2026-04-30+00:0014:30:29+00:0017http://www.tennet.euORG-0001TenneT TSO B.V.Utrechtseweg 310Arnhem6812ARNL226NLD09155985Rogier van der Woning+31650092034rogier.vander.woning@tennet.euhttps://www.rechtspraak.nl/Organisatie-en-contact/Organisatie/Rechtbanken/Rechtbank-Gelderland/Paginas/default.aspx ORG-0002Rechtbank Gelderland, zittingsplaats ArnhemWalburgstraat 2-4Arnhem6811 CDNL226NLD82940827+31 883612000infobalie.rb-gel.arnhem@rechtspraak.nl00305448-202686/20262026-05-05+02:002.3eforms-sdk-1.13a8ecfb9b-78c8-4aed-80ff-bd92f4ad4e67aa6ffb62-35f8-45d4-9a44-e40186ba555f2026-04-30+00:0008:17:12+00:00012026-05-01Z32014L0025cn-standardENGhttps://s2c.mercell.com/buyer/1286electricityORG-0001epo-sub-espdneg-w-callfalse211e5687-17c3-4ff2-84c7-3e8671041fc5Metering Data Management systemTenneT is initiating a European tender to select a supplier and solution for a new Metering Data Management System ('Nemesys'). Nemesys should be the next-generation platform supporting metering data processing, allocation, and settlement-related services.  Nemesys is intended to be future-proof by design: the solution must remain upgradeable, transparent and controllable over its lifecycle. TenneT therefore positions “configured standard first” as the default approach, with bespoke extensions only where truly necessary and without compromising vendor upgrades. The scope includes: - The end-to-end chain functionality from metering data intake (telemetry and periodic) through validation and correction, allocation and reconciliation support, distribution and integration, as well as reporting and operational control. - Master/reference data ('MRD') capabilities. These are required initially through a temporary MRD capability, with a clear migration path to synchronisation from a future TenneT enterprise MRD. - Migration of operational data that is essential to run Nemesys (historical data will not be migrated but be archived).services120000007226800072230000722600007226300072267000See documentation on the Mercell platformanyw-couNLDLOT-0000not-allowedno-eu-fundsfalsenot-allowedfalseENGTender documents on the Mercell platformnon-restricted-documenthttps://s2c.mercell.com/today/199912N/Anoneepo-procurement-documentfalseallowedtrueUse of Non Disclosure Agreement is mandatory for the initial offer phase.nonot-allowedperformanceDelivery of a Metering Data Management solutionORG-0001https://s2c.mercell.com/today/199912ORG-0002ORG-0002ENGtruetruerequiredtrue2026-06-15+00:0008:00:00+00:00true4falsenonenone6d791596-73df-42b0-9b22-e97704df5e9dMetering Data Management systemTenneT is initiating a European tender to select a supplier and solution for a new Metering Data Management System ('Nemesys'). Nemesys should be the next-generation platform supporting metering data processing, allocation, and settlement-related services.  Nemesys is intended to be future-proof by design: the solution must remain upgradeable, transparent and controllable over its lifecycle. TenneT therefore positions “configured standard first” as the default approach, with bespoke extensions only where truly necessary and without compromising vendor upgrades. The scope includes: - The end-to-end chain functionality from metering data intake (telemetry and periodic) through validation and correction, allocation and reconciliation support, distribution and integration, as well as reporting and operational control. - Master/reference data ('MRD') capabilities. These are required initially through a temporary MRD capability, with a clear migration path to synchronisation from a future TenneT enterprise MRD. - Migration of operational data that is essential to run Nemesys (historical data will not be migrated but be archived).services120000007226800072230000722600007226300072267000See documentation on the Mercell platformanyw-couNLD17See tender documentation on the Mercell platform3An initial period of seven (7) years, including implementation, with the options to extend the agreement by an additional five (5) years, followed by three (3) years, and subsequently by two (2) years, resulting in a maximum contract term of seventeen (17) years in total.