EV Charging Maths Answer

Ev charging made clearerWhen the schools last went back, Rural Techs tackled the EV charging and electricity distribution maths problem that is facing the UK after 2030.  With the new school year, we’re delighted to provide an update on that answer.

Our concern was that the maths of an all-electric future did not stack up with the required additional generation and distribution services as each change to electric seemed to be taken in isolation. While National Grid was predicting that there would only be an 8% increase in peak generation, if everyone was sensible in their ev charging.

This week there is news of what ‘sensible’ means.

EV Charging Demand Management

We were sceptical that the British public would be likely to follow the hopes of National Grid. The solution which is planned to come into force in May 2022, is that all new chargers after that date intended for home or workplace use, will need to be smart chargers.

Smart chargers at home and in the workplace will be set to automatically not provide a recharge between 8am to 11am and 4pm to 10pm. Apparently the owner will be able to override the default setting if necessary. For a company the easiest solution would be to automatically override the default or allow for a constant interruption of Facilities Manager’s days; when the sales/delivery force ‘just needs to charge’ before leaving or on returning to be ready or to be able to complete the journey.

In addition, there may be randomised delay for 30 minutes at other times to remove pressure on the Grid if too many of us try to use it, at the same time. Public chargers and rapid chargers will be unaffected. They will of course be levying commercial rates for the power.

Underlying Projections

Currently there are 300,000 evs on the road in the UK. Ofgem forecasts that there will be 14M by 2030. This is interesting because for many years there have been c32M licenced petrol and diesel cars on UK roads. Fewer than half will have been replaced in the next 8 years.

Ofgem also projects that 19M home chargers will be required by 2035. Each will need the power equivalence of a small household, if Western Power’s experiment in 2019 is correct. It’s no wonder that a smart solution is legally mandated rather allowing people’s own behaviour to prevail and peak blackouts ensue.