Siso at a Glance
Siso is a Kraftverk (run-of-river or reservoir hydropower facility) located in Sørfold municipality, Nordland county, Norway. The plant has been operational since 6 September 1968 and is registered with the Norwegian Water Resources and Energy Directorate (NVE) under facility ID 366 [1]. It operates within the NO4 electricity price zone, serving the northern Norwegian power market [3].
The facility draws water from the elv fra Straumvatnet watershed system, integrating into the broader hydrological context of the region [8]. As an established hydropower asset with over five decades of operational history, Siso represents a mature, grid-connected power generation source in a strategically important region for Nordic energy infrastructure.
Ownership & Operator
Siso is owned and operated by **SISO ENERGI AS** (Norwegian business registration number 986530673), the primary concession holder [6]. This entity holds the legal right to generate and distribute power from the facility under the terms of its NVE concession, which remains in active status [10].
For detailed information about SISO ENERGI AS, including portfolio composition, financial performance, and other operational assets, visit the owner profile page.
Hydrological Context
The plant draws water from the **elv fra Straumvatnet** watershed [8]. This water system is integral to understanding the facility's seasonal production patterns, flood risk mitigation, and long-term hydrological reliability. Investors should review the river profile for precipitation data, runoff characteristics, and historical flow patterns that influence annual energy yield.
Regional Location & Grid Integration
County (Fylke): Nordland [4] Municipality (Kommune): Sørfold [5] Electricity Price Zone: NO4 [3]
Siso benefits from proximity to critical grid infrastructure. The nearest Statnett transformer station is located at Siso kraftverk itself, approximately 0.2 km away, operating at 132 kV [11]. This minimal distance ensures efficient power evacuation and grid stability. The nearest industrial cluster is Glomfjord Industripark, situated approximately 96 km away [12], providing context for potential industrial off-take opportunities or regional demand patterns.
Data Centre Suitability Assessment
HydroSec Rating: Grade A [9]
Siso receives a Grade A assessment for data centre hosting suitability, indicating that the facility's technical and infrastructure characteristics support high-reliability power supply for mission-critical computing loads. This rating reflects:
- Operational maturity: Over 55 years of continuous operation demonstrates proven reliability and technical competence.
- Grid proximity: Direct connection to a 132 kV Statnett transformer station ensures stable, high-quality power delivery with minimal transmission losses.
- Renewable energy profile: Hydropower generation aligns with ESG requirements for data centre operators seeking carbon-neutral infrastructure.
- Regional stability: Nordland's hydropower-rich environment provides diversified supply and grid resilience.
The Grade A rating qualifies Siso for consideration in tier-1 data centre power supply agreements, subject to capacity and commercial terms negotiation.
What Becomes Available After Login
HydroSec's registered users gain access to detailed operational and financial metrics currently restricted from public view:
- Installed capacity (MaksYtelse) and maximum output specifications
- Historical production data (MidProd) and seasonal yield patterns
- Gross head (BruttoFallhoyde) and detailed hydrological parameters
- Sub-component scoring for data centre suitability (cooling, grid stability, redundancy)
- Detailed site infrastructure maps and equipment specifications
- Financial performance benchmarks and operational cost estimates
- Concession terms and renewal timelines
These data points enable asset managers, family offices, and institutional investors to conduct rigorous due diligence and comparative analysis across Norway's hydropower portfolio.
Risks and Limitations
Hydrological Variability: Hydropower output depends on precipitation and runoff, which fluctuate seasonally and annually. Drought periods may reduce generation below historical averages, affecting revenue projections.
Regulatory Risk: The NVE concession remains subject to Norwegian energy policy changes, environmental regulations, and potential renewal conditions. Future legislation may impose additional operational constraints or cost obligations.
Market Price Risk: Power prices in the NO4 zone are subject to Nordic electricity market dynamics, weather-driven supply variations, and macroeconomic factors beyond the operator's control.
Infrastructure Aging: While Siso has demonstrated long-term reliability, equipment approaching or exceeding design life may require capital-intensive refurbishment or replacement, impacting future cash flows.
Grid Dependency: Power evacuation relies on Statnett infrastructure. Planned or emergency maintenance on the 132 kV connection could temporarily constrain output.
Data Limitations: This public profile excludes specific capacity, production, and financial figures. Investment decisions should be based on complete due diligence including site visits, technical audits, and legal review of concession terms.
No Guarantee of Returns: Historical performance does not guarantee future results. Hydropower assets are subject to commodity price exposure, operational risk, and regulatory uncertainty.
For comprehensive risk assessment and financial modeling, registered users should review the full technical dataset and consult with qualified energy sector advisors.