"Rapid charging" gets used a lot when people talk about EVs, sometimes a little loosely. For businesses looking at charging infrastructure, whether that's a staff car park, a retail site, or a fleet depot, it's worth understanding what the term actually means, how it compares to standard charging, and whether it's the right fit for your premises.
What "rapid" actually means
EV charging tends to fall into a few broad speed categories. Slow chargers sit around 3kW to 7kW and can take 6 to 12 hours for a full charge, not practical for anywhere with vehicles that need to turn around quickly. Fast chargers, typically 7kW to 22kW, are the most common type installed at workplaces, usually bringing a car up to full in three to six hours. These suit sites where vehicles are parked for a full shift or longer, staff cars overnight or during the working day, for example.
Rapid charging is a different category. These are DC (direct current) chargers, generally starting around 50kW and running up to 150kW, and they can take a battery from empty to around 80% in roughly 30 to 60 minutes. Above that sits ultra-rapid charging, 150kW up to 350kW or more, which can do the same job in as little as 10 to 20 minutes, depending on what the vehicle can accept.
That last point matters. A 300kW charger sounds impressive, but the vehicle, not the charger, sets the actual limit. Most current EVs can only draw somewhere between 50kW and 150kW, so a higher-powered unit than the vehicle supports won't necessarily charge it faster, it just gives the site headroom for vehicles that can use the extra capacity as they come onto the road.
Why rapid charging is a different proposition for businesses
For a homeowner, rapid charging is rarely realistic, it needs a three-phase, high-current power supply that most domestic properties simply don't have. Commercial and industrial premises are a different story. Many already have, or can more readily secure, the kind of power supply rapid charging depends on, which is why it tends to make far more sense on business premises than on a driveway.
That doesn't mean it's a small undertaking. A single DC rapid charging post can cost anywhere from around £20,000 up to £50,000 once installation and grid works are factored in, and multi-unit sites need proper planning around grid capacity, peak demand, and future expansion. This is very much a strategic infrastructure decision rather than a straightforward hardware purchase.
Where rapid charging earns its keep on commercial sites
Rapid and ultra-rapid charging suits environments where turnaround time matters and vehicles don't sit still for long. Retail car parks, service stations, logistics depots, and fleet sites are common examples, anywhere staff, customers, or vehicles are only on-site for a limited window and need a meaningful amount of charge back quickly.
Depots managing multiple vehicles across shift patterns are a particularly good fit. A mix of fast AC charging for overnight or baseline charging, combined with rapid or ultra-rapid DC units for flexibility during the day, allows a site to handle unexpected demand, extended routes, or fleet growth without everything grinding to a halt waiting for a charger to free up.
There's a cost angle too. Recent RAC Charge Watch data puts the average pay-as-you-go rate for rapid and ultra-rapid charging at around 70p per kilowatt hour, roughly £36 to take a typical 64kWh battery to 80%. For a business offering charging as part of its site or fleet operation, that's a meaningful cost to plan around, whether it's absorbed as an overhead, passed on, or offset against the value of faster turnaround and higher site throughput.
Is it the right move for your premises?
The answer largely comes down to how your site operates. A workplace with predictable, overnight parking and low daily mileage may get by perfectly well with fast AC charging alone. A site with multiple vehicles, tighter schedules, or customers and staff who can't afford to wait hours is a much stronger case for rapid or ultra-rapid infrastructure.
Either way, it's not a decision to make on speed alone. Grid capacity, vehicle types, how the site is actually used day to day, and future growth all need to factor in before committing to a particular power output.
If you're weighing up what's realistic for your business or commercial site, View Electrassure's range to better understand your rapid charging options.
