Nordic Electricity Market Analysis: March 29, 2026

Drafted by Gemini 2.5 Flash and reviewed by Claude Sonnet 4. Sourced from NordPool, SMHI, SvD Näringsliv, DN Ekonomi, SVT Ekonomi, and Second Opinion. Please note: This information is AI-generated and provided as-is without warranty. Readers should independently verify all data before making decisions.

Executive Summary

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The Swedish electricity market in SE3 on March 29, 2026, saw an average day-ahead spot price of 376.52 SEK/MWh, significantly higher than yesterday but positioned in the mid-range of a highly volatile week. Prices experienced a notable midday dip to 39.17 SEK/MWh, supported by clear weather, contrasting with extremely high prices earlier in the week. Price spreads across bidding areas remained substantial, with SE4 reaching an extreme maximum of 1329.06 SEK/MWh, indicative of persistent transmission limitations. The mFRR Energy Activation Market (EAM) showed a strong and consistent need for upward regulation, with today’s imbalance of 79.0 EUR/MW falling within a recently volatile range. Several unplanned outages, including a local one at Igelsta kraftvärmeverk in SE3, contributed to supply concerns and market tightness.

Day-Ahead Spot Prices

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Commentary Today’s average day-ahead spot price in SE3 settled at 376.52 SEK/MWh, marking an increase of 15.54% from yesterday’s average of 325.88 SEK/MWh. This price point sits in the middle of a highly volatile week, which saw an exceptionally low average of 160.4 SEK/MWh on Wednesday, March 25, and an extremely high average of 605.6 SEK/MWh on Friday, March 27, with a peak of 1548.8 SEK/MWh on that day. The market exhibited significant intraday volatility today. Prices started high in the early morning, reaching 564.43 SEK/MWh at 00:00 CET, and then experienced a sharp decline during the solar peak hours, hitting a daily low of 39.17 SEK/MWh at 14:00 CET. It is noted that hourly price data for 02:00 CET was not available in the provided context. This midday trough was followed by a recovery in the evening, with prices peaking at 553.72 SEK/MWh at 19:00 CET. The off-peak average of 473.21 SEK/MWh was notably higher than the peak average of 334.22 SEK/MWh, a reversal from yesterday’s trend where off-peak was lower (296.61 SEK/MWh vs 340.51 SEK/MWh peak). This suggests stronger demand or tighter supply during the night and early morning hours compared to the previous day, while the midday dip indicates ample generation, likely from renewables.

Price Spread Across Bidding Areas

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Commentary Significant price differences persisted across the Swedish bidding areas today. SE4 recorded the highest average spot price at 628.12 SEK/MWh, more than 1.6 times higher than SE3’s average of 376.52 SEK/MWh. SE1 and SE2 continued to show considerably lower average prices at 173.13 SEK/MWh and 138.38 SEK/MWh, respectively. This substantial north-south price spread highlights ongoing transmission constraints within Sweden, limiting the flow of cheaper, often hydro-based, generation from the northern areas (SE1, SE2) to the more demand-heavy southern areas (SE3, SE4). The maximum price in SE4 reached an extreme 1329.06 SEK/MWh, indicating severe tightness during certain hours, likely due to a combination of high demand and limited import capacity into the region. This extreme peak in SE4 is a recurring pattern when transmission capacities are strained, leading to isolated price spikes.

News & Geopolitical Context

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Today’s news highlights a mix of general interest and critical market announcements. Geopolitical tensions continue to be a significant factor, with reports of “Explosioner i Iran och Israel – hot mot krigsfartyg” (Explosions in Iran and Israel – threat to warships) published at 00:53 CET, and “Fredssamtal om Iran i dag – utan stridande parter” (Peace talks on Iran today – without warring parties) at 08:29 CET. These events, alongside the identification of the “f\u00f6rsta roboten fr\u00e5n Jemen” (first missile from Yemen) by Israel at 01:26 CET yesterday, underscore the ongoing instability in the Middle East, which can introduce volatility and risk premiums into global energy markets, including electricity. The “Dr\u00f6nare har st\u00f6rtat i Finland: \u201dSt\u00f6rsta allvar\u201d” (Drones have crashed in Finland: “Utmost seriousness”) at 13:25 CET also adds to regional security concerns, which, while not directly impacting supply, contributes to a general climate of uncertainty.

Several market announcements (UMMs) were published today and yesterday, indicating various planned and unplanned outages. Of particular note for SE3 is the “Unplanned, Unavailability of electricity facilities: Production, SE3, Igelsta kraftvärmeverk” reported at 09:24 CET. This local failure in a combined heat and power plant directly impacts local generation capacity in SE3, potentially contributing to higher prices in the area.

Other significant UMMs include multiple planned and unplanned production outages for FLEMALLE TH1 in Belgium and ROTTERDAM 1 in the Netherlands, reported throughout the day. While not directly in the Nordics, these outages in interconnected European markets can influence overall supply-demand balances and cross-border trade, indirectly affecting Nordic prices. Planned transmission unavailability between Poland and Lithuania (PL <-> LT) and Lithuania and Latvia (LT <-> LV), as well as Estonia and Latvia (EE <-> LV), were also announced. These transmission limitations could restrict cross-border capacity, potentially exacerbating price differences between regions and limiting import/export flexibility.

General news items, such as the switch to daylight saving time (“Tidsomställningen delar läsarna: \u201dRena tortyren\u201d” at 13:35 CET), changes in mortgage rules (“Nya bolåneregler \u2013 detta ska du ha koll på” at 08:51 CET), and discussions on labor immigration ("\u201dFel när staten ska styra rekrytering\u201d" at 10:00 CET), are not directly energy-market relevant but reflect broader economic and societal trends that can indirectly affect energy demand and policy over time.

Ancillary Services

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FCR-N

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Today’s FCR-N data is not available in the provided context, indicated by an empty object {}. Commentary Based on the 7-day ancillary history, the average FCR-N price has fluctuated, ranging from a low of 14.9 EUR/MW on March 26 and 27 to a high of 30.5 EUR/MW on March 23. Yesterday, March 28, the average FCR-N price was 15.9 EUR/MW. This indicates a relatively stable but competitive market for frequency containment reserve normal, with prices generally lower towards the end of the week.

FCR-D

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Today’s FCR-D data is not available in the provided context, indicated by an empty object {}. Commentary Analyzing the 7-day ancillary history, FCR-D Up regulation average prices have been relatively low, ranging from 1.8 EUR/MW (March 26, 28) to 5.1 EUR/MW (March 24). FCR-D Down regulation average prices have shown more variability, from 1.3 EUR/MW (March 28) to 9.9 EUR/MW (March 24). Yesterday’s averages were 1.8 EUR/MW for FCR-D Up and 1.3 EUR/MW for FCR-D Down, suggesting less demand for downward regulation.

mFRR CM

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Today’s mFRR CM data is not available in the provided context, indicated by an empty object {}. Commentary Without specific mFRR CM data for today, we refer to the 7-day ancillary history for trends. The market for manual Frequency Restoration Reserve (mFRR) has seen varying needs for up and down regulation. Up regulation hours have been consistently high, ranging from 5 to 19 hours daily over the past week. Down regulation hours have varied from 5 to 19. The average mFRR imbalance has been highly volatile, ranging from 15.1 EUR/MW on March 25 to 115.5 EUR/MW on March 26. Yesterday, March 28, saw 15 hours of up regulation and 9 hours of down regulation, with an average imbalance of 59.2 EUR/MW, indicating a net need for upward regulation.

mFRR EAM

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Commentary The mFRR Energy Activation Market (EAM) for today, March 29, 2026, showed a strong prevalence of upward regulation, particularly during the night and morning hours (00:00 to 11:00 CET). A total of 1722.0 MW of upward regulation was activated, significantly outweighing the 53.0 MW of downward regulation. The system required upward regulation for 11 hours, compared to only 3 hours of downward regulation, with the hourly profile provided only up to 14:00 CET. The average imbalance price was 79.0 EUR/MWh, with a maximum of 200.0 EUR/MWh, highlighting periods of acute system imbalance. This average imbalance of 79.0 EUR/MW falls within the highly volatile range observed over the past seven days, which saw averages from 15.1 EUR/MW to 115.5 EUR/MW. The average spread between imbalance prices and day-ahead prices was 43.01 EUR, with a substantial average upward spread of 55.68 EUR and a maximum upward spread of 119.7 EUR at 03:00 CET. Conversely, downward regulation hours showed an average spread of -3.44 EUR, with a maximum downward spread of -7.31 EUR at 12:00 CET. The consistent high number of up regulation hours throughout the week (ranging from 5 to 19 daily) indicates an ongoing structural need for additional generation to balance the system, offering lucrative opportunities for assets capable of providing upward regulation.

Weather Conditions

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Commentary Today’s weather across SE3 cities shows mild conditions with average temperatures around 4.8°C. Wind speeds are moderate, averaging 3.8 m/s, and cloud cover is relatively low at 5.3%. Precipitation is minimal, with an area average of only 0.4 mm, primarily in Göteborg. Comparing this to the 7-day weather history, today’s average temperature of 4.8°C is consistent with the past week’s average of 5.0°C. However, today’s average wind speed of 3.8 m/s is slightly lower than the 7-day average of 4.4 m/s, suggesting a slight reduction in potential wind power generation. The most significant change is the minimal precipitation today (0.4 mm average) compared to the past week, which saw substantial rainfall, including 150.1 mm on March 25 and 32.5 mm yesterday. This clear weather pattern, with low cloud cover and minimal precipitation, likely supported strong solar generation during midday hours, contributing to the sharp drop in day-ahead spot prices observed between 11:00 CET and 16:00 CET.

Grid & Market Events

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• 29.03.2026 14:04 CET - Unplanned Production Unavailability (BE, FLEMALLE TH1): A failure at a Belgian production facility.
• 29.03.2026 14:04 CET - Planned Production Unavailability (BE, FLEMALLE TH1): Foreseen maintenance/test at the same Belgian facility.
• 29.03.2026 14:04 CET - Unplanned Production Unavailability (BE, FLEMALLE TH1): Another failure at the Belgian production facility.
• 29.03.2026 10:44 CET - Unplanned Production Unavailability (NL, ROTTERDAM 1): A failure at a Dutch production facility.
• 29.03.2026 10:44 CET - Planned Production Unavailability (NL, ROTTERDAM 1): Foreseen maintenance/test at the same Dutch facility.
• 29.03.2026 09:42 CET - Planned Transmission Unavailability (PL <-> LT): Foreseen maintenance impacting trading capacity between Poland and Lithuania.
• 29.03.2026 09:42 CET - Planned Transmission Unavailability (PL <-> LT): Another planned maintenance impacting capacity between Poland and Lithuania.
• 29.03.2026 09:40 CET - Planned Transmission Unavailability (LT <-> LV): Foreseen maintenance impacting capacity between Lithuania and Latvia.
• 29.03.2026 09:38 CET - Planned Transmission Unavailability (LT <-> LV): Another planned maintenance impacting trading capacity between Lithuania and Latvia.
• 29.03.2026 09:24 CET - Unplanned Production Unavailability (SE3, Igelsta kraftvärmeverk): A failure at a production facility within the SE3 bidding area.
• 29.03.2026 07:30 CET - Planned Transmission Unavailability (EE <-> LV): Foreseen maintenance impacting trading capacity between Estonia and Latvia.
• 28.03.2026 23:28 CET - Unplanned Production Unavailability (BE, FLEMALLE TH1): A failure at a Belgian production facility, active since yesterday.
• 28.03.2026 23:27 CET - Planned Production Unavailability (BE, FLEMALLE TH1): Foreseen maintenance/test at the same Belgian facility, active since yesterday.
• 28.03.2026 21:23 CET - Unplanned Production Unavailability (NL, ROTTERDAM 1): A failure at a Dutch production facility, active since yesterday.
• 28.03.2026 21:00 CET - Unplanned Production Unavailability (NO2, Brokke): A failure at a Norwegian hydropower plant.
• 28.03.2026 17:24 CET - Unplanned Production Unavailability (SE1, Ligga - G3): A failure at a hydropower plant in northern Sweden.
• 28.03.2026 14:01 CET - Unplanned Production Unavailability (NO3, Tafjord 5): A failure at a Norwegian hydropower plant.
• 28.03.2026 14:00 CET - Planned Production Unavailability (NO5, Lang Sima): Foreseen maintenance (tunnel cleaning) at a Norwegian hydropower plant.
• 28.03.2026 12:30 CET - Unplanned Production Unavailability (FI, Metsä Fibre Kemi): Technical issues at a Finnish production facility.

Commentary Today’s grid events are marked by a series of unplanned and planned outages across the Nordic and interconnected European markets. The unplanned unavailability of Igelsta kraftvärmeverk in SE3 at 09:24 CET is particularly relevant, as it directly reduces local generation capacity in the SE3 bidding area. This, combined with the general increase in the average spot price in SE3, suggests that local supply constraints are playing a role.

Beyond Sweden, multiple unplanned and planned outages at FLEMALLE TH1 (Belgium) and ROTTERDAM 1 (Netherlands) production facilities indicate broader European supply issues, which can indirectly affect Nordic markets through cross-border trade. Furthermore, several planned transmission unavailabilities between Poland and Lithuania, Lithuania and Latvia, and Estonia and Latvia suggest reduced import/export capabilities in the Baltic region. These limitations can lead to increased price separation between regions and reduce the flexibility of the wider European grid to balance supply and demand.

The unplanned outages at Norwegian hydropower plants (Brokke in NO2, Tafjord 5 in NO3) and the Finnish Metsä Fibre Kemi facility, alongside the planned maintenance at Lang Sima (NO5), collectively point to a reduction in available generation capacity in the broader Nordic region. While some of these outages were published yesterday, their continued active status contributes to the ongoing market tightness and potential for price volatility. The combination of local and regional supply reductions, coupled with transmission constraints, creates a challenging environment for market participants.

Implications for BESS in SE3

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The market conditions in SE3 on March 29, 2026, present compelling opportunities for Battery Energy Storage System (BESS) operators. The significant intraday price volatility, with a sharp drop to 39.17 SEK/MWh at 14:00 CET and peaks above 550 SEK/MWh in the early morning and evening, creates substantial arbitrage potential. BESS units can profit by charging during the low-price midday hours and discharging during the high-price periods. The substantial difference between the off-peak average (473.21 SEK/MWh) and peak average (334.22 SEK/MWh), with higher off-peak prices today, indicates a shift in demand patterns that BESS operators can exploit by strategically charging during lower-priced periods (even if those are traditionally peak hours) and discharging during higher-priced off-peak hours.

Furthermore, the mFRR EAM market demonstrated a strong and consistent need for upward regulation, with an average upward spread of 55.68 EUR against day-ahead prices and a maximum spread of 119.7 EUR. This indicates that BESS operators capable of providing fast-response upward regulation can capture significant revenues from this ancillary service market. The sustained need for upward regulation for 11 hours, and the consistent high demand for up regulation seen over the past week, suggests a persistent system imbalance that BESS can help address. The local unplanned outage at Igelsta kraftvärmeverk in SE3 further emphasizes the value of flexible local resources like BESS to support grid stability and provide rapid response to unexpected supply disruptions. Operators should prioritize participation in the mFRR EAM market, leveraging their ability to quickly inject power to capitalize on these high spreads.

Outlook

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The outlook for the Swedish electricity market, particularly in SE3, suggests continued price volatility influenced by a combination of regional supply constraints and ongoing geopolitical uncertainties. While mild weather conditions and clear skies may support solar generation during the day, the slightly lower wind speeds compared to the 7-day average could reduce wind power output. The series of unplanned outages in Sweden and neighboring countries, coupled with planned transmission limitations, will likely keep spot prices elevated and volatile. The strong and consistent need for upward regulation in the mFRR EAM market is expected to persist as the system seeks to balance supply and demand. BESS operators should remain agile, focusing on intraday arbitrage and active participation in ancillary service markets, especially mFRR, to capitalize on these dynamic market conditions. The geopolitical landscape, particularly in the Middle East, adds an unpredictable layer of risk, which could further impact energy prices.