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EV charging sounds like it should be quite simple. Just plug the vehicle into the socket, come back a bit later and the vehicle is refilled and ready to go. With a single vehicle, and without too much concern for the electric bill, things can be that easy. But as vehicles and fleets grow, more complexities come into play in EV charging strategies for depots and bases.
Larger vehicles usually use DC instead of AC charging, which leads to the question of what size charger and charging station is required. Once there are more EVs, how many EVs need to charge at the same time? Does every EV need its own charging station, and if so, what size? Can multiple output charge stations be used? Utilities charge large customers for peak power demand, which can maker are spikes from a few vehicles charging simultaneously very expensive. With the right load management EV charging, peak demand charges can often be cut dramatically. Simulating and modeling charging with ChargeSim can lower costs by selecting the right chargers and grid power as part of the overall charging infrastructure EV design.
A vehicle that has a long or overnight break in the schedule may only need a small 30kW charger. When the schedule allows less time to recharge, more power must be delivered in less time. This requires bigger chargers, often 150kW or even 450kW fast charging EV stations for short layovers and on-route opportunity charging. Larger chargers are expensive, demand more power from the utility grid, and fast battery charging is more detrimental to pack lifetime.
Vehicles in a fleet are often interchangeable, and in some cases, instead of fast charging one vehicle, it can be swapped with another so both vehicles have more time available for battery charging. This flexibility plays a key role in fleet-level EV charging strategies.
As the fleet grows, there are more options to adjust charging patterns to reduce the total power and number of charging stations required. ChargeSim helps analyze what size chargers are really needed, or whether fast charging is unavoidable during peak periods.This allows planners to optimize power demand charging without compromising vehicle availability.
One of the first questions that comes up when planning fleet electrification is how much power the depot will need from the grid. Utilities have long lead times to deliver the high-power connections required for fleet electrical charging station installations, so this question often needs to be answered early in the planning process.
The depot power required varies with fleet mileage, the time available for charging, the amount of overlap between charging sessions, and the EV charging strategies used. ChargeSim translates the planned schedule into utility requirements for the right-size grid connection early in the planning process, preventing costly over- or under-installation of charging infrastructure EV assets.
Load management EV charging is becoming essential for large EV charging installations to prevent expensive peak power demand charges. Without charge management, rare cases where many vehicles are charging simultaneously at high power for just a few minutes can add €10k to a monthly electricity bill, sometimes locked in for a year. ChargeManagement and Smart Charging can dramatically reduce utility bills and make much better use of charging stations, especially those with multiple outputs.
Reducing installed electric power capacity early in the design phase saves unnecessary cables, transformers, and chargers, reducing capital costs. ChargeSim finds the right balance between over-installation, high utility bills, and insufficient power that could leave vehicles undercharged.
There are several basic smart charging methods, and the choice can have a dramatic impact on overall performance. At fleet scale, how EV charging stations work becomes a question of power limits, scheduling, and charging overlap rather than simple plug-in behavior.
Two common approaches are based on average power distribution and first-come, first-served charging. With average power charging, the available power is distributed evenly across all connected vehicles, resulting in lower individual charging power and longer charging times.
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The alternative, first-come, first-served charging, prioritizes vehicles that arrive earlier. This allows those vehicles to be ready for dispatch sooner but can increase peak power demand charging and reduce overall efficiency. ChargeSim helps determine which approach works best for a specific fleet, base layout, and operating schedule.
Both have advantages and disadvantages, depending on the fleet and schedule. ChargeSim helps find the right smart charging methods for a fleet, base and schedule.
As fleet electrification scales up, charger and grid sizing become increasingly important. Oversizing charging stations was acceptable during early pilot projects, but at full depot scale, unnecessary excess capacity becomes wasted capital. With fully electrified bases, future growth depends on new vehicles and parking capacity, not unused chargers.
Some reserve capacity is valuable, especially when combined with flexible EV charging strategies, but excessive unused infrastructure no longer represents a future investment.ChargeSim helps avoid unnecessary excess charging capacity and installation costs.
Multiple output chargers are playing an increasing role in modern charging infrastructure EV designs.A single charger capable of serving multiple vehicles sequentially or simultaneously can make much better use of expensive grid and charging station capacity. Proper planning of which parking positions connect to which outputs is essential to maximize utilization and operational flexibility. ChargeSim helps design multiple-output charging stations to maximize performance and minimize idle capacity.
Simulating charging layouts, predicting performance, and iterating virtually early in the design process helps avoid excess costs from over-installation and late-stage changes. As fleet electrification places greater demand on capital budgets and utilities, EV charging strategies must be designed with the same rigor applied to other critical infrastructure systems. ChargeSim enables upfront design of charging configurations, eliminating high-risk trial and error.
This is not intended as financial or technical advice and ChargeSim accepts no liability for actions taken based on it. Always consult a professional about your specific situation.