To combat climate change, we must move away from fossil fuels by 2050. The energy transition will heavily impact electricity grids due to the increasing demand from heat pumps, electric vehicles, and solar panels. Businesses are also rapidly switching to sustainable electricity. Therefore, significant grid reinforcements are needed in the coming years, including in the low-voltage network that serves every home in Flanders. Approximately 40% of these low-voltage grids and 1 in 3 electricity substations in Flanders require an upgrade by 2033. This is part of a larger investment plan by Fluvius.
Fluvius meticulously maps out where cable laying and substation reinforcements are necessary in each city and municipality for the coming years. This involves estimating the growth of solar panels, heat pumps, and electric vehicles in local households and conducting in-depth computer simulations. This allows them to identify priority areas for work. Armed with these analyses, Fluvius and the involved cities and municipalities plan the works with a focus on even distribution and minimal disruption. Collaboration with other utility companies or planned roadworks is also extensively explored.
In Hoeilaart, extensive work is planned. While the current low-voltage grids function perfectly, they may not provide sufficient capacity for the anticipated increase in electric cars, solar panels, and heat pumps. Fluvius cannot reinforce these cables quickly without causing significant disruption. Therefore, grid adjustments are being implemented in phases. This includes reactive measures for customers needing a heavier connection sooner, and proactive reinforcement through collaboration with local authorities, ensuring the electricity grid is ready for increased demand, such as after purchasing an electric car or renovating to replace an old oil or gas boiler with an electric heat pump. Streets with insufficient capacity will be reinforced first.
The planned works in Hoeilaart will occur in several phases. From October 19 to November 6, 2026, work will take place on Overijsesteenweg, Koldamstraat, and Edgard Sohiestraat. Parking bans and diversions will be in effect. The progress of the works is dependent on weather conditions. This page will be updated with any changes to the schedule.
Previous works in 2026 were carried out on Waversesteenweg, Albert Rowiesstraat, Nilleveldstraat, Wijndaalstraat, Brusselsesteenweg, and E. Vandervaerenstraat. In 2025, works were completed on Waversesteenweg, Veldstraat, Regenboogstraat, Gemeenteplein, Kerkstraat, Tenboslaan, Vrijheidslaan, Kelleveldweg, Hazendreef, Meutedreef, and Overwinningsstraat.
