Why electricity capacity matters just as much as the charger itself
On the surface, installing EV chargers looks simple: pick a location, choose the hardware, get the wiring done, and switch them on.
But anyone who’s been involved in a real project knows there’s a bigger challenge behind the charger: the EV grid upgrade, the electricity grid itself.
That’s why the UK Government is now looking at a major upgrade. A proposed Strategic Charging Infrastructure Scheme could unlock around £190 million to strengthen electricity networks at motorway service areas in England. The idea is to make sure there’s enough capacity to meet future charging demand. The Competition and Markets Authority’s Subsidy Advice Unit is currently reviewing the plan.
For businesses, the message is clear: choosing the right charger is only half the story. If the grid connection isn’t strong enough, your installation may never get off the ground.
Why grid capacity is the hidden factor in EV charging
A single home charger is usually no problem for the local network. But scale that up to a workplace car park with multiple 7kW chargers, and the demand quickly adds up.
Go further — think 22kW AC chargers, rapid DC chargers, or a full charging hub — and the strain on the grid becomes even more obvious.
If the local network can’t handle it, you may need reinforcement, a new connection, or a rethink of the project. That’s why EV charging isn’t just about buying a box and bolting it to the wall.
What the Government is proposing
The scheme is designed for motorway service areas where upgrading the grid would otherwise be too costly for operators. The Government would fund the upgrades and reserve the extra capacity for charge point operators.
The goal? To support charging demand well into the 2030s and even 2050s.
It’s worth noting this isn’t a general grant for businesses — it’s focused on service areas in England. But the principle applies everywhere: the grid has to grow alongside EV adoption.
What this means for London businesses
If you’re planning workplace or commercial EV charging in London, think beyond today’s needs. Four chargers might be enough now, but what about in five years when most of your staff or fleet vehicles are electric?
A proper site survey can reveal:
- How much electrical capacity you already have
- What charger outputs are realistic
- How many units can run together
- Whether load management could help
- If a three‑phase supply is needed
- Whether a DNO application is required
- How to prepare for future expansion
Skipping this step risks installing a system that works today but becomes a headache tomorrow.
Why smart load management matters
Not every site needs a bigger grid connection. Smart charging and load balancing can spread available capacity across multiple vehicles, preventing overloads.
Instead of every charger running flat‑out, the system adjusts power based on demand and supply. This is especially useful for offices, apartment blocks, car parks, and fleets where several EVs may plug in at once.
The right approach depends on your site’s infrastructure and how drivers use the chargers.
The grid is now part of EV planning
The Government’s motorway scheme highlights a bigger truth: the UK’s EV transition isn’t just about chargers; it’s about the grid.
More EVs mean more charging. More charging means more pressure on the network. And for larger installations, the grid connection is as critical as the charger itself.
For London businesses, planning is key. Understanding your site’s capacity and future needs before installation can save time, money, and frustration.
Planning an EV charger installation in London?
Whether you’re fitting a few chargers for staff or building a larger commercial hub, the first step is knowing what your site can realistically support.
At London EV Chargers, we help businesses assess capacity, plan infrastructure, and design systems that work today — and scale for tomorrow.
Because in EV charging, the groundwork isn’t just electrical. It’s strategic. And getting it right from the start can make all the difference.