Data centres hide their power use as grid squeeze tightens

The finding comes from a year-long investigation by Lighthouse Report with Trouw and other European media, reported by NL Times on 30 September. The researchers invoked freedom of information laws across several European countries. They came away with nothing usable.

The Dutch numbers are the sharpest illustration. The Dutch Datacenter Association counted 186 commercial data centres with a capacity of 500 kW or more in the Netherlands at the end of last year. The Netherlands Enterprise Agency, known as RVO, collects the data for Brussels. It has records on only 104 of them. Public figures exist on the electricity usage of 44 centres and the water usage of 47, less than a quarter of the larger Dutch sites, according to NL Times. RVO told Trouw it holds more data on some centres but did not provide figures.

The European Energy Efficiency Directive obliges any data centre with an installed capacity of at least 500 kW to report energy and water consumption. The directive has been in effect for three years. In practice, few comply.

What is actually known

Some numbers do exist, and they are not small. Statistics Netherlands (CBS) puts Dutch data centre electricity use at 5.1 billion kilowatt-hours in 2024, which is 4.6 percent of national consumption and close to double the level five years earlier. Grid operator TenneT projects data centres will consume 10 to 15 percent of the country's electricity by 2030. RVO data released this summer showed Microsoft's largest data centre in the Netherlands alone accounts for 1 percent of national electricity consumption. Google runs two large Dutch data centres and does not disclose the figure.

Water is murkier still. Dutch data centres are estimated to account for about 0.1 percent of total consumption. That is small. The country has been through prolonged droughts and water shortages, which makes conservative use a live political question rather than a rounding error.

The disclosure gap matters because the Netherlands already has a grid capacity problem. Businesses, institutions and even housing developments sit on waiting lists for connections. Every undisclosed megawatt is a megawatt that planners, regulators and neighbours cannot see.

The supply side is racing ahead anyway

Microsoft Research published work on 30 September that points in the opposite direction from restraint: a machine learning pipeline that forecasts space weather risk across 66,935 substations in the continental United States. The system combines solar-wind observations and forecasts of the Auroral Electrojet and Disturbance Storm Time indices with local latitude, geology and ground conductivity. It produced location-specific risk estimates 30 to 60 minutes ahead of impact. During the evaluation period it detected nearly 80 percent of major space-weather events. The reference point is the May 2024 geomagnetic storm, when utilities across North America prepared for possible damage as auroras pushed far beyond their usual range.

That is the same grid that has to absorb electrification on the demand side. OilPrice ran a piece on 30 September asking whether the world can reach 35 percent electrification by 2035, a target tied to IRENA's call for grid investment to double to $1 trillion a year. CleanTechnica argued the same day that the United States risks finishing last among major markets. It noted the US stood at 5.9 percent battery-electric share in the first half of 2026 against 45 percent for China in August and 26 percent for Europe in July. Those are opinionated outlets, but the underlying shares come from the figures they cite.

Vehicle launches keep arriving regardless. WIRED reported on 29 September that the Range Rover Sport Electric starts at £109,810 with a 118.5 kWh battery and a claimed 374 miles on the WLTP standard. InsideEVs, covering the same launch, put WLTP range at 378 miles and confirmed the model is not coming to the United States as a 2027 model. The two outlets give different range numbers for the same vehicle. WLTP figures travel badly.

Hardware and workforce

Toyota, meanwhile, is selling an electric Hilux in the UK from £42,170 before VAT, with a 59.2 kWh battery, a WLTP range of up to 160 miles and 125 kW DC charging that takes 10 to 80 percent in about 30 minutes, according to Electrek on 30 September. The same report describes Toyota dropping a 1,675 lb caravan from 30 feet onto the truck's roof at Bentwaters airfield in Suffolk. It drove off. Tesla was granted a patent on 29 September for an "Electric Fan Car" using four ducted fans in the rear diffuser, Electrek reported, two weeks before a Roadster demonstration and five months after Model S and Model X production ended in April.

The workforce question is less photogenic. Asterisk Magazine published a long piece on 30 September arguing that the popular case for trades over college is weaker than its advocates suggest. It noted the average net paid price for public in-state tuition and fees was under $2,500 a year in 2024 and has been declining since 2016. Grid buildout needs electricians, and the pitch for them is being oversold.

What ties these threads together is measurement. A grid can only be planned against demand it can see. On the evidence published this week, a large share of the fastest-growing load in Europe is choosing not to be seen.