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

onshore	2023	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	3.02	2.99	2.99	2.99	2.99	2.99	3.03	3.05	3.05	3.05	3.05	3.05	3.05
Cumulative energy (GWh)	6260	804	1275	1975	2411	2732	2984	3448	3746	4035	4610	5393	6260
Monthly energy (GWh)	6260	804	471	701	436	321	252	464	297	289	575	783	867
Normalized cumulative sum (kWh/kWpeak)	2070	269	426	661	806	914	997	1149	1246	1341	1529	1786	2070
Normalized monthly energy (kWh/kWpeak)	2070	269	157	234	146	107	83.3	152	97.4	94.7	188	256	284
Normalized cumulative distribution [%]	100 %	13.0 %	20.6 %	31.9 %	39.0 %	44.1 %	48.2 %	55.5 %	60.2 %	64.8 %	73.9 %	86.3 %	100 %
Normalized monthly distribution [%]	100 %	13.0 %	7.61 %	11.3 %	7.04 %	5.18 %	4.02 %	7.34 %	4.7 %	4.58 %	9.1 %	12.4 %	13.7 %
Capacity factor [%]	23.6 %	36.1 %	23.4 %	31.5 %	20.2 %	14.4 %	11.6 %	20.4 %	13.1 %	13.2 %	25.3 %	35.6 %	38.2 %

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.