Source - Göteborg Energi Elektrifieringsrapporten nr 1 (2025)

Göteborg Energi — Elektrifieringsrapporten nr 1 (2025) Göteborg Energi’s first Elektrifieringsrapport (electrification report), published June 2025 (dated 12 June 2025 in filename metadata). A 27-page strategic/operational report covering flexibility market outcomes, battery deployment, EV integration, grid tariff design, and digital infrastructure in the Gothenburg area. Combines quantitative data from Effekthandel Väst Season 4, pilot results from behavioral tariff experiments, and qualitative analysis of barriers and enablers.

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Document overview

The report is framed around Göteborg Energi’s work on the energy transition, with focus on their role as DSO (Göteborg Energi Nät AB) and as energy company. It presents:

1. Effekthandel Väst Season 4 (2024/25) outcomes with the first comprehensive public data on the market
2. V2G breakthrough — world’s first V2G delivery to a local flexibility market
3. CheckWatt as largest aggregated battery portfolio in Effekthandel Väst
4. BESS deployment barriers (building permits)
5. Svenska kraftnät capacity services for Hisingen/Stenungsund as first long-term BESS revenue certainty
6. Tidsindelade effektavgifter (time-divided demand tariffs) — behavioral data from the first season
7. RISE API for grid prices
8. Port of Gothenburg electrification and flexibility contribution

Key findings by topic

Effekthandel Väst Season 4 (V2024/25)

The report provides the first comprehensive public overview of Season 4 (V2024/25), confirming and supplementing the FlexAbility Delrapport 2 data:

• Total activated volume: 930 MWh across Effekthandel Väst (including both Göteborg and Mölndal sub-markets), described as roughly doubled compared to the previous season — but this comparison likely refers to activation volume (fria bud + ShortFlex) rather than including LongFlex/MaxUsage availability hours
• FSPs: 27 FSPs with 539 registered resources in the Göteborg sub-market (consistent with FlexAbility Delrapport 2 data)
• DSO need fulfilled: the market successfully delivered when the grid needed it; no specific capacity events described in this document
• Capacity 2028: Göteborg Energi Nät faces a significant capacity bottleneck from around 2028 related to Hisingen/Stenungsund industrial electrification and new grid connections; the market is explicitly positioned as a tool to manage this transition

The 930 MWh figure and “doubled” description likely reflect activations (fria bud / ShortFlex) being the metric used in the market communications context, not the much larger LongFlex availability hours visible in FlexAbility Tabell 8 data.

V2G breakthrough — world first

In March 2025, four Volvo Cars electric vehicles (used by Volvo Cars employees) successfully delivered 111 kWh of flexibility in 2 activations to Effekthandel Väst. This is described as a world first: the first time V2G-capable EVs delivered flexibility directly to a local distribution system operator flexibility market.

Technical pathway:

• Volvo Cars provided access to V2G-capable EVs (XC40 Recharge / EX40 with bidirectional capability)
• CheckWatt aggregated the EVs alongside stationary batteries in its portfolio
• When Effekthandel Väst issued an activation signal, the EVs discharged to grid
• Metering and settlement handled through NODES

Scale context: 111 kWh across 2 activations from 4 vehicles is small. The significance is demonstration, not volume — it proves the technical and regulatory pathway for V2G in Swedish DSO flexibility markets.

Barriers remaining: the full V2G potential estimated at 5,000 MW by 2030 (FlexAbility Delrapport 1) faces Svk’s physical address requirement, incomplete ISO 15118 deployment, and immature business models. See Energy Storage › V2G structural barriers.

CheckWatt aggregation case study

CheckWatt is the largest aggregated battery portfolio in Effekthandel Väst. As of the report date (June 2025):

• ~500 stationary batteries under management (primarily household hembatterier and small commercial BESS)
• Total capacity: approximately 5.5 MW (split as ~4.8 MW + 0.7 MW across two portfolio segments)
• Dual-market strategy: CheckWatt participates simultaneously in Effekthandel Väst (local DSO flex market) and in national balancing markets (FCR/aFRR/mFRR via Svenska kraftnät)
• Value stacking: resources are allocated dynamically between the local and national market depending on which offers higher expected revenue at any given time

This case confirms that the theoretical value stacking described in Balancing Markets › FCR-D as preferred product for batteries and EVs (from CoordiNet) is operational at scale in Gothenburg. The CheckWatt portfolio at ~500 batteries / 5.5 MW is also consistent with the aggregator referenced in FlexAbility Delrapport 5 (2025) as having “approximately 500 MW of qualified flexibility resources” — though the FlexAbility figure likely refers to nationally qualified resources across multiple markets, while this document gives the Göteborg-specific active portfolio.

BESS deployment barriers — building permit

The report highlights bygglov (building permit) as the primary practical barrier for deploying BESS in urban environments:

• Stationary batteries above certain size thresholds (typically related to fire risk, energy content) require building permits in Sweden
• The permit process adds months to deployment timelines
• Urban locations (where grid congestion is most acute) are the hardest — planning constraints, heritage buildings, multi-tenant ownership
• The 9,500 MW battery connection queue at E.ON (FlexAbility 2025) includes projects that are delayed or cancelled for permit reasons, not only grid access reasons

A separate finding comes from Energiforsk research cited in the report: the binding constraint for connecting stationary BESS to the grid is transfer capacity (how much power can flow to/from the BESS connection point), not voltage quality (as was previously assumed). This means:

• More BESS can be connected to existing grid infrastructure than previously estimated
• Voltage quality improvements from BESS (reactive power, harmonics) are real but not the bottleneck
• Transfer capacity is the relevant sizing constraint for both BESS and DSO investment decisions

Implication: grid investment targeting transfer capacity — not just power quality — is the right lens for enabling BESS scale-up.

Svenska kraftnät capacity services — Hisingen/Stenungsund

Svenska kraftnät has announced multi-year capacity service contracts for the Hisingen and Stenungsund areas, beginning around 2027. These are structured long-term agreements where BESS operators receive payment for making their capacity available to Svk for system operation purposes during expected scarcity periods.

Significance:

• First structured long-term revenue certainty for large BESS projects in Sweden outside spot arbitrage and FCR markets
• Hisingen (an island in Gothenburg) and Stenungsund (industrial cluster north of Gothenburg) face capacity shortfalls as industrial electrification proceeds faster than grid reinforcement
• Multi-year contracts de-risk BESS investment — investors can underwrite project financing against a contracted revenue stream
• Svk is acting here as a capacity procurer at the transmission/TSO level (not a DSO); this is analogous to capacity markets in other systems but using bilateral contracts rather than a centralized auction

This represents a new revenue channel for BESS distinct from (and potentially stacked with) FCR, aFRR, mFRR, and local flex markets.

Tidsindelade effektavgifter — behavioral outcomes

Göteborg Energi Nät introduced tidsindelade effektavgifter (time-divided demand tariffs) on a voluntary basis from 5 February 2025. This is a new tariff design that divides the day into pricing periods, charging higher demand fees during peak hours and lower fees off-peak.

Enrollment and behavioral data from the first season:

These behavioral responses confirm that effekttariffer drive measurable demand response — both shifting consumption away from peak periods and creating rebound loads at period transitions.

Rebound implication: the 16% rise at 20:00 (when the peak period ends and prices drop) creates a new peak. This is the classic rebound effect — individual optimization creates an aggregate problem. The new peak at 20:00 is smaller than the 07:00 morning peak, but it is not negligible. DSOs designing time-divided tariffs must account for rebound peaks.

Policy context: Göteborg Energi Nät is one of the five DSOs named in Ei‘s April 2026 effektavgifter tillsyn (investigation). The tillsyn examines whether Göteborg Energi Nät’s effektavgift design complies with the legal standard (Art. 18 EMR, ellagen) — see Source - Ei Tillsyn Elnätsavgifter (2026).

Dual tariff model: the report notes that GE Nät is testing a dual-tariff model to separate the energy price signal (spot) from the capacity signal (effektavgift), reducing the double-signal conflict identified in Demand Response › Effekttariffer — the double-edged price signal.

RISE API for grid prices

RISE (Research Institutes of Sweden) published an open, free API for network tariff data in March 2025. The API provides:

• Current network tariffs for Swedish DSOs
• Time-varying pricing periods (for DSOs that have implemented time-of-use demand tariffs)
• Standardized format for consumption control applications

Significance: automated optimization of resource scheduling (EV charging, battery dispatch, HEMS) requires real-time knowledge of both the spot price and the network tariff at the customer’s connection point. Until March 2025, no standardized API existed for Swedish network tariff data. DSOs published tariffs in various formats (PDFs, CSVs, proprietary APIs) — making it expensive for aggregators and device manufacturers to integrate local tariff signals into their optimization algorithms.

The RISE API addresses this gap: a single integration point for tariff data across participating DSOs. Whether the API will achieve wide DSO adoption (especially the ~120 smaller Swedish DSOs) is not stated; GE Nät is likely an early adopter given their role in this report.

Connection to FlexAbility finding: FlexAbility Delrapport 2 (2025) identified “access to local network tariffs via API” as condition 8 of 9 for unlocking aggregated flexibility. The RISE API is a direct response to this barrier.

Port of Gothenburg electrification

The Port of Gothenburg is undergoing electrification of port operations (shore power for vessels, electric reachstackers, charging for port equipment). The report frames this as a significant new flexible load that could participate in Effekthandel Väst.

Key characteristics that make port loads interesting for flexibility:

• Large, schedulable loads (shore power can be time-shifted within vessel berth windows)
• Predictable patterns (vessel schedules are known in advance)
• Physical location at the grid boundary — port loads are often served by dedicated grid connections whose capacity can be precisely characterized

The report does not provide quantitative data on port flexibility volumes or any actual market participation by port loads as of June 2025.

Göteborg Energi Nät capacity outlook

The report indicates that Göteborg Energi Nät faces a significant capacity bottleneck around 2028 driven by:

• Industrial electrification at Hisingen (process industry, logistics) and Stenungsund (petrochemical cluster)
• New data center connections in the Gothenburg area
• Continued residential electrification (EVs, heat pumps)
• Offshore wind development in the west coast corridor

The flexibility need estimated by GE Nät for this transition is described as approximately 100 MW — a substantial target relative to the current ~30–40 MW qualified in Effekthandel Väst. This underpins both the Svk capacity service contracts (Hisingen/Stenungsund) and GE Nät’s continued investment in the market.

DNDP data cross-reference: Source - Ei Karttjänst DNDP Data (2025) shows Göteborg Energi reporting 0–240 MW of flexibility need across three horizons — the 100 MW figure in this report is consistent with the lower bound of that range, likely representing the near-term (2028) need rather than the 2030–2035 horizon.

Relevance to wiki topics

• Effekthandel Väst — Season 4 quantitative data; V2G breakthrough; CheckWatt case study; 2028 capacity outlook
• Göteborg Energi Nät — primary source for a new entity page; capacity outlook, tariff design, BESS barriers
• Energy Storage — building permit barrier; Energiforsk transfer capacity finding; Svk 2027 capacity services
• Aggregation — CheckWatt dual-market case study (~500 batteries, 5.5 MW, simultaneous local+national)
• Demand Response — tidsindelade effektavgifter behavioral data (13% drop, 16% rebound); dual-tariff model
• Balancing Markets — value stacking in practice; Svk capacity services as new TSO-level BESS revenue stream
• Svenska kraftnät — Svk capacity services for Hisingen/Stenungsund 2027
• Flexibility Market — Effekthandel Väst Season 4 outcomes; ~100 MW flex need estimate; 2028 capacity bottleneck
• NODES — V2G delivery processed through NODES platform; confirmed ongoing operation