TenneT TSO B.V.

TenneT transparency data

TenneT operates the Dutch high-voltage grid and publishes through an API portal how the grid is kept in balance: imbalance prices and volumes per quarter hour, the activation of reserve power (aFRR, mFRR), the merit order list, available cross-border capacity and metered injections. You need a free key, each API allows only a limited number of requests a day (often only 25), and the terms forbid passing the data on to others. That is why there are no TenneT figures here; the chart comes from the CBS electricity balance.