MEMO Analysis Links Solar Output to Lower Day-Ahead Power Prices in North Macedonia
Electricity generation from solar power plants tends to push prices down on the power exchange, while reduced solar output is associated with price increases, according to an analysis by Ana Angelova, a market operations specialist at the National Electricity Market Operator (MEMO).
The analysis aimed to identify seasonal trends and highlight the relationship between photovoltaic (PV) generation, electricity consumption, traded volumes, and day-ahead prices on the North Macedonian power exchange. MEMO noted that the day-ahead market operates in an isolated mode.
Angelova used official power exchange data for 2024, focusing on hours when PV plant efficiency exceeded 30%.
Consumption remains broadly stable across the year
The findings point to a clear seasonal pattern. Electricity consumption stays relatively steady throughout the year, with only minor declines during spring and summer. PV generation, however, shows a pronounced seasonal swing—peaking in summer and reaching its lowest levels in winter.
Angelova also stressed that higher PV output coincides with increased traded volumes on the day-ahead market.
Prices bottom out in April, rise toward winter
According to the analysis, day-ahead prices are lowest in April, a period linked to milder weather, lower demand, and stronger solar production. From summer onward—and particularly during winter—prices trend higher, peaking in November.
The November price peak aligns with a combination of weak PV generation and higher consumption.
“Increased electricity generation from photovoltaic plants is associated with lower prices, while low generation leads to higher market prices, emphasizing the impact of renewable energy availability on price formation. The trend indicates that energy policies should focus on addressing weaknesses during the winter period and harnessing the potential of solar energy in summer,” Angelova wrote.
Proposed measures to strengthen renewables integration

Photo: MEMO
Angelova outlined several options to improve the integration of renewables—especially solar—into the power system. The proposed mechanisms include:
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Flexible market mechanisms: introduction of a 15-minute trading interval, creation of an intraday market, dynamic tariffs, and guarantees of origin.
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Energy storage technologies: battery energy storage systems (BESS) and pumped-storage hydropower plants.
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Alignment with the European energy framework: adoption of ENTSO-E grid codes, coupling with the single European electricity market, deployment of smart meters, and use of financial instruments such as contracts for difference (CfD) and power purchase agreements (PPA).













