EV CHARGING
WHY A SMART EV CHARGING REVOLUTION IS NEEDED TO ALLEVIATE PRESSURES ON THE GRID
William Goldsmith, Global Head of Grid Services at ev.energy
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here has been a rapid rise in the uptake of electric vehicles in recent years and, considering the ZEV mandate coming into force in 2024, this is only expected to increase. Yet, more work is needed to deliver infrastructure suitable for mass adoption. The most pressing task is ensuring the grid can support the growing electricity demand. Meanwhile, energy providers are tasked with generating 100% zerocarbon electricity by 2035. However, it was recently revealed that the UK’s Energy Systems Operator is struggling with connecting renewable energy developers – many are facing waits of up to a decade to be connected. Moreover, concerns around electric vehicle (EV) charging infrastructure being unable to match the rapid rise in EV uptake persist. These challenges require bold, collaborative action. Grid infrastructure is just one part of the story. To create the green, reliable grid that Great Britain needs, we must embrace new technology to revolutionise
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grid dynamics. Smart charging - which uses innovative technology, data, and communication to optimise EV charging in line with grid supply and demand provides grid operators with a secret weapon. This technology can ultimately evolve EVs into a significant asset for the National Grid, as opposed to a strain.
HOW DOES SMART CHARGING WORK? Grid supply and demand changes throughout the day and by season, for various reasons, such as a peak in usage or a shift in weather conditions, causing a fluctuation in prices and carbon emissions. Currently, most drivers plug in their EVs in the evenings and begin charging right away, coinciding with the natural peaks in domestic energy demand when many return home to cook dinner, put a wash on, and watch TV. This causes a significant strain on the energy grid, meaning costs are usually at their highest. If there is less power being made through renewable sources, such as solar and wind, limited supply could increase prices even further. In some cases, costly, high-carbon and unsustainable energy sources, such as coal or gas, may be used to keep up with this peak in demand. In Great Britain, wholesale energy prices, the cost at which energy
ENERGY MANAGER MAGAZINE • NOVEMBER/DECEMBER 2023
suppliers buy power, are updated every 30 minutes. These prices may then be passed on to households, depending on the tariff they have with their energy supplier, to encourage using energy at off-peak times and reduce strain on the power grid. Smart charging presses “pause” on charging until the demand on the grid has gone down and allows drivers to power up the battery in their EV when energy is cheapest and most environmentally sustainable.
THE BENEFITS OF SMART CHARGING With smart charging, EV owners can reap the rewards of lower-priced, lower-carbon energy by charging at off-peak times when energy is more readily available, such as through the night, or during “low-carbon events” – for example, during a storm when greater amounts of energy can be produced by wind. Optimising charging this way also helps in balancing the electricity grid. Smart charging technology can predict and select the best times to charge based on one’s energy tariff and the estimated carbon intensity of the grid. This simple change could save approximately £702 on energy bills and reduce the personal carbon emissions of charging your car by up to 15% each year. One year of smart charging saves 140 kg of carbon – the equivalent to the carbon sequestered in seven 10-year-old trees. For solar panel owners, apps such as ev.energy can find the local solar forecast and automatically charge an EV with self-generated, zero-carbon, renewable energy when the sun is shining, creating a further opportunity to save and reduce demand on the grid. For network operators, smart charging provides a powerful tool to integrate the rising number of electric vehicles and power them with green energy when it’s in abundance, while also bolstering their networks, all faster and at less cost. Smart charging is therefore a winwin-win situation for households, energy providers, and the government, delivering the changes needed to empower a
