SSE has installed 100,000 smart meters in properties across the UK.
The Big Six company said it has a target of installing seven million smart meters in the next few years.
The technology gives consumers information on how much gas and electricity they are using, providing real-time information to suppliers.
Sara Jane Asquith, Director of Metering and Smart Transformation said: “The smart meter roll-out is a major and transformative investment in the energy infrastructure of the UK. Smart meters will give customers greater control of their energy consumption by enabling them to see at a glance how much they use and what it is costing.”
According to Smart Energy GB, smart meters have helped three quarters of customers understand their energy bills.