2050. The integration of hydrogen electrolysis is expected to stabilize electricity prices, support solar PV operators, and prevent curtailment of excess energy generation. This symbiotic relationship between green hydrogen production and solar PV promises a more resilient and sustainable energy future for the region. As Southeastern Europe continues to invest in renewable energy technologies, green hydrogen's pivotal role in driving the energy transition and ensuring a stable market for solar PV becomes increasingly evident.