Solar Power Surges, Driving Down Daytime Electricity Prices in Finland and Estonia

The electricity market in Finland and Estonia is experiencing a notable shift, with daytime electricity prices frequently falling below nighttime rates, a trend largely attributed to the surge in solar power generation. This inversion of the traditional price structure, where night-time electricity was historically cheaper, has become increasingly common since last spring.

Juho Kinni, head of Helen's portfolio management team, confirmed that this is an international phenomenon, driven by the substantial number of solar panels installed across homes in the region. As solar energy production peaks during daylight hours, it floods the market, leading to a significant decrease in wholesale electricity prices.

Despite the lower daytime prices, consumers who have installed solar panels on their homes are encouraged to prioritize using the electricity they generate themselves. This strategy allows them to benefit directly from savings on transmission fees and taxes, which are applied to electricity drawn from the grid.

The trend highlights the growing impact of renewable energy sources on market dynamics. While the increased solar capacity offers environmental benefits and drives down prices during peak production, it also presents new challenges and opportunities for grid management and consumer behavior.

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As long as electricity has been traded on the stock exchange, electricity has generally cost less at night than during the day. But not anymore. Since last spring, electricity has very often been cheaper during the day than at night, even though much more electricity is used during the day than during the night hours.