Published 2026-09-12 · Event 2025-04-01

NVE’s surplus-heat rule is a pre-build analysis duty, not a Norwegian heat contract

From 1 April 2025 the Norwegian Water Resources and Energy Directorate says anyone planning a new data centre above 2 MW of supplied electric power must complete a cost-benefit analysis of surplus-heat use and obtain NVE approval before construction starts. An analysis duty is not a heat-offtake agreement.

NVE’s surplus-heat page, last updated 31 March 2025, is the dated rule source used here. From 1 April 2025 those who plan to build new energy plants, industrial plants, district-heating plants and data centres above a stated size must carry out a cost-benefit analysis of opportunities to use surplus heat. The analysis must be sent to NVE and must be approved by NVE before construction starts. A duty to analyse is not a signed heat sale.

The data-centre threshold must stay the printed threshold. The duty applies to data centres with more than 2 MW of total supplied electric power, and also to certain thermal plants, industrial plants and other installations above 20 MW. The developer is the party that must see the analysis through. Some plants are exempt under the regulation, and in some cases an exemption can be applied for. Those are duty rows. They are not Swedish offtake rows.

The approval sentence must stay an approval sentence. It is the physical construction work that must not start before NVE has approved the analysis, including site preparation and extensive clearing done in order to build the plant. Drawings and other applications may be prepared before approval. NVE may, together with the municipality and county, set a condition that surplus heat is used if the analysis is positive — but the page says that condition power does not apply to data centres and other plants defined by supplied electric power.

Named neighbouring papers stay on their own files. Swedish district-heat notes, Stockholm Open District Heating pages and operator heat contracts are different countries and different instruments. An NVE analysis that finds a profitable surplus-heat potential is still an analysis. It is not a municipal heat agreement and not a reserved Swedish offtake.

DataCenterSweden records 1 April 2025 as the date NVE’s surplus-heat cost-benefit duty entered force. No project identifier is attached. The next update would need a later primary source that names an approved analysis, a refused start or a changed threshold. Until then, 2 MW stays a Norwegian analysis trigger — not a heat contract and not a Swedish hall reservation.

Why it matters

A 2 MW Norwegian surplus-heat duty is easy to file as a required heat reuse contract. The April rule is usable only if the analysis stays an analysis — and only for Norway.

What remains unknown

The fetched page does not name an approved analysis, a refused construction start, a Swedish offtake or a required datacentre heat contract.

Sources