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#
The Swedish electricity market in SE3 on Sunday, March 22, 2026, experienced a significant decrease in day-ahead spot prices, with the average price falling to 317.04 SEK/MWh. This represents a dramatic drop from the previous day’s 435.61 SEK/MWh and is notably below the 7-day average of 722.2 SEK/MWh, reflecting a wider trend of price volatility. Negative prices were observed during midday, reaching a low of -12.27 SEK/MWh at 13:00 CET, driven by lower weekend demand and ample renewable generation under clear skies. Ancillary service markets showed moderate FCR prices, while mFRR EAM experienced substantial down-regulation, though less stressed than earlier in the week. Geopolitical tensions in the Middle East, particularly concerning the Strait of Hormuz, continue to pose a considerable risk to global energy markets, potentially impacting fuel and insurance prices and thus indirectly the Nordic power sector.
Day-Ahead Spot Prices#
| Metric | Price (SEK/MWh) | Price (EUR/MWh) |
|---|---|---|
| Average | 317.04 | 29.32 |
| Minimum | -12.27 | -1.14 |
| Maximum | 642.35 | 59.41 |
| Peak Average | 278.56 | 25.77 |
| Off-Peak Average | 394.00 | 36.44 |
Commentary Day-ahead spot prices in SE3 for March 22, 2026, exhibited considerable volatility, with an average price of 317.04 SEK/MWh. This represents a notable decrease from the previous day’s average of 435.61 SEK/MWh. More significantly, it marks a dramatic drop from the week’s peak average of 1100.8 SEK/MWh recorded on Friday, March 20, and is well below the 7-day average of 722.2 SEK/MWh. The market experienced negative prices, reaching a minimum of -12.27 SEK/MWh at 13:00 CET, indicating periods of oversupply relative to demand, characteristic of a Sunday with reduced industrial load. Peak prices were observed in the evening, reaching 642.35 SEK/MWh at 19:00 CET, demonstrating the typical evening demand ramp-up. The off-peak average was higher than the peak average, which is unusual but mathematically possible given the deeply negative prices during the midday off-peak hours, skewing the overall off-peak average upwards. The extreme prices earlier in the week, particularly on March 19-20 (919.4 and 1100.8 SEK/MWh respectively), were likely driven by a combination of higher demand, potentially lower renewable output, and grid constraints, a stark contrast to today’s lower price levels.
Price Spread Across Bidding Areas#
| Area | Average (SEK/MWh) | Minimum (SEK/MWh) | Maximum (SEK/MWh) |
|---|---|---|---|
| SE1 | 105.74 | 28.33 | 202.06 |
| SE2 | 88.41 | -12.22 | 258.50 |
| SE3 | 317.04 | -14.38 | 648.35 |
| SE4 | 422.63 | -30.81 | 1765.38 |
Commentary A significant price spread was observed across the Swedish bidding areas on March 22. SE3, with an average price of 317.04 SEK/MWh, was considerably more expensive than SE1 (105.74 SEK/MWh) and SE2 (88.41 SEK/MWh), but cheaper than SE4 (422.63 SEK/MWh). The minimum prices in SE2, SE3, and SE4 all dipped into negative territory, with SE4 experiencing the lowest at -30.81 SEK/MWh. This indicates a surplus of generation, likely from wind power, in the northern areas (SE1, SE2) and some spill-over into SE3 and SE4, coupled with lower demand on a Sunday. The higher prices in SE3 and SE4, despite negative prices elsewhere, suggest persistent transmission constraints limiting the flow of cheaper power from the north to the south of Sweden. SE4 also exhibited extreme volatility with a maximum price of 1765.38 SEK/MWh, highlighting potential local demand spikes or supply limitations exacerbated by these constraints.
News & Geopolitical Context#
The energy market is currently overshadowed by escalating geopolitical tensions in the Middle East. President Donald Trump’s threat to Iran, demanding the opening of the Strait of Hormuz within 48 hours or facing attacks on energy infrastructure, has sent shockwaves through global markets. Iran’s counter-threats against regional energy facilities further exacerbate the situation. This conflict has already led to a “wild west” scenario at sea, with a fifth of global oil and gas transports halted, causing fuel and insurance prices to surge. This directly impacts the cost of energy production and transportation globally, which could indirectly affect the Nordic electricity market through higher fuel costs for thermal generation if needed, and broader economic uncertainty. The potential for a “black Monday” on global stock markets, as noted by SvD Näringsliv, reflects the severe economic implications of this conflict.
Furthermore, reports of helium shortages due to Iranian attacks on Qatari facilities could have broader industrial impacts, particularly for AI giants like Nvidia, which rely on semiconductors manufactured using helium. While not directly an electricity market issue, it underscores the fragility of global supply chains in the face of geopolitical instability.
Several grid-related announcements were also made:
- Planned Unavailability of Electricity Facilities:
- Consumption in FI, Martinlaakso EB01 (Vantaan Energia Oy) due to foreseen maintenance (2026-03-22 10:08 CET).
- Transmission between PL and LT (LITGRID AB) due to foreseen maintenance, impacting trading capacity (multiple announcements on 2026-03-22 09:31-09:32 CET and 2026-03-21 09:34-09:41 CET).
- Transmission between LT and LV (LITGRID AB) due to foreseen maintenance, impacting trading capacity (multiple announcements on 2026-03-22 09:28-09:30 CET and 2026-03-21 09:33 CET).
- Transmission between EE and LV (Elering AS) due to foreseen maintenance, impacting trading capacity (2026-03-22 07:05 CET and 2026-03-21 08:07 CET).
- Production in FI, Niinimäki Windfarm (Helen Oy) due to maintenance (2026-03-21 17:50 CET).
- Production in IE, Coolkeeragh - GU_500040 (C30) (ESB Trading) due to planned maintenance (2026-03-21 14:40 CET).
- Unplanned Unavailability of Electricity Facilities:
- Consumption in FI, Tornio / TW (Gasum Oy) due to staff shortage (2026-03-22 00:28 CET and 2026-03-21 00:06 CET).
- Production in BE, FLEMALLE TH1 (Electrabel SA) due to failure (2026-03-22 09:01 CET).
- Production in SE1: Porjus - G12 (Vattenfall AB), Blisterliden (Volue Oy), Hogaliden (Aneo AS), Blåbergsliden (Volue Oy) due to various failures (multiple announcements on 2026-03-21). These outages in SE1, while not in SE3, can significantly impact overall system balance and contribute to price spreads by limiting the availability of cheaper northern power for export to southern bidding areas like SE3, especially if transmission capacity is already constrained.
- Transmission between EE and FI (Fingrid Oyj) due to failure (2026-03-21 13:38 CET and 2026-03-21 15:13 CET).
- Production in IE, Edenderry Power Plant (Bord na Mona Powergen Ltd) due to fuel issues (2026-03-21 08:29 CET).
The ongoing unplanned outages in SE1 production units (Porjus, Blisterliden, Hogaliden, Blåbergsliden) could reduce local supply, potentially contributing to higher prices in southern Swedish bidding areas if transmission capacity from other regions is limited. The planned transmission outages in the Baltic region (PL-LT, LT-LV, EE-LV, EE-FI) indicate reduced cross-border trading capacities, which can isolate markets and lead to greater price volatility. The unplanned consumption unavailability in Finland also points to potential demand-side disruptions. Overall, these events contribute to market uncertainty and can exacerbate price volatility, particularly during periods of high demand or surplus generation, and play a role in maintaining the north-south price differences.
Ancillary Services#
FCR-N#
| Metric | Price (EUR/MW) |
|---|---|
| Average | 21.27 |
| Minimum | 18.36 |
| Maximum | 28.40 |
Commentary The FCR-N market on March 22, 2026, saw an average price of 21.27 EUR/MW, with a range from 18.36 EUR/MW to 28.40 EUR/MW. This is slightly higher than the previous day’s average of 22.0 EUR/MW (March 21) but remains within the moderate range observed over the last 7 days (18.7 EUR/MW to 35.0 EUR/MW). Notably, today’s prices are significantly lower than the spike to 35.0 EUR/MW seen on March 19, indicating less frequency stress on the system today compared to the middle of the week. The relatively stable pricing suggests sufficient capacity to maintain system frequency in normal operation.
FCR-D#
| Metric | Price (EUR/MW) |
|---|---|
| Up Average | 3.32 |
| Up Minimum | 1.59 |
| Up Maximum | 4.51 |
| Down Average | 7.61 |
| Down Minimum | 2.21 |
| Down Maximum | 13.22 |
Commentary FCR-D prices for March 22 showed a clear difference between up and down regulation. FCR-D Up averaged 3.32 EUR/MW, while FCR-D Down averaged 7.61 EUR/MW. The higher price for FCR-D Down suggests a greater need for downward regulation capacity, indicating a tendency towards oversupply in the system. Comparing to the 7-day history, today’s FCR-D Up average is higher than yesterday’s 2.6 EUR/MW but lower than the 7-day maximum of 9.5 EUR/MW. FCR-D Down average is higher than yesterday’s 4.1 EUR/MW but lower than the 7-day maximum of 14.8 EUR/MW. This indicates a continued need for regulating downward, though less acutely than some previous days.
mFRR CM#
| Metric | Price (EUR/MW) |
|---|---|
| Up Average | 2.48 |
| Up Minimum | 1.98 |
| Up Maximum | 3.88 |
| Down Average | 4.58 |
| Down Minimum | 1.00 |
| Down Maximum | 21.50 |
Commentary The mFRR Capacity Market (CM) also reflected a bias towards downward regulation. The average price for mFRR Up was 2.48 EUR/MW, while mFRR Down averaged 4.58 EUR/MW. The maximum price for mFRR Down reached 21.50 EUR/MW, indicating specific hours with high demand for downward regulation. These prices are generally lower than the previous day’s and the 7-day averages for regulation hours. The lower average prices suggest less overall tension in the capacity market for mFRR today compared to recent days.
mFRR EAM#
| Metric | Value |
|---|---|
| Imbalance Average (EUR/MWh) | 18.68 |
| Imbalance Minimum (EUR/MWh) | -8.00 |
| Imbalance Maximum (EUR/MWh) | 166.46 |
| Activated Up Total (MW) | 174.0 |
| Activated Down Total (MW) | 1904.0 |
| Up Regulation Hours | 2 |
| Down Regulation Hours | 8 |
| Average Up Spread (EUR) | 52.24 |
| Average Down Spread (EUR) | -25.30 |
| Max Up Spread (EUR) | 89.40 (00:00 CET) |
| Max Down Spread (EUR) | -37.57 (05:00 CET) |
Commentary The mFRR Energy Activation Market (EAM) data for March 22 highlights a significant need for down-regulation. Total activated down regulation was 1904.0 MW, substantially higher than the 174.0 MW for up regulation. This is further evidenced by 8 hours of down regulation compared to only 2 hours of up regulation. The average imbalance price was 18.68 EUR/MWh, but the hourly profile shows significant deviations. The average spread for up regulation was 52.24 EUR, peaking at 89.40 EUR at 00:00 CET, indicating high value for additional supply during that hour. Conversely, the average spread for down regulation was -25.30 EUR, with a maximum negative spread of -37.57 EUR at 05:00 CET. This large negative spread, coupled with extensive down-regulation, directly correlates with the negative day-ahead spot prices observed during the early morning and midday hours, suggesting an oversupply of generation, likely from renewables, that required significant curtailment. Compared to the 7-day ancillary history, today’s mFRR imbalance average of 18.68 EUR/MWh is considerably lower than the period average of 54.4 EUR/MWh. Furthermore, today’s 8 down-regulation hours represent a significant improvement from the highly stressed conditions seen on March 19 and 20, which recorded 22 and 21 down-regulation hours respectively, indicating that while down-regulation is still prevalent, the system was less acutely imbalanced today.
Weather Conditions#
| City | Temp Avg (°C) | Wind Avg (m/s) | Cloud Avg (%) | Precip Total (mm) |
|---|---|---|---|---|
| Göteborg | 4.0 | 4.3 | 3.0 | 0.0 |
| Linköping | 5.4 | 3.2 | 2.0 | 0.0 |
| Stockholm | 6.1 | 4.4 | 4.0 | 0.0 |
Commentary Forecasted weather for March 22 across SE3 cities indicates mild spring conditions. Average temperatures range from 4.0°C in Göteborg to 6.1°C in Stockholm. Wind speeds are moderate, averaging between 3.2 m/s and 4.4 m/s. Cloud cover is minimal, ranging from 2.0% to 4.0%, and no precipitation is expected. These conditions, particularly the clear skies and moderate wind, suggest favorable conditions for solar power generation and potentially some wind power, contributing to the overall supply.
Comparing to the 7-day weather history, today’s average temperature of approximately 5.2°C (average of the three cities) is consistent with the period average of 4.8°C. Wind speeds are also in line with the 7-day average of 3.6 m/s. Crucially, today’s forecast of 0.0 mm precipitation and low cloud cover stands in stark contrast to earlier days in the past week, which saw significant precipitation (e.g., 16.5 mm on March 15 and 19.7 mm on March 16) and higher cloud cover. This combination of mild temperatures (reducing heating demand), moderate wind, and predominantly clear and dry skies likely boosted renewable energy output, particularly solar, which, coupled with lower Sunday demand, contributed significantly to the observed low and negative spot prices.
Grid & Market Events#
The following Unavailability Market Messages (UMMs) were active or published on March 21-22, 2026:
- 2026-03-22 10:08 CET: Planned, Unavailability of electricity facilities: Consumption, FI, Martinlaakso EB01 (Vantaan Energia Oy) - Foreseen maintenance.
- 2026-03-22 09:32 CET: Planned, Unavailability of electricity facilities: Transmission, PL → LT, LT → PL (LITGRID AB) - Foreseen maintenance, trading capacity calculated according to Capa…
- 2026-03-22 09:31 CET: Planned, Unavailability of electricity facilities: Transmission, PL → LT, LT → PL (LITGRID AB) - Foreseen maintenance, capacity calculated based on principles defin…
- 2026-03-22 09:30 CET: Planned, Unavailability of electricity facilities: Transmission, LT → LV, LV → LT (LITGRID AB) - Foreseen maintenance, trading capacity calculated based on principl…
- 2026-03-22 09:28 CET: Planned, Unavailability of electricity facilities: Transmission, LT → LV, LV → LT (LITGRID AB) - Foreseen maintenance, capacity calculated based on principles defin…
- 2026-03-22 09:01 CET: Unplanned, Unavailability of electricity facilities: Production, BE, FLEMALLE TH1 (Electrabel SA) - Failure, awaiting information.
- 2026-03-22 07:05 CET: Planned, Unavailability of electricity facilities: Transmission, EE → LV, LV → EE (Elering AS) - Foreseen maintenance, trading capacity calculated based on principa…
- 2026-03-22 00:28 CET: Unplanned, Unavailability of electricity facilities: Consumption, FI, Tornio / TW (Gasum Oy) - Failure, staff shortage.
- 2026-03-21 23:26 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Porjus - G12 (Vattenfall AB) - Failure, unknown reason.
- 2026-03-21 20:35 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Blisterliden (Volue Oy) - Failure, technical problems.
- 2026-03-21 20:34 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Hogaliden (Aneo AS) - Failure, grid failure.
- 2026-03-21 19:56 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Blåbergsliden (Volue Oy) - Failure, technical problems.
- 2026-03-21 19:56 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Blisterliden (Volue Oy) - Failure, technical problems.
- 2026-03-21 17:52 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Hogaliden (Aneo AS) - Failure, grid failure.
- 2026-03-21 17:50 CET: Planned, Unavailability of electricity facilities: Production, FI, Niinimäki Windfarm (Helen Oy) - Foreseen maintenance.
- 2026-03-21 17:44 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Blåbergsliden (Volue Oy) - Failure, technical problems.
- 2026-03-21 17:43 CET: Unplanned, Unavailability of electricity facilities: Production, SE1, Blisterliden (Volue Oy) - Failure, technical problems.
- 2026-03-21 17:18 CET: Other market information, NL (Electrabel SA) - Event start 22.03.2026 00:00, stop 22.03.2026 18:00.
- 2026-03-21 17:03 CET: Unplanned, Unavailability of electricity facilities: Production, IE, Coolkeeragh - GU_500040 (C30) (ESB Trading) - Failure, off line water wash and Brush Gear.
- 2026-03-21 16:10 CET: Unplanned, Unavailability of electricity facilities: Production, NO2, Sønå H - G1 (Aktieselskapet Saudefaldene) - Failure, bearing temperature fault. (Dismissed at 16:33 CET)
- 2026-03-21 15:13 CET: Unplanned, Unavailability of electricity facilities: Transmission, EE → FI, FI → EE (Fingrid Oyj) - Failure.
- 2026-03-21 14:40 CET: Planned, Unavailability of electricity facilities: Production, IE, Coolkeeragh - GU_500040 (C30) (ESB Trading) - Foreseen maintenance.
- 2026-03-21 13:38 CET: Unplanned, Unavailability of electricity facilities: Transmission, EE → FI, FI → EE (Fingrid Oyj) - Failure.
- 2026-03-21 09:41 CET: Planned, Unavailability of electricity facilities: Transmission, PL → LT, LT → PL (LITGRID AB) - Foreseen maintenance.
- 2026-03-21 09:34 CET: Planned, Unavailability of electricity facilities: Transmission, PL → LT, LT → PL (LITGRID AB) - Foreseen maintenance.
- 2026-03-21 09:33 CET: Planned, Unavailability of electricity facilities: Transmission, LT → LV, LV → LT (LITGRID AB) - Foreseen maintenance.
- 2026-03-21 08:29 CET: Unplanned, Unavailability of electricity facilities: Production, IE, Edenderry Power Plant (Bord na Mona Powergen Ltd) - Failure, fuel issues.
- 2026-03-21 08:07 CET: Planned, Unavailability of electricity facilities: Transmission, EE → LV, LV → EE (Elering AS) - Foreseen maintenance.
- 2026-03-21 00:06 CET: Unplanned, Unavailability of electricity facilities: Consumption, FI, Tornio / TW (Gasum Oy) - Staff shortage.
Commentary The grid saw a mix of planned and unplanned outages, both within Sweden and in interconnected regions. Multiple unplanned production outages in SE1 (Porjus, Blisterliden, Hogaliden, Blåbergsliden) due to technical problems and grid failures could reduce the available generation capacity in northern Sweden. These outages, combined with existing transmission limitations between the northern and southern bidding areas, likely contributed to the significant north-south price spread observed today. The inability to fully transmit cheaper northern power to SE3 and SE4 due to these constraints means southern areas face higher prices even when there’s a surplus further north.
Internationally, planned maintenance on transmission lines connecting Poland, Lithuania, Latvia, Estonia, and Finland suggests reduced cross-border trading opportunities. This fragmentation can lead to higher prices in areas that typically rely on imports or lower prices in areas with surplus generation that cannot be easily exported. The unplanned consumption unavailability in Finland (Tornio / TW) and production unavailability in Belgium (FLEMALLE TH1) and Ireland (Coolkeeragh, Edenderry) indicate broader system challenges across Europe. The “Other market information” for NL, active from 00:00 to 18:00 CET on March 22, might also indicate reduced trading capacity or specific market conditions in the Netherlands that could indirectly affect Nordic flows. Overall, these events contribute to market uncertainty and can exacerbate price volatility, particularly during periods of high demand or surplus generation, and play a crucial role in shaping the price differences across bidding areas.
Implications for BESS in SE3#
The market conditions on March 22, 2026, present clear opportunities for Battery Energy Storage System (BESS) operators in SE3. The significant price spread, including negative day-ahead spot prices during midday (down to -12.27 SEK/MWh at 13:00 CET), followed by high evening peaks (up to 642.35 SEK/MWh at 19:00 CET), creates substantial arbitrage potential. BESS units can charge during the negative or low-price hours (e.g., 12:00-14:00 CET) and discharge during the evening peak demand hours (17:00-21:00 CET) to maximize revenue.
Furthermore, the ancillary service markets, particularly mFRR EAM, show a strong demand for down-regulation. The substantial activated down-regulation (1904.0 MW) and negative spreads (average -25.30 EUR, max -37.57 EUR) indicate that BESS units capable of providing downward regulation services can generate revenue by absorbing excess power during periods of oversupply. While FCR-N and FCR-D prices were moderate, they still offer a baseline revenue stream for providing frequency stability. BESS operators should focus on optimizing their bidding strategies to capture both day-ahead arbitrage and ancillary service revenues, especially leveraging the opportunities presented by negative prices and high down-regulation needs.
Outlook#
Looking ahead, the Nordic electricity market, and SE3 specifically, will remain highly sensitive to evolving geopolitical events in the Middle East. The ongoing threats to energy infrastructure and shipping lanes in the Strait of Hormuz could lead to sustained high fuel and insurance costs, indirectly impacting electricity prices. Domestically, while mild weather and moderate wind are expected to continue, any significant shifts in renewable generation or unexpected grid outages, particularly in the transmission network, could quickly alter market dynamics and price spreads between bidding areas. BESS operators should monitor these factors closely, adapting their strategies to capitalize on volatility and provide crucial flexibility to the grid. The trend of strong down-regulation needs in the mFRR market is likely to persist during periods of high renewable output and low demand, offering continued opportunities for storage assets.