
February 13, 2026
7
Min reading

In this article, SirEnergies introduces you to PP1 and PP2 days, periods when the voltage in the electrical system is too high and when the capacity mechanism makes it possible to secure the supply of electricity to the network.
After a simplified but relevant explanation of the capacity mechanism, the following will be discussed: the calendar of PP1 and PP2 days, the method for defining these days and what they correspond to. You will thus understand the interest for users of the electrical network of reduce their consumption Or of participate in the deletions during these peak periods.
Originally, The capacity mechanism is a device that was created to offer additional remuneration to ultra-advanced power plants, the same ones that provide the security of electricity supply during peak periods. This mechanism therefore contributes greatly to The balance between the power drawn by consumers and the power injected by producers and erasure aggregators during episodes of high stress on the electrical system.
The capacity mechanism was put in place by the NOME law, following the report of the Champsaur Commission of 24 April 2009 which highlighted A risk of blackout in France during winter consumption peaks. Indeed, in 1999, during The opening of the electricity market For major manufacturers, only an energy market has been created.
This market, called “energy only” (EPEX Spot and Nord Pool Spot), only pays for the MWh produced by the power plants. In fact, state-of-the-art power plants that operate only a few dozen hours per year are not sufficiently paid by this market alone. This lack of remuneration has hampered investments, which has led to the erosion of extreme means of production.
To remedy this, the Champsaur Commission proposed in its report the creation of a capacity mechanism requiring all users who draw electricity from the network, the actors obliged, to reserve production or disposal capacity each year, during peak hours; this reservation being made in the form of the acquisition of capacity guarantees valid for one year.
Obligatory actors mean electricity suppliers, network operators and final electricity consumers who do not obtain all or part of their consumption from a supplier.
This mechanism, which makes it possible to pay for extreme production capacities, also offers remuneration to electrical erasure capabilities. Indeed, encouraging certain users of the electrical network to stop drawing electricity from the network, i.e. to erase their consumption from the network, either by reducing it or by producing their own electricity, has exactly the same effect as asking producers to inject more electricity into the network.
From a regulatory point of view, the capacity mechanism is codified by the articles L335-1 and following and R335-1 and following of the Energy Code. It imposes on obliged actors an obligation to have capacity guarantees in line with their anticipated energy consumption during peak days, known as PP1 days.
These capacity guarantees are exchanged, for each year of delivery, on a capacity market, EPEX Capacity, between the obligated actors on the one hand and the producers and operators of erasure on the other hand. They are required to certify their production or disposal capacity in advance for each year of delivery.
Concretely, for the obligated actor, the capacity mechanism results in the payment of a power reservation in the form of capacity guarantees proportional to the power it draws during the peak periods. Depending on whether or not he uses the services of a supplier, the obligated actor will find this amount on his electricity bill or will have to buy guarantees on the market. EPEX Capacity.
PP stands for Peak Period. The days PP1 and PP2 are therefore by definition the days of peak periods of electricity consumption.
PP1 days are the days during which the average withdrawal power of each obligated actor will be measured by RTE to establish the level of obligation, and therefore the number of guarantees that it must hold.
PP2 days are the days during which erasure producers and aggregators, who have had their capacities certified by RTE, must keep them available to activate them upon request from RTE.
Every year, RTE can report 15 days PP1, which are also PP2, and 10 additional days that are only PP2. These 25 days are reported The day before for the next day, at 9:30am for PP1-PP2 days, and at 7:00pm for PP2 days only (PP2 non-PP1 days).
These days PP1 and PP2 must respect a schedule : working days from January to March and from November to December, excluding the Christmas school vacation period.
To implement an optimal policy for choosing PP1-PP2 days and PP2 days only (not PP1), the method implemented by RTE is based on two criteria:
For the consumption criterion, the model developed by RTE uses an algorithm of inventory management in an uncertain universe that is based on use values calculated using the Bellman equation.
This algorithm is calibrated beforehand with the consumption and temperature histories. The model is then fed daily by the Météo-France forecasts for the next day, which makes it possible to execute the algorithm and calculate the consumption estimates for the following day and to deduct the risks of voltage on the electrical system. The objective for RTE is to select the days for which national consumption is highest during peak hours (7 am to 3 pm and 6 pm to 8 pm).
RTE is particularly vigilant during cold waves. Indeed, during these events, which generally occur from November to March, the temperature falls by 5°C compared to seasonal norms and can impact several regions or even the whole country for at least 3 days.
Knowing that in France, a temperature drop of 1°C in winter requires 2,400 MW of additional production; more than 12 GW are needed to deal with a cold spell in France, or 10% of the total installed production fleet.
The establishment of the PP1 and PP2 days, and the underlying capacity mechanism, made it possible to respond in particular to two demands of alternative suppliers and to bring up to date two devices formerly implemented in regulated sales tariffs (TRV), namely:
The PP1 and PP2 days reflect the logic of EJPs, namely: a financial incentive to extract less during peak days, EJP days that are reported the day before for the next day and counted in a monitoring calendar for the 22 EJP days; information available on the site From EDF :
The PP1 and PP2 days were set up like the EJP days in order to allow all users and producers to coordinate their efforts to strengthening the security of the electrical system and the supply of consumers.
To implement this coordination, RTE publishes PP1 and PP2 days on its service portal on a daily basis, in accordance with the principles described above, as well as Their histories.
In order to help you reduce your electricity bills, we have set up an API in order to be able to retrieve the report of the PP1 and PP2 days directly and in real time.
👇 Click on the link below to view PP1 and PP2 days for free. Consult the PP1 and PP2 peak days
If you also want to reduce your bill, do not hesitate to contact us in order to support you in this process of controlling electricity consumption.

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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.
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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.
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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.
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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.
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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.
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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).
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Non. L'IA traite la donnée (data processing), mais l'analyste apporte la compréhension du contexte (market sentiment) et la prise de décision stratégique.
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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.
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Chaque modèle d'IA répond à un besoin spécifique du cycle d'achat :
L'expertise humaine reste néanmoins indispensable.
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Parce que la puissance souscrite en kVA détermine le prix de l'abonnement et que tout dépassement peut entraîner des surcoûts importants.
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La réussite d'un projet collectif énergie repose sur trois piliers fondamentaux :
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La fin de l'ARENH (Accès Régulé à l'Électricité Nucléaire Historique) marque l'arrêt de la fourniture d'électricité à prix fixe garanti (42 €/MWh).
Dès le 1er janvier 2026, les entreprises sont exposées aux prix de marché, mais deux nouveaux mécanismes de régulation prennent le relais, bien que leur logique soit différente :
Conseil stratégique : Ne comptez pas sur le VNU pour réduire votre facture en 2026 si les marchés restent stables. Auditez vos contrats dès maintenant pour intégrer une part de prix fixe ou explorer des "Power Purchase Agreements" (PPA) pour sécuriser vos coûts sur le long terme.
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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.
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Car les marchés dépendent de facteurs exogènes imprévisibles (géopolitique, météo soudaine, politique) que les modèles basés sur l'historique ne peuvent pas anticiper, tout comme on ne prédit pas le Loto.
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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.
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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.
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Absolument. La réforme des heures creuses vise à absorber la surproduction solaire en milieu de journée. Les créneaux d'heures creuses se déplacent progressivement vers la plage 11h00 – 17h00, notamment en été. C'est une opportunité majeure pour les sites industriels ou tertiaires capables de flexibilité.
Conseil stratégique :
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Ce seuil est jugé élevé par rapport aux prévisions actuelles du marché. Si le prix de l'électricité reste en dessous de 78 €/MWh, les entreprises ne bénéficieront d'aucune redistribution. Cela signifie que la protection promise par la réforme pourrait être inexistante dans un marché baissier, d'où l'importance de stratégies de sourcing agiles et d'outils de monitoring comme Pilott.
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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.
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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.
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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.
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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.
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La Vente de Nucléaire Universelle (VNU) est le nouveau mécanisme de régulation des prix de l'électricité en France. Contrairement à l'ARENH, il ne s'agit plus d'un volume fixe à prix réduit, mais d'une redistribution financière des revenus excédentaires d'EDF aux consommateurs, basée sur les prix de marché et les coûts de production du nucléaire historique.
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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.
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Le prix Forward est fixé à l'avance (sécurité budgétaire), tandis que le prix Spot varie heure par heure selon le marché (opportunité mais risque élevé).
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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.
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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.
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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.
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The €/MWh is a price unit used in wholesale markets, while kWh is the unit visible on your bills.
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Ce record de 92,3 TWh s'explique par la conjonction de trois facteurs :
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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.
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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.
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C'est l'indicateur d'efficacité d'un appareil électrique ; il représente le ratio entre la puissance active (utile) et la puissance apparente (totale).
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En 2025, la France a atteint un solde exportateur net de 92,3 TWh, battant le précédent record de 2024 (89 TWh).
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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.
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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.
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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.
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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.
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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.
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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).
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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.
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This makes it possible to choose the right time to contract, secure your budgets and anticipate increases.
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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.
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L'impact dépendra des prix de marché. Le mécanisme prévoit une redistribution si les prix dépassent 78 €/MWh. Cependant, si les cours restent bas (actuellement autour de 60 €/MWh), le dispositif ne s'activera pas. La facture sera alors indexée à 100% sur les prix de marché, rendant le choix du fournisseur et du moment d'achat critiques.
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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 :
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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.

