Depot charging means charging an entire fleet of vehicles at their home base, usually overnight, instead of charging each vehicle separately throughout the day.

It’s how most bus systems, delivery fleets, and trucking companies handle electric charging, and it’s exactly what Kempower’s Power Unit and ChargEye software are built to manage.

How depot charging is different from charging at a public station

A public charging station serves random drivers who show up one at a time and don’t know each other. A depot is the opposite: it’s the same group of vehicles, every night, all needing to be full and ready by the same deadline — the start of the next shift. As a result, depot charging hardware must be able to share power across many vehicles at once and make sure every single one is ready on time, not just charge whichever vehicle happens to be plugged in fastest.

There’s also a difference in what “success” means for each. A public charging station operator is running a retail business — the goal is to sell as much electricity as possible to as many drivers as possible, and revenue is tied directly to kWh dispensed. A depot or fleet operator isn’t selling electricity at all. The charger is a cost center, not a revenue line, and the actual goal is keeping the fleet moving – every truck, van, or bus on the road and earning money, rather than parked at a charging plug.

Why depot charging operators care about space as much as power

Space is often the real constraint for depot charging operators, not power. Kempower has the smallest footprint in the market.

Depots are usually retrofitted into existing yards, warehouse lots, or bus garages — not built from scratch with charging in mind. That means space is often the real constraint, not power. A charging system that needs a large cabinet at every single parking spot eats into space a depot needs for vehicle maneuvering, parking density, or future fleet growth.

This is where Kempower’s architecture is built differently. The Kempower Satellite or Kempower Control Unit — the charging dispensers drivers actually plug into — have the smallest footprint in the market, small enough to mount on a wall, roof or a slim pedestal next to a parking space, because they don’t house the heavy power electronics itself. That equipment lives separately in the Kempower Power Unit, which can be installed off to the side, against a fence line, or anywhere else that doesn’t compete with vehicle parking, and then feeds power to up to 12 Kempower charging dispensers at once. A depot can fit far more charging points into the same footprint than it could with bulky, all-in-one chargers at every stall — which matters directly when a depot is trying to add charging without giving up parking spots it needs for the fleet itself.

What makes this work well, and how Kempower handles it

  • Smart power sharing. Instead of giving every vehicle its own dedicated charger, Kempower’s Power Unit acts like a shared pool of power — up to 600 kW from a single triple cabinet, or 1.2 MW combined — that automatically sends electricity to whichever vehicle needs it most at that moment, and shifts as vehicles come and go.
  • Room to grow. A depot charging 10 vehicles today might need to charge 30 next year. Kempower’s Power Unit is built to expand by adding capacity, so fleets don’t have to rebuild their whole charging setup as they grow.
  • Knowing exactly where every vehicle stands. A fleet manager can’t run a morning shift on guesswork. Kempower ChargEye shows, in real time, exactly how charged every vehicle is and when it’ll be ready — so nobody finds out a bus isn’t charged when the driver is already there.

Why this matters to fleet operators

The real risk in depot charging isn’t the charger itself — it’s a vehicle that isn’t ready when it’s needed. Kempower’s combination of flexible hardware and ChargEye’s visibility is built to make sure that never happens.

Kempower Control Unit can be installed on top of the parking bays, taking minimal space.

FAQ

What is the difference between depot charging and public EV charging? Depot charging serves one fleet’s vehicles at their home base on a shared overnight schedule, while public charging serves random drivers throughout the day — Kempower’s Power Unit and ChargEye software are purpose-built for the depot scenario.

How many vehicles can a depot charging system handle? Kempower’s Power Unit delivers up to 600 kW (or 1.2 MW combined) and shares it dynamically across up to 8 charging points from one system, and depots can add more units as the fleet grows.

How do fleet managers know their vehicles will be ready on time? Kempower ChargEye gives fleet managers a real-time view of every vehicle’s charging status, so they know exactly when each one will be ready to go.