Glossary

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Subscription

Fixed part of the bill, which pays for the provision of energy, even if you do not consume.

Budget

Energy market

Consumption & sustainability

Summer hours

Period during which the electricity rate is the cheapest, for customers whose contract has a time differentiation (all meters in BTSUP and HT, and...

Electricity

Markets & purchases

Sunshine

Quantity of solar energy received on a given surface during a given period of time.

Green energy

Actors & regulations

Supply-Demand Balance

Situation where electricity consumption is equal to available production.

Electricity

Consumption & sustainability

Sustainable development

Model that combines economic performance, social justice and environmental protection.

Environment

Green energy

Actors & regulations

Synchronous system

Interconnected electrical network operating at the same frequency.

Electricity

Consumption & sustainability

System services

Essential services to ensure the stability and quality of electricity on the network.

Electricity

Markets & purchases

T1

Small power high-voltage customer — companies or sites connected to high voltage with limited subscribed power (often SMEs/ETIs in...

Electricity

Production & resources

T2

Medium power high voltage customer — consumers connected to high voltage, requiring higher power than t1 (production sites...

Gaz

Consumption & sustainability

T4

Very high voltage customer — industrial sites or strategic infrastructures connected directly to the electricity transmission network (RTE)...

Gaz

Actors & regulations

T5

Ultra high voltage customer — very large industrial sites requiring exceptional power supply, often directly to the core...

Electricity

Consumption & sustainability

Take or Pay

Contractual clause requiring professional customers to pay the minimum volume of energy agreed with their supplier, even if actual consumption is...

Energy market

Markets & purchases

Tarif

Delivery price structure (T1, T2, T3, T3, T4, TP) according to the profile and use of the site.

Gaz

Markets & purchases

Tertiary decree

Elan law decree (2019) requiring tertiary buildings (>1000 m²) to progressively reduce their energy consumption (40% in 2030, 50%...

Energy market

Actors & regulations

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The answers to your questions

How is the glossary organized?

The terms are listed in alphabetical order and can be filtered by category (Budget, Energy Market, Green Energy, etc.).

How does the glossary help me with my decisions?

It makes it possible to understand market mechanisms, to anticipate costs and to better understand the energy players

Is the glossary updated regularly?

Yes, it is continuously enriched according to regulatory and market developments, to remain a reliable reference.

Where can I find the definition of an unknown acronym?

All the regulatory acronyms or techniques (e.g. 3RErN, PDL, ARENH) are explained in the glossary with their context.

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.

Is the glossary linked to the articles on the site?

Yes, each definition can be linked to educational articles or current events to deepen the subject.

Can I filter only tax-related terms?

Yes, just select the filter Budget to display concepts like TICFE, TICGN, or CTA.

What is the Sirenergies glossary for?

The glossary explains key energy terms, like €/MWh, TURPE or TICFE. It makes it easier to read invoices and understand markets.