A common question appears when a customer starts planning a larger charging site: what is the difference between a distributed system and a standalone charger? The short answer is that the difference can be significant in both cost and long-term performance.
Here is the practical version.
Standalone charging: simple, but with clear limits
A standalone DC charger is a complete unit with power electronics inside, connected to the grid and charging one vehicle. It has no external dependency.
It works well for isolated locations, occasional charge points or small installations with one or two vehicles. The problem starts when the site scales: ten standalone 150 kW chargers mean buying 1.5 MW of power electronics even if that peak is rarely used at the same time.
Distributed charging: one power unit, many delivery points
Distributed charging separates power conversion from the dispensing point. Central power units feed several dispensers, and the available power is dynamically allocated to the vehicles that need it.
At an electric truck depot, some vehicles may request high power while others are already close to target state of charge. A distributed architecture reallocates that spare capacity in real time.
The point is not to install the theoretical maximum at every outlet. The point is to size the architecture for real operating demand.
Why this changes the economics
Contracted power and power electronics are major costs. A distributed architecture can reduce total installed power, lower upstream electrical infrastructure and centralize maintenance.
- It uses demand diversity between vehicles.
- It reduces transformer, protection and cabling costs.
- Adding a dispenser is cheaper than adding a full charger.
- Sensitive electronics are centralized in the power unit.
Where standalone still wins
Distributed charging is not universal. In small sites with two or three points, the extra complexity may not pay back. It can also lose relevance when dispensers are far apart or when absolute point-by-point redundancy is required.
The megawatt step
With BLAZE Hyper, Pyrovolt uses a distributed architecture for high-power charging: a 960 kW or 1,280 kW central power unit and dispensers capable of up to 1 MW per outlet.
That makes it possible to size installed power around actual operation rather than a theoretical peak where every outlet is at maximum load.
How to choose
- Number of charging points: below three or four, standalone is often practical; beyond that, distribution starts to pay off.
- Usage profile: uneven peaks favor distributed systems.
- Power per vehicle: ultra-fast and megawatt applications usually make distributed charging the economically viable option.
In short
Standalone charging is simple and effective for small or dispersed sites. Distributed charging becomes more cost-efficient and scalable as the installation grows or power levels increase.
Sizing a high-power charging site?
We can review charge points, usage profile, available power, MV connection, BESS needs and VoltCore operation to define a realistic architecture.