The move is part of the firm's shift to offer its business customers more flexibility with their energy bills - with a particular focus on improving each consumers energy efficiency.
The change in strategy will mean new business customers will not be offered an auto-rollover form of contract from April 2014, it will also end such auto-rollovers for its current business customers from November 2014.
RWE npower CEO, Paul Massara, said: "Our business customers have told us that they want choice and control over their energy supply. We've taken that feedback on board, and made the decision to end default auto-rollover contracts and instead offer real choice to businesses."
Currently, any customer who does not get in touch with npower when their energy bill is due for renewal is rolled on to a new fixed term contract. However, it currently only rolls over small businesses for a maximum of 12 months.
With this shift in focus though, the firm is set to offer fixed and variable contracts as part of its new approach to selling and renewing business contracts.
Mr Massara added: "I want to make sure that customers have a positive experience and get value for money for their energy contracts. The move to end default auto-rollover contracts should be considered alongside other changes going on in the market.
"It's vital that suppliers, brokers and Ofgem work together to adopt a measured and controlled approach to implementing this across the market.
"Although npower is one of the first suppliers to make this commitment, our announcement today allows sufficient time for the introduction of a new, regulated code of practice for energy brokers which is needed to prevent confusion in the marketplace."
While many of the 'Big Six' are already participating in the government's Green Deal initiative, RWE npower is set to join the scheme at some point in the summer.
The initiative offers domestic and business energy consumers ways to improve their property's energy efficiency, including the fitting and installation of wall insulation and in some instances the upgrading of an old boiler to a more energy efficient model.
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