Few charging sites stay the same size. Demand grows as more EVs arrive, vehicles accept higher power, and fleets expand. A modular charger is designed for this: its power comes from individual modules that can be added, replaced or upgraded inside the same cabinet.
How modular chargers work
Inside a DC fast charger, power electronics convert AC from the grid into DC for the battery. In a modular design, this conversion is split across several identical power modules. The charger's output is the sum of its installed modules. Add modules and the charger delivers more power; remove a faulty one and the rest keep working.
The advantages
- Start small, grow later: install the power you need today and add modules as utilisation rises.
- Higher availability: if one module fails, the charger keeps running at reduced power instead of stopping.
- Faster repairs: technicians swap a module on site rather than replacing the whole unit.
- Lower spares cost: one module type can serve many chargers across a network.
A charger running at reduced power is far better for drivers than one that is out of service. Modular design turns many failures into slowdowns.
Shared power cabinets
Many high-power sites go a step further, with a central power cabinet feeding several dispensers at the bays. Power is allocated dynamically: a vehicle that can accept high power gets more modules, while one near full charge gets fewer. This uses the installed power more efficiently than giving every bay a fixed amount.
Planning for upgrades
| Plan now | Why |
|---|---|
| Cabinet capacity | Choose a cabinet with free module slots |
| Cables and switchgear | Size them for the future power level |
| Grid connection | Confirm the supply can support the upgrade, or plan for it |
| Software | Make sure the platform supports dynamic power sharing |
How PxT can help
PxT Energies designs sites with modular, upgradeable chargers and shared power cabinets, from 30 kW to 1,200 kW, so your site can grow with demand.