Key figures



938 708

delivered onsite


Delivery Points


WattsOn is an application for energy supply contract management i.e. bilateral agreements that manage the delivery of energy to customers’ sites.

WattsOn computes all the data of your energy supply agreements (invoice, consumptions and forecast, and contracts) to bring you: 

  • A seamless and high-end experience
  • Risk management dedicated to energy supply

WattsOn assists you throughout the life cycle of your contract.

How it works

The Wall, a collaborative inbox 

  • Use this collaborative messaging tool for team conversations
  • Chat privately with one person
  • Establish communication channels ("themes") to interact with several colleagues simultaneously

The Focus Tool 

  • Closely manage your sites and delivery points with this tool
  • Select and identify one or more sites you are interested in
  • The Focus Tool intuitively filters all other tools (invoices, Wall, consumption)

Manage your energy consumption  

  • Consult your volumes in 2 clicks, once you’ve selected your site in the Focus Tool
  • Get a daily overview for your selected site

Invoice management  

  • Simplify your accounting
  • View your detailed billing data
  • Upload your bills and see your history

Day-to-day Management 

  • Monitor your sites daily, using a task system.
  • Enjoy real-time progress
  • Assign a task to your colleagues
  • Manage your account and complete your information on a daily basis


ENGIE offers

  • WattsOn helps large customers fine tune their energy contract, with a large portfolio of automated processes (invoicing, forecasting, and price risk management). Customers can access all customizable features through a web portal to get a quick overview or detailed information on consumptions, bills or contract managements.

  • WattsOn offers a dedicated space for the different business actors responsible for price and volume risk management, guaranteeing customers the most attractive supply price possible and simplifying contract management down to invoicing. In parallel, only “full supply” specificities are managed through WattsOn, all market risks are covered by trading responsibilities.

  • WattsOn offers a seamless experience to all its customers and internal users, regardless of their location (now France and Czech Republic, and in the future Belgium, Holland, Italy, Spain and Germany) and products.

  • WattsOn is developed on a solid foundation with reliable data. It is a scalable tool that aligns with your needs.
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