Belgian developer Storm is installing 106 Tesla Megapack 2XL units at its Langerlo battery park in the port of Genk-Zuid, on the site of a former coal power plant in Limburg province.
The project has a capacity of 100MW/400MWh. Most units have already arrived, and all 106 are to be in place by early November 2026, with electrical connection and finishing works following and grid connection planned for spring 2027. Flemish Environment Minister Jo Brouns and Genk mayor Wim Dries visited the site on 22 October 2026.
The battery park occupies about 2 hectares within a former power plant site of 25 hectares, leaving room for other employers alongside the storage facility.
Ruien: 200MW/800MWh with 180 Tesla units
Langerlo is the smaller of two Storm battery parks being built on former coal plant sites. Ruien, in Kluisbergen, will be 200MW/800MWh using 180 Tesla units across more than 3 hectares, entering operation in autumn 2027. Tesla supplies and installs the batteries for both parks.
In March 2026, Storm estimated the cost of both battery parks at approximately €330 million. Funding comes from Storm itself, infrastructure investor TINC, the Flemish investment company PMV and Belgian infrastructure fund I4B, together with seven banks.
Eneco to trade 300MW/1,200MWh for a decade
Under an agreement concluded in June 2026, energy company Eneco will commercially and operationally manage both Storm battery parks for ten years, trading their combined 300MW/1,200MWh on electricity markets.
Storm CEO Jan Caerts told VRT that in 2027 roughly one third of Belgian battery capacity will be located in Limburg province.
Also in Limburg is the Green Turtle project in Dilsen-Stokkem, which uses 640 Tesla Megapack 3 units for 2,800MWh — compared with 400MWh at Langerlo. Battery parks are being built on two former coal sites and a former zinc factory across Limburg and East Flanders.
From coal to flexibility
Langerlo burned coal and later biomass; a conversion to 100% biomass failed, the plant missed a Flemish subsidy of one billion euros and closed in 2017. The site was dismantled in 2021, leaving the grid connection, which is now reused for the battery park — a pattern repeated across Europe, where retired thermal plants offer exactly what batteries need most: a high-voltage connection.
The Langerlo batteries store electricity when supply is abundant and discharge it when demand rises, providing the flexibility a grid with increasing wind and solar generation requires.
Source: Tesla Magazine (teslant.com)
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