Huy Nguyen

A new report from think tank Green Alliance warns that the UK Government needs to help the country’s power system catch up with the growth of electric vehicles and solar by transforming the UK national grid.

At present, the UK national grid is woefully prepared to meet the demand on the system by increasing solar power systems and electric vehicle takeup.

More consumers are choosing to buy small-scale renewable energy technologies according to the report, which warns that consequences of not upgrading the grid urgently could be disastrous. If no action is taken, just six electric cars charging in close proximity at peak time could overload the grid and disrupt the local power supply.

This in turn would provide ample ammunition for critics of renewable energy that want to see clean energy growth stopped in its tracks. At present, one in five of the UK’s local grids are unable to accept more distributed energy like rooftop solar. However, if the Government designs a smarter power system now, electric car batteries could store enough power to keep the UK’s lights on for 7 hours at a time by 2025, virtually eliminating blackouts, and distributed energy could save customers over £1.6 billion per year. Growth in clean energy development is moving increasingly fast.

By 2020 IKEA will be a net exporter of its own solar and wind energy, and the falling price of battery storage could soon allow UK households to operate off the UK national grid for months at a time.

The report predicts that the UK will reach a tipping point as soon as 2020, when government will lose the ability to control the speed of small scale energy deployment. Similar tipping points outside the UK have seen mixed responses: In Nevada, attempts to clampdown on rooftop solar’s effect on the local power system were met with ferocious consumer backlash, ultimately leading to a reversal of new less favourable tariffs and the grid administration being sacked. This should be a warning to the UK Government, but how much notice will it actually take? In California, smart EV charging infrastructure has been used to  keep the lights on at peak times and given that 40 per cent of drivers would consider buying an EV, the UK should follow California’s lead.

Intervention needed

The report says four main government interventions are necessary to get the benefits of small scale energy:

*A new independent system designer should be employed to ensure small scale energy is well integrated.

*Distribution network operators (DNOs) should be transformed into distribution system operators to actively integrate EVs and solar in a smart network.

*Small scale technologies should be enabled to provide system flexibility, for instance through smart charging of EVs.

*Automation and aggregators should be adopted to make more flexible ‘time of use’ tariffs attractive to customers.

“The energy transition is unstoppable and will in part be …