Charging Infrastructure Sizing Tool
Estimate daily charging demand for an overnight fleet, test charger power ratings, and see whether a depot layout is likely to fit within a realistic site connection envelope.
20 vehicles, overnight charging, no excess hardware
Sizing can often be solved with smart load management instead of adding more hardware. The useful question is whether vehicles can be rotated across a fixed charging window.
This calculator provides a depot planning estimate only. Earthing design, diversity assumptions, protection equipment, and network approval still require a qualified electrical design review.
Load management first
Smart charging often avoids a major grid reinforcement in phase one. Restrict the site to a fixed import cap and move vehicles through a managed charging queue overnight.
Survey the depot layout
Cable routes, parking patterns, bollard protection, and driver access matter as much as charger count. Installation cost rises quickly when civil works become awkward.
Plan for staged expansion
A depot that starts with 12 EVs may move to 28 within one procurement cycle. Leave spare capacity in switchgear and duct routes even if chargers are added later.