Engie and electrical-equipment group Legrand have signed what they describe as France’s first renewable electricity supply agreement based on hourly matching. The distinction matters. Most corporate green-power contracts reconcile renewable generation and consumption over a year. The new arrangement is designed to show, hour by hour, how much of Legrand’s demand is matched by renewable output.
The contract covers Legrand’s operations in France from 2029 through 2031. Engie’s announcement says the companies are targeting an hourly matching rate of at least 70%. That is not a promise that every site will run on renewable electrons in every hour. Electricity from all sources mixes on the grid. It is instead a more precise accounting and procurement framework that compares metered consumption with renewable production during the same hour.
Why annual matching is no longer enough
Under conventional certificate systems, a company can buy enough renewable attributes to cover its annual electricity use even if its factories consume heavily on winter evenings while the associated solar plants generate at midday in summer. The annual totals balance, but the timing does not. As wind and solar occupy a larger share of power systems, that temporal gap becomes commercially and environmentally important.
Hourly matching forces buyer and supplier to confront the shape of demand. A factory with stable round-the-clock consumption needs a different portfolio from an office whose load peaks during daylight. The supplier may combine wind, solar, hydro or other renewable production, then use forecasting, demand flexibility and storage to improve the match. The result is a clearer view of the hours that remain difficult to decarbonise.
That makes the Engie-Legrand agreement a test of data as much as energy. Metering must be sufficiently granular, production assets must be traceable and both sides need systems capable of reconciling thousands of hourly intervals. The agreement therefore fits Legrand’s own market, which includes products and systems used to manage electrical and digital infrastructure.
A 70% target is more informative than a 100% slogan
The stated minimum of 70% may sound less impressive than a broad claim of 100% renewable electricity. In practice, it can be more credible. Reaching the final portion of hourly coverage is difficult and can be expensive because renewable output varies, while batteries shift energy only across limited periods. Seasonal shortages cannot be solved by a few hours of storage.
By publishing an hourly target below 100%, the companies acknowledge the engineering constraint rather than hiding it inside annual averages. Progress can also be measured. If unmatched hours cluster in particular seasons or times of day, Engie can alter the generating portfolio, add flexibility or explore longer-duration storage. Legrand can change operating schedules where that makes industrial sense.
The agreement is not a complete carbon-accounting solution. France’s power system already has a relatively low carbon intensity because nuclear generation supplies much of its electricity. Renewable matching and avoided emissions are not identical measures. An hourly renewable contract may improve traceability without producing the same emissions benefit in every interval. Buyers should therefore report both contractual matching and the actual carbon intensity of consumed power where reliable data exist.
What the deal changes for corporate procurement
For Engie, the contract turns energy supply into a higher-value service. Suppliers can differentiate themselves through portfolio design, forecasting and auditable data rather than competing only on price and annual certificates. If customers adopt similar requirements, renewable developers may also gain better demand signals for projects whose production profiles complement existing supply.
For Legrand, the immediate benefit is more defensible reporting. Corporate climate claims face growing scrutiny from investors, customers and regulators. Hourly records provide stronger evidence than a yearly volume alone. They can also reveal operational opportunities, such as shifting flexible processes toward periods of abundant renewable output.
There are costs. More granular procurement demands better data, contract administration and risk management. A three-year supply period is useful for testing the model, but shorter than many long-term power purchase agreements used to finance new generating assets. The environmental value will depend partly on which projects support the supply and whether the arrangement contributes to additional renewable capacity.
The importance of the agreement is therefore not that it solves continuous clean power for French industry. It creates a practical benchmark. If Engie can deliver the promised matching reliably and Legrand can use the information to adjust demand, other industrial buyers will have a model to examine. If the exercise remains mainly a reporting layer, its influence will be narrower.
France’s first-mover label will matter only if hourly procurement spreads. The real outcome to watch from 2029 is not the press release, but the distribution of unmatched hours, the technologies used to close them and the price premium customers accept for better proof.
