This page shows daily plots of forecast grid data for onshore 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.

onshore	2021	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	2.54	2.42	2.42	2.43	2.58	2.58	2.58	2.58	2.58	2.58	2.62	2.63	2.63
Cumulative energy (GWh)	3978	388	828	1223	1514	1940	2085	2337	2591	2779	3268	3545	3978
Monthly energy (GWh)	3978	388	439	396	290	426	146	252	255	187	489	277	433
Normalized cumulative sum (kWh/kWpeak)	1565	161	342	506	618	783	840	937	1036	1109	1295	1401	1565
Normalized monthly energy (kWh/kWpeak)	1565	161	182	163	113	165	56.5	97.6	98.7	72.6	187	106	165
Normalized cumulative distribution [%]	100 %	10.3 %	21.9 %	32.3 %	39.5 %	50.0 %	53.6 %	59.9 %	66.2 %	70.8 %	82.7 %	89.5 %	100 %
Normalized monthly distribution [%]	100 %	10.3 %	11.6 %	10.4 %	7.19 %	10.6 %	3.61 %	6.24 %	6.31 %	4.64 %	11.9 %	6.74 %	10.5 %
Capacity factor [%]	17.9 %	21.6 %	27.1 %	22.0 %	15.6 %	22.2 %	7.84 %	13.1 %	13.3 %	10.1 %	25.0 %	14.7 %	22.1 %

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 onshore 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.