Solarposition.org

223 places · sun position · panel angle

Solar data for Belgium

Across the 223 places in Belgium the best fixed tilt for solar panels runs from 38° in Brugge to 39° in Brussels, and flat ground gets 3.0 to 3.1 peak sun hours a day. Every number is computed for each place.

Solar power in Belgium at a glance

Averages over 223 places with climate data, for a fixed array facing south.

Best panel angle39°average, facing south
Peak sun hours3.06a day on flat ground
1 kWp makes1,112kWh a year at the best angle
Off-grid angle72°average, for the darkest month
BrusselsKnokke-Heist (most sun)
  • 3.01–3.03
  • 3.03–3.06
  • 3.06–3.08
  • 3.08–3.10
  • 3.10–3.13

Peak sun hours a day on flat ground. Each dot is one place. 1 far-off place lies outside the frame.

The sunniest places in Belgium, with 3.13 peak sun hours a day on flat ground, are Knokke-Heist and one other place; the least sunny is Eupen with 3.01. A 1 kWp array at its best angle makes from 1,093 kWh a year in Eupen to 1,136 kWh in Tournai — 1,112 kWh on average.

The best year-round tilt runs from 38° in Brugge to 39° in Brussels. Off-grid systems are sized for the darkest month and do better steeper, at 72° on average: at 70° that month brings 1.19 kWh per kWp a day in Knokke-Heist and 1.45 kWh in Péruwelz.

Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.

Sunniest places in Belgium

Ranked by peak sun hours on flat ground: the yearly average of a day's sunshine energy (NASA POWER climatology). Output: 1 kWp at its best year-round angle.

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
1Knokke-HeistFlanders3.131,13238°
1ArlonWallonia3.131,12838°
3ZwevegemFlanders3.121,13539°
3KortrijkFlanders3.121,13439°
3HarelbekeFlanders3.121,13439°
3IeperFlanders3.121,13439°
3WaregemFlanders3.121,13439°
3PoperingeFlanders3.121,13439°
3IzegemFlanders3.121,13439°
3RoeselareFlanders3.121,13439°

Least sunny places in Belgium

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
214HerveWallonia3.021,09839°
214VerviersWallonia3.021,09739°
214HeusyWallonia3.021,09739°
214MaaseikFlanders3.021,09639°
223EupenWallonia3.011,09339°

Solar by region in Belgium

Averages of the places in each region, sunniest first. Darkest month: what 1 kWp of off-grid panels at 70° makes a day in the worst month of the year.

RegionPlacesSun hours/daykWh per kWp a yearBest tiltDarkest month at 70°Sunniest place
Flanders1453.061,11339°1.27 kWhKnokke-Heist
Wallonia603.051,11239°1.35 kWhArlon
Brussels Capital183.051,10839°1.30 kWhBerchem-Sainte-Agathe

Largest places in Belgium at a glance

PlaceLatitudeBest tiltOff-grid tiltSun hours/day (flat)
Brussels50.9° N39°72°3.05
Antwerp51.2° N39°72°3.04
Gent51.1° N39°72°3.10
Charleroi50.4° N39°72°3.05
Liège50.6° N39°72°3.03
Anderlecht50.8° N39°72°3.05
Schaerbeek50.9° N39°72°3.04
Brugge51.2° N38°72°3.12
Namur50.5° N39°72°3.04
Leuven50.9° N39°72°3.03
Molenbeek-Saint-Jean50.8° N39°72°3.05
Mons50.5° N39°72°3.08
Ixelles50.8° N39°72°3.05
Uccle50.8° N39°72°3.05
Deurne51.2° N39°72°3.03
Hasselt50.9° N39°72°3.03
Aalst50.9° N39°72°3.07
Mechelen51.0° N39°72°3.03
La Louvière50.5° N39°72°3.06
Kortrijk50.8° N39°72°3.12

Daylight and clock time in Belgium

In Hoogstraten (51.4° N), the northernmost place, the longest day of the year lasts 16 h 37 min and the shortest 7 h 51 min; in Arlon (49.7° N), the southernmost, 16 h 19 min and 8 h 07 min. The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Brussels).

Time zonePlacesUTC offsetClocks change in 2026
Europe/Brussels223UTC+1, in summer UTC+2Forward on Sun 29 Mar, back on Sun 25 Oct

Questions about solar in Belgium

What is the best angle for solar panels in Belgium?
Facing south, between 38° and 39° depending on the place — 39° on average over 223 places. Off-grid systems that must get through the darkest month do better steeper, at about 72° on average.
How many peak sun hours does Belgium get?
From 3.0 hours a day in Eupen to 3.1 in Knokke-Heist on flat ground, averaged over the year; 3.1 on average.
How much electricity does 1 kWp of solar panels produce in Belgium?
About 1,112 kWh a year at the best fixed angle on average, from 1,093 kWh in Eupen to 1,136 kWh in Tournai. These are long-term climate averages; a single year can be several per cent higher or lower.
Where is the sunniest place in Belgium?
Knokke-Heist (Flanders) and 1 other place share the most sun of the 223 places: 3.13 peak sun hours a day on flat ground. 1 kWp in Knokke-Heist makes about 1,132 kWh a year.
Does Belgium use daylight saving time?
The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Brussels).
How long is the longest day in Belgium?
16 h 37 min in Hoogstraten; the shortest day lasts 7 h 51 min in Hoogstraten.

All places in Belgium