According to the latest figures, 57 per cent of all meters in Great Britain are now smart, although around 9 per cent – approximately three million – were not working as intended as of March this year, the NAO said.
In February, the government launched a consultation on plans to have smart meters installed in 80 per cent of homes and 73 per cent of small businesses by the end of 2025 to help achieve net-zero targets and save money.
The NAO said the Department for Energy Security and Net Zero (DESNZ) had made recent progress with the rollout, but faced challenges in meeting its latest targets.
The government had worked with industry to develop new smart meter technology that worked in more homes, but there remained a shortage of installation engineers and disagreements with suppliers, who argued they had exhausted the “low hanging fruit” of customers who wanted the devices.
Suppliers were therefore calling for new policies to support the rollout, such...