Summarize with AI
Off-peak hours reform: what are the impacts for your business?
Mis à jour le
November 20, 2025
6
Min reading
It is a small revolution in the world of energy: after 60 years of existence, the off-peak system evolves from the 1Er November 2025.
Introduced as part of the TURP 7, this reform responds to the new challenges of the electrical system, which has been disrupted by the rise of renewable energies and the evolution of uses.
Between new time slots and seasonality, this reform is reshuffling the cards and opening up new opportunities for businesses.
Presented by the Energy Regulatory Commission (CRE), this reform was widely welcomed by energy players.
But in concrete terms, what will it change for your business?
And above all, how can you use it as a lever to sustainably reduce your electricity bill?
Off-peak hours/Full hours: the founding principles
Electricity cannot be stored.
The slightest imbalance between consumption and production weakens the network and prices.
Off-peak hours (HC) and peak hours (HP) meet this need for balance.
Off peak hours/Full hours: back to the origins
The off-peak hours (HC) and peak hours (HP) system coincided with the commissioning of the first nuclear power plants in the 1960s.
The objective?
Better balance the electrical system by limiting consumption peaks.
To achieve this, a incentive rate is set up. It encourages consumers to shift some of their electricity consumption to hours when demand is low.
Concretely, 8 off-peak hours are defined every day, backed by a reduced price per kWh. These time slots are generally positioned at night, between 22 p.m. and 6 a.m., and covered by nuclear production.
Are off-peak and peak hours accessible to businesses?
Businesses can benefit from differentiated pricing for off-peak hours and peak hours.
However, the system varies according to the power purchased:
- If the subscribed power is less than or equal to 36 kVA, businesses can take advantage of the HP/HC option, such as individuals.
- If the power is greater than 36 kVA, businesses can take out a contract offering seasonal rates, broken down into four main items (peak hours high season, off-peak season, peak hours low season, peak hours low season, peak hours low season).
Who sets the off-peak hours?
It is Enedis Who has control over the off-peak hours.
For each consumer, the network operator sets the time slots “depending on the operating conditions and the local capacity of the public distribution network”.
So it is Unable to change the time range offered by the electricity supplier in the HP/HC option.
What does the off-peak hours reform change from 2025?
From the 1Er November 2025, the peak hours and off-peak hours (HP/HC) system is changing profoundly.
Why reform the HP/HC system?
For over 60 years, off-peak hours and peak hours have been based on the same principle: balancing electricity consumption and production in real time.
However, today, The offer is changing.
Renewable energies — and in particular solar electricity - produce at full capacity during the day.
These production peaks destabilize the network and markets, generating negative prices.
Faced with the necessary energy transition and decarbonization process, Slowing down the development of renewable energies is not an option.
The reform therefore seeks to restore the balance of supply and demand during the day, by reorienting consumption towards the hours when The Sun is at its zenith. Connected and programmable devices facilitate this change of use.
The principles of the new off-peak/peak hours periods
The reform profoundly changes the system of off-peak and peak hours. Only one principle remains: maintaining the number of off-peak hours at 8.
The new off-peak hours are set according to the following principles:
- A minimum of 5 consecutive off-peak hours at night, between 11 p.m. and 7 a.m.
- An increase in the number of off-peak hours during the day, with a maximum of 3 off-peak hours in the afternoon between 11 am and 5 pm.
- A possibility of differentiating off-peak hours according to the seasons to adapt consumption to renewable electricity production: summer, from 1Er April to October 31, off-peak hours will be placed primarily during the day, while in winter, from 1Er November to March 31, the night period will be preferred.
- The exclusion of the off-peak hours system from certain time slots Under voltage, for example in the morning between 7 am and 11 am and in the evening between 5 pm and 9 pm (slots vary according to the season).
Off-peak hours remain determined by the network operator Enedis.
According to the consumption profiles And the local constraints on the electrical network, customers may be offered off-peak hours only at night, with or without seasonality, or a distribution of off-peak hours at night and during the day, with or without seasonality.
A gradual introduction of new off-peak hours
If the reform comes into force on 1Er November 2025, its implementation is progressive until the end of 2027 in order to allow the adaptation of each electricity meter.
Enedis will inform electricity suppliers of the possibilities of HP/HC options six months before they are applied. They will have to transmit the information to their customers at least one month before the change.
How can you take advantage of off-peak hours to reduce your electricity bill?
The majority of businesses consume the majority of their electricity during the day.
The shift from off-peak hours in the afternoon is an opportunity to seize to save on your energy bill.
A single principle: shift your electricity consumption to off-peak hours
The kWh rate during off-peak hours costs less than during peak hours. Even if the price of the HP/HC subscription is slightly higher, consuming during these time slots is still advantageous.
Reducing your electricity bill requires adapting your consumption habits by Shifting energy-intensive uses to off-peak hours : industrial production processes, electricity-intensive equipment (electric oven, air compressor, etc.), electric vehicle charging, heating and air conditioning, hot water production by a heat pump, etc.
These uses can be programmed intelligently using connected and automated devices And of a System of centralized energy management.
La team training is one of the keys to integrating these practices on a daily basis.
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To note: The programming of uses must be adapted according to the seasonality of off-peak hours, which can add complexity to the exercise...
An essential prerequisite: know your energy consumption well
To optimize your energy consumption and take full advantage of off-peak hours, you need to know exactly When, how and where do you use electricity.
The Diagnosis of your consumption makes it possible to identify the most energy-consuming processes, to identify consumption peaks during the day and to understand the operating cycles of your equipment.
To conduct this analysis, you can rely on various sources: your consumption data, supervisory tools or a energy audit.
Thanks to these elements, you can then prioritize your uses, determine the consumption that can be moved during off-peak hours without disturbing the activity and programming the differences.
With the Sirenergies Pilott app
Take control of your electricity consumption and take full advantage of the off-peak hours.
Thanks to our platform:
- Follow your consumption on D+1
- Analyze their evolution over time
- Spot your demand peaks in order to shift them to off-peak hours, without disrupting your business.
To conclude...
By readjusting the off-peak hours, the reform meets the major challenges of France's new energy landscape: rebalancing electricity supply and demand, ensuring the stability of the network and supporting the transition to a more low-carbon energy model.
For businesses, the new off-peak hours open up new leeway. Future niches allow more flexibility in electrical uses with, as a result, financial savings.
If the reform is gradually implemented, you can prepare for it today by analysing your electricity consumption and identifying alternative uses. At Sirenergies, it's our job. Do you want to know how the new off-peak hours can help you optimize your electricity bill?
Take the first step towards optimization
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The answers to your questions
What are the advantages of sourcing?
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Sourcing offers better visibility on the market and promotes the selection of competitive contracts. It helps to reduce the risks associated with price volatility and to optimize the energy budget.
How do I get a tax exemption?
Some businesses may obtain a partial or total exemption from the TICFE or the TICGN, depending on their activity and energy intensity. The support of an expert makes it possible to identify the eligibility criteria and to put together the file.
Comment l'eau est-elle transformée en électricité ?
Le processus repose sur l'utilisation de la force de l'eau (énergie cinétique) issue des courants, des chutes d'eau ou des dénivelés. Le fonctionnement suit trois étapes clés :
- Le barrage retient l'eau et l'oriente vers des conduites.
- La pression de l'eau fait tourner une turbine, créant de l'énergie mécanique.
- Une génératrice (alternateur) transforme cette énergie mécanique en électricité, laquelle est ensuite adaptée par un transformateur pour le réseau
What are the concrete benefits for tertiary companies?
Les profits include a direct reduction in bills, strengthened budgetary forecasting and better control of consumption. Businesses gain visibility and efficiency thanks to adapted tools.
Qu'est-ce qui remplace l'ARENH depuis le 1er janvier 2026 ?
Le dispositif ARENH a laissé place au VNU (Versement Nucléaire Universel).
Ce changement structurel expose davantage les entreprises aux prix de gros, rendant la gestion des risques plus complexe qu'auparavant.
Il devient alors indispensable de définir une stratégie d'achat d'électricité avec Sirenergies pour lisser l'impact de la volatilité des marchés sur votre budget.
Quel est l'impact de ces exportations sur le prix de l'électricité pour les entreprises ?
L'abondance de production française tire les prix du marché de gros vers le bas.
En vertu du mécanisme de l'Ordre de Mérite (Merit Order), les centrales les moins coûteuses (nucléaire, renouvelables) couvrent la demande plus souvent, évinçant les centrales à gaz ou charbon plus onéreuses.
Cela multiplie les épisodes de prix bas, voire négatifs, sur le marché spot.
Is Bellenergie Business electricity really green?
Yes. The supplier guarantees an offer 100% renewable via the official Guarantees of Origin (GO) mechanism.
For the most demanding companies, the offer GREENVOLT+ ensures very low carbon intensity electricity, sourced exclusively from independent French producers (hydraulic, wind, solar).
Quelle est la différence concrète entre le transport et la distribution d'électricité ?
Le transport (RTE) correspond aux "autoroutes" de l’électricité. Il s’agit de transporter de très grandes quantités d'énergie sur de longues distances, depuis les centrales de production (nucléaires, barrages, parcs éoliens offshore) vers les régions de consommation.
La distribution (Enedis) s'apparente aux "routes départementales" et aux rues. Elle récupère l'électricité à la sortie du réseau de transport pour la livrer directement chez le client final, en abaissant la tension pour qu'elle soit utilisable par vos appareils.
Pourquoi la France a-t-elle exporté un volume record d'électricité en 2025 ?
Ce record de 92,3 TWh s'explique par la conjonction de trois facteurs :
- Le redressement du parc nucléaire : Après les problèmes de corrosion sous contrainte de 2022, la production nucléaire a retrouvé une forte disponibilité (373 TWh).
- L'essor des renouvelables : Une capacité installée en hausse (solaire et éolien) et une production hydraulique solide.
- Une consommation intérieure atone : La demande française reste inférieure de 6 % à la moyenne historique, créant un surplus massif disponible pour nos voisins.
How to optimize taxes and contributions?
Tertiary companies are concerned by taxes such as TICFE or TICGN. Sirenergies checks the accuracy of invoices, identifies possible exemptions, and helps correct errors to sustainably reduce costs.
Quand faut-il renégocier son contrat d'électricité professionnel pour 2026 ?
Idéalement entre 6 et 12 mois avant l'échéance, de préférence au printemps ou au début de l'été lorsque la demande est plus faible.
Pourquoi mon contrat est-il en kVA et ma consommation en kWh ?
Le kVA mesure la capacité maximale que votre compteur peut supporter à un instant T, tandis que le kWh mesure la quantité d'énergie consommée sur une durée.
Which taxes are particularly relevant for farms?
Farms are subject to taxes such as TICFE or TICGN. Sirenergies verifies their application, identifies cases of exemption and accompanies the procedures to reduce the tax burden.
What is the difference between €/MWh and kWh?
The €/MWh is a price unit used in wholesale markets, while kWh is the unit visible on your bills.
Comment mobiliser les collaborateurs autour d'un projet de sobriété énergétique ?
La réussite d'un projet collectif énergie repose sur trois piliers fondamentaux :
- La visibilité : On ne gère bien que ce que l'on mesure. Partager les données de consommation via des outils comme l'application Pilott donne un sens concret aux efforts fournis.
- L'incarnation : Nommer des ambassadeurs énergie internes permet de diffuser les bonnes pratiques par l'exemple et de lever les freins opérationnels propres à chaque métier.
- La gamification : Transformer la contrainte en défi (challenges inter-services, concours de l'équipe la plus sobre) crée une dynamique positive et renforce la cohésion d'équipe autour des enjeux RSE.
What is the point of following Spot & Forward prices?
This makes it possible to choose the right time to contract, secure your budgets and anticipate increases.
Why launch an energy tender?
Un appel d’offres permet de mettre en concurrence plusieurs fournisseurs d’électricité et de gaz afin d’obtenir des conditions contractuelles optimisées. C’est une démarche transparente qui permet de choisir l’offre la plus adaptée aux besoins budgétaires et techniques de l’organisation.
How to properly define your subscribed power?
The subscribed power must be calculated according to the consumption profile and uses (heating, industrial processes, tertiary equipment). One fine analysis makes it possible to ensure the adequacy between real need and contract.
Quel est l'impact réel de la rénovation de l'éclairage public ?
C'est le levier le plus rapide pour obtenir des résultats visibles. L'éclairage représente environ 40 % de la consommation d'électricité d'une commune.
Passer au LED avec pilotage intelligent permet de réduire la facture de 50 à 80 %, avec un retour sur investissement (ROI) rapide, souvent estimé à 2 ou 3 ans.
Quel est le nouveau record 2025 d'exportation d'électricité de la France ?
En 2025, la France a atteint un solde exportateur net de 92,3 TWh, battant le précédent record de 2024 (89 TWh).
Comment réduire la puissance souscrite de son compteur ?
En analysant votre courbe de charge pour identifier la puissance réelle appelée, puis en demandant un ajustement à votre fournisseur ou via un expert en énergie.
Why change energy suppliers?
Changing suppliers can allow you to benefit from more competitive prices, adapted services or better contractual conditions. Thanks to sourcing, change is happening without interruption of supply.
What taxes are particularly relevant to manufacturers?
The industry is concerned by TICFE, TICGN and other contributions that may represent an important part of invoices. Sirenergies identifies cases of exemption and accompanies the procedures to benefit from them.
What are the main taxes applicable?
Among the taxes include TICFE, TICGN, CTA, CJA and TURPE. They represent a significant part of the bill and vary according to consumption profiles. Understanding them well is essential to optimize costs.
How to optimize the taxes and contributions of a community?
Communities are subject to taxes such as TICFE or TICGN. Sirenergies analyzes invoices, identifies exemption possibilities and fixes possible errors to reduce the tax burden.
Qu'est-ce que le cosinus phi
C'est l'indicateur d'efficacité d'un appareil électrique ; il représente le ratio entre la puissance active (utile) et la puissance apparente (totale).
What are the consequences of overpowering?
Exceeding capacity leads to financial penalties and can impact the size of the contract. Adjust the correctly subscribed power makes it possible to avoid these additional costs.
What are the PP1 and PP2 alert days?
These are signals sent by RTE during periods of tension on the electrical network. The Sirenergies tool informs you in real time to anticipate your uses.
Pourquoi l'humain est-il le premier levier de la performance énergétique ?
Même le bâtiment le plus moderne et le mieux isolé perd son efficacité si ses usages sont inadaptés. La technologie et les normes ne suffisent pas : la transition énergétique est avant tout une transformation humaine.
Derrière chaque kilowattheure consommé se cache une habitude.
Un collaborateur sensibilisé comprend qu'ouvrir une fenêtre alors que le chauffage est allumé ou laisser un ordinateur en veille consomme de l'énergie inutilement. En replaçant l'humain au centre de la stratégie de gestion de l'énergie, l'entreprise s'assure que ses équipements performants sont utilisés de manière optimale, garantissant ainsi une rentabilité durable et un impact environnemental réduit.
Qu'est-ce qui remplace l'ARENH en 2026 pour les entreprises ?
L'ARENH est remplacé par le VNU (Versement Nucléaire Universel), un mécanisme de redistribution des revenus excédentaires d'EDF en cas de prix très élevés, et par les CAPN, des contrats long terme pour les gros industriels.
Le prix de l'électricité va-t-il baisser en 2026 ?
Pas nécessairement sur votre facture finale. Si les prix de gros (le prix de l'énergie brute) ont baissé, les coûts d'acheminement (TURPE) et certaines taxes augmentent, compensant souvent la baisse de la part énergie.
Quelles sont les nouvelles obligations pour le Décret Tertiaire et l'Audit Énergétique ?
Le calendrier 2026 impose deux échéances majeures :
- la déclaration des consommations 2025 sur la plateforme OPERAT avant le 30 septembre
- la réalisation d'un audit énergétique avant le 11 octobre pour toutes les entreprises consommant plus de 2,75 GWh/an.
Pour simplifier ces démarches, vous pouvez centraliser vos données de consommation avec la plateforme Pilott de Sirenergies, garantissant ainsi la conformité de vos rapports réglementaires.
How do I read an electricity or gas bill?
One invoice consists of several elements: consumption, supplier share, taxes and contributions. The analysis of each line makes it possible to identify possible errors and to check the consistency with the signed contract.
What are the customer reviews on bellenergie Business's customer service?
In 2025, the supplier had a NPS (Net Promoter Score) of +16 and a note of 4,17/5.
Satisfaction is based on a “zero solicitation” model and 100% in-house customer service in Toulon, guaranteeing proximity and responsiveness that cannot be found with major historical suppliers.
Comment réduire ma facture si les prix du marché sont volatils ?
En 2026, les principaux leviers sont : la renégociation de votre contrat de fourniture au bon moment, l'optimisation de votre tarif d'acheminement (TURPE), la vérification de votre éligibilité aux taux réduits de taxes (Accise), et la réduction de votre consommation (efficacité énergétique, autoconsommation).
Comment financer les travaux communaux sans augmenter la taxe foncière ?
Plusieurs leviers existent pour préserver la fiscalité locale :
- Les CEE (Certificats d’Économie d’Énergie) : Un financement privé majeur pour l'efficacité énergétique.
- L'optimisation de l'achat d'énergie : Choisir des contrats adaptés (prix fixes, indexés ou groupés) pour dégager des marges de manœuvre dès la première année.
- Les aides publiques : Mobiliser le Fonds Vert, le FEDER ou le Fonds Chaleur.
What are the electricity offers offered by bellenergie Business?
The range E @sy is available in four pricing structures to adapt to each risk profile:
- E @sy Fixed: 100% budget visibility without variation.
- E @sy Click: Smoothed price thanks to staggered purchases on the markets.
- E @sy Block + Spot: A mix between a secure base and a portion indexed to daily prices.
- E @sy Sport: A 100% dynamic offer to take advantage of downside opportunities in real time.
What are the energy challenges for manufacturers?
Industrial companies consume large volumes of energy for their production processes. They have to deal with the volatility of prizes, multi-site management and specific taxes. Controlling costs is essential to remain competitive.
What is energy sourcing?
Sourcing consists in identifying and analysing the offers of several electricity and gas suppliers. This approach makes it possible to obtain contracts adapted to the consumption profile and budgetary constraints of the company.
What are the challenges for tertiary companies?
Tertiary companies must manage their energy costs while guaranteeing the comfort of users (offices, shops, services). Consumption is often linked to heating, air conditioning and lighting, which requires precise monitoring to avoid budgetary excesses.
What are the energy challenges of the agricultural sector?
Farms must deal with high seasonal needs (greenhouse heating, irrigation, storage) and high volatility of prizes. Controlling these costs is essential to maintain profitability and secure the business.
L'hydroélectricité est-elle une énergie "propre" ?
Oui, elle est considérée comme une énergie renouvelable à faibles émissions de gaz à effet de serre.
De plus, l'eau ne subit aucune transformation chimique durant le cycle de production et réintègre son milieu naturel en aval.
Cependant, la construction de barrages nécessite des mesures pour protéger les écosystèmes (débit minimum, passes à poissons).
Pourquoi le kVA est-il crucial pour les entreprises ?
Parce que la puissance souscrite en kVA détermine le prix de l'abonnement et que tout dépassement peut entraîner des surcoûts importants.
Who can benefit from optimizing invoices and taxes?
All businesses, from SMEs to large organizations, can benefit from this service. Les local authorities also find it a lever to better control their budgets.
The answers to your questions
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