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The BBC has learned that government spending regulators will review plans for millions of British households to install smart meters.
The National Audit Office said it would investigate whether the planned 11bn would save customers money.
The Ministry of Commerce, Energy And Industry Strategy said it would work with NAO to "help review progress on this important project ".
Smart meters display energy and costs in real time.
The technology is expected to save £ 16.
7bn by reducing energy use, the cost of the program is funded through the Energy Act.
Meter readings are sent back to the supplier and promise to pay for energy based on accurate use rather than estimation.
However, some users have encountered problems with the installation, inaccurate billing, or the loss of the meter's "smart" function when replacing suppliers.
The National Audit Office now said it would review the project.
Its research will "evaluate the current economic case of smart meter launch and look at whether the government is expected to achieve the goal of meter launch by 2020 ".
Members of Congress questioned the government's plan to install the deadline for 53 million smart meters by 2020, eight of them.
6 million has been installed so far.
IT systems that allow meters to communicate with suppliers, data communication companies (DCC)
Although it will go online on 2015, it has not yet been launched.
The industry body responsible for promoting smart meters, "Smart Energy GB", defended the pace of the launch.
Its chief executive, Safa Deshmukh, told BBC Radio 4, "you and your show," eight out of 10 people using smart meters "are very happy with the meter and will
The Ministry of Commerce, Energy and Industrial Strategy also defended the plans.
A spokesman said: "Smart meters are an important upgrade to bring our energy infrastructure into the 21 st century.
"The National Audit Office is expected to publish its report during the 2018 summer.
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