Can the electricity grid cope with EV charging? A business guide
Updated: 4 days ago
The short answer: EV charging adds electricity demand, but the difficulty depends on where and when vehicles charge. A national electricity total cannot tell you whether a particular warehouse, office or apartment car park has enough capacity. Commercial charging starts with the site and its daily routine.
Research checked 16 October 2026. We distinguish operating installations, completed trials and future possibilities. This is planning information, not an electrical design or a network connection offer.
Energy and power are different
Energy is the amount of electricity used, measured in kilowatt-hours, or kWh. Power is how quickly it is delivered, measured in kilowatts, or kW. Think of filling a container: kWh describes the amount you need; kW describes the flow rate. Several vehicles charging together can demand a high flow, even if their total daily energy requirement is manageable.
For example, ten vehicles each needing 20 kWh require 200 kWh in total. Spread evenly across ten hours, that is an average of 20 kW before charging losses and other constraints. If all ten draw 7 kW at once, their combined demand is 70 kW. These are simplified calculations, not evidence that a 20 kW supply will suit every ten-vehicle fleet.
Why does the local network matter?
Electricity must reach the site through cables, substations and the building’s own electrical equipment. The distribution network operator, or DNO, manages the local network. A connection may need assessment or reinforcement even when electricity is available elsewhere. The installer also needs to assess the site’s other loads, agreed supply capacity, protection and future plans.
Smart charging changes the timing
Smart charging schedules or adjusts charging rather than always starting at maximum power. Load management shares a defined capacity between charging points or responds to the building’s demand. The practical question is whether every vehicle can still receive the energy it needs before departure. A delivery van leaving at 5am and an employee’s car parked until 6pm should not automatically receive the same priority.
This is more than a theoretical idea. UK Power Networks’ Optimise Prime project ran from 2019 to 2023 and investigated commercial vehicle charging with fleets including Royal Mail, Centrica and Uber. Its published reports examine real operating behaviour, flexibility and network planning. Projected financial benefits should not be presented as savings already achieved by every business.
Can a site battery help?
A stationary battery stores electricity and releases it later. It may help a site serve short charging peaks while drawing more steadily from the network. It does not create electricity: it must recharge, loses some energy and adds purchase, maintenance and eventual replacement costs. Its useful size depends on both stored energy in kWh and output power in kW. Ask for a model of a busy day, not just a battery capacity figure.
What about vehicles sending electricity back?
Vehicle-to-grid, or V2G, allows a compatible vehicle and charging system to export electricity. Cenex’s Project Sciurus installed and studied V2G in UK homes during 2018–2021. That demonstrates real trial use; it does not mean every car or bidirectional-looking charger can export today. Vehicle support, equipment, connection approval, electricity arrangements and warranty conditions all need checking. Revenue is not guaranteed.
The right starting point for your business
Record vehicle mileage, arrival and departure times, parking arrangements and expected growth. Ask the installer to explain the required network work, how charging is prioritised, what happens if communications fail and how future bays could be added. A staged installation can be worth considering, but only if the first stage still meets the real operational need.
For a London site, Logic Charge can receive your project enquiry and discuss a proposed introduction to an independent professional. Capacity, cost and delivery dates require that professional’s assessment; choosing a powerful charger from a catalogue cannot establish them.
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