This page shows daily plots of forecast grid data for solar photovoltaic energy in Belgium, year 2013. 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.

solar	2013	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	2.92	2.92	2.92	2.92	2.92	2.92	2.92	2.92	2.92	2.92	2.92	2.92	2.92
Cumulative energy (GWh)	2424	33.3	116	283	577	869	1198	1588	1913	2149	2300	2357	2424
Monthly energy (GWh)	2424	33.3	82.5	167	294	292	329	390	325	236	151	56.5	67.3
Normalized cumulative sum (kWh/kWpeak)	831	11.4	39.7	97.2	198	298	411	545	656	737	789	808	831
Normalized monthly energy (kWh/kWpeak)	831	11.4	28.3	57.4	101	100	113	134	112	80.8	51.8	19.4	23.1
Normalized cumulative distribution [%]	100 %	1.38 %	4.78 %	11.7 %	23.8 %	35.9 %	49.4 %	65.5 %	78.9 %	88.7 %	94.9 %	97.2 %	100 %
Normalized monthly distribution [%]	100 %	1.38 %	3.4 %	6.91 %	12.1 %	12.0 %	13.6 %	16.1 %	13.4 %	9.73 %	6.23 %	2.33 %	2.78 %
Capacity factor [%]	9.5 %	1.54 %	4.21 %	7.73 %	14.0 %	13.5 %	15.6 %	18.0 %	15.0 %	11.2 %	6.95 %	2.69 %	3.1 %

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 solar 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.