This page shows daily plots of forecast grid data for onshore wind energy in Belgium, year 2019. 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	2019	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	2.09	1.98	1.98	1.98	1.98	2.09	2.12	2.12	2.12	2.12	2.14	2.25	2.25
Cumulative energy (GWh)	3361	318	606	1066	1274	1454	1652	1812	2022	2270	2585	2863	3361
Monthly energy (GWh)	3361	318	288	460	209	179	198	161	210	248	315	277	499
Normalized cumulative sum (kWh/kWpeak)	1608	161	306	538	644	730	823	899	998	1115	1262	1386	1608
Normalized monthly energy (kWh/kWpeak)	1608	161	145	232	105	85.8	93.5	75.9	98.9	117	147	123	222
Normalized cumulative distribution [%]	100 %	10.0 %	19.0 %	33.5 %	40.0 %	45.4 %	51.2 %	55.9 %	62.1 %	69.3 %	78.5 %	86.2 %	100 %
Normalized monthly distribution [%]	100 %	10.0 %	9.04 %	14.4 %	6.56 %	5.34 %	5.81 %	4.72 %	6.15 %	7.28 %	9.17 %	7.68 %	13.8 %
Capacity factor [%]	18.4 %	21.6 %	21.6 %	31.3 %	14.6 %	11.5 %	13.0 %	10.2 %	13.3 %	16.3 %	19.8 %	17.1 %	29.8 %

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.