This page shows daily plots of forecast grid data for offshore wind energy in Belgium, year 2021. 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	2021	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25	2.25
Cumulative energy (GWh)	6774	736	1551	2160	2641	3102	3315	3720	4252	4580	5388	5979	6774
Monthly energy (GWh)	6774	736	815	609	481	461	213	405	532	328	808	591	795
Normalized cumulative sum (kWh/kWpeak)	3005	326	688	958	1172	1376	1471	1650	1886	2031	2390	2652	3005
Normalized monthly energy (kWh/kWpeak)	3005	326	362	270	214	205	94.5	180	236	145	359	262	353
Normalized cumulative distribution [%]	100 %	10.9 %	22.9 %	31.9 %	39.0 %	45.8 %	48.9 %	54.9 %	62.8 %	67.6 %	79.5 %	88.3 %	100 %
Normalized monthly distribution [%]	100 %	10.9 %	12.0 %	8.99 %	7.11 %	6.81 %	3.15 %	5.97 %	7.85 %	4.84 %	11.9 %	8.73 %	11.7 %
Capacity factor [%]	34.3 %	43.9 %	53.8 %	36.3 %	29.7 %	27.5 %	13.1 %	24.1 %	31.7 %	20.2 %	48.1 %	36.4 %	47.4 %

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.