This page shows daily plots of forecast grid data for offshore wind energy in Belgium, year 2023. We use quarter hour forecast data from Elia, which is corrected with up-scaled measurement data for the monitored capacity. The monitored capacity can deviate from the installed capacity; and it can change over time. Therefore values normalized to kWh/day per kWpeak, and also hourly fluctuations are provided. In general grid forecast data is more accurate than weather re-analysis from satellite data.

offshore	2023	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	2.26	2.25	2.25	2.25	2.25	2.25	2.26	2.26	2.26	2.26	2.26	2.26	2.26
Cumulative energy (GWh)	8012	979	1541	2359	2893	3353	3751	4442	4864	5205	5994	6937	8012
Monthly energy (GWh)	8012	979	562	818	534	460	398	690	422	341	789	943	1075
Normalized cumulative sum (kWh/kWpeak)	3547	434	684	1046	1283	1487	1664	1969	2156	2306	2655	3072	3547
Normalized monthly energy (kWh/kWpeak)	3547	434	249	363	237	204	176	305	187	151	349	417	475
Normalized cumulative distribution [%]	100 %	12.2 %	19.3 %	29.5 %	36.2 %	41.9 %	46.9 %	55.5 %	60.8 %	65.0 %	74.9 %	86.6 %	100 %
Normalized monthly distribution [%]	100 %	12.2 %	7.02 %	10.2 %	6.68 %	5.76 %	4.97 %	8.6 %	5.27 %	4.25 %	9.83 %	11.8 %	13.4 %
Capacity factor [%]	40.5 %	58.4 %	37.1 %	48.8 %	32.9 %	27.4 %	24.5 %	41.0 %	25.1 %	20.9 %	46.8 %	57.9 %	63.9 %

Average hourly data:
The plots below show hourly data, normalized to kiloWatt per installed capacity expressed in kiloWatt peak. The Elia grid data contains four data points per hour, these are averaged to represent a single hour on the plot. So the hour 14 combines data points from 14:00, 14:15, 14:30 and 14:45 for example. In the legend we display the avarage daily generated energy in kWhpeak per month. The maximum achievable energy per day is 24 kWh per kWpeak of installed capacity, since there are 24 hours in a day. Fluctuations are summarized with boxplots for the entire year and per month.

Acknowledgement: many thanks to Elia for open access to offshore wind grid data of Belgium at www.elia.be/en/grid-data. This data is licensed under the Elia Open Data License, which uses the CC BY-4.0 public license, and is governed by Belgian law.

User guide: most of the figures on this page are dynamic boxplots. A png image can be downloaded with the pop-up window at the right upper side. These functions require that javascript is enabled. Boxplots are explained here.