EV Charging Load Planning for Building Parking
EV charging is becoming a byelaw expectation. Reserve the load, the feeders and the space now — retrofitting a basement later is brutal.
Provision, don't just install
Most parking will not be fully charged at once today, but the wiring infrastructure (conduits, cable routes, panel space, transformer headroom) is what's expensive to add later. Many State building byelaws now require a share of EV-ready bays — design for the wired-up future even if chargers are phased.
Connected load vs diversified demand
Adding up nameplate charger ratings overstates the real demand. A diversity factor — and, better, active/dynamic load management — caps the simultaneous draw, so the feeder and transformer can be far smaller than the connected total. Without load management, size conservatively.
Use our EV charging load calculator to get a quick connected-load, diversified-demand and supply (kVA) estimate from your charger mix.
Coordinate with the rest of the supply
EV load competes with the building's sanctioned load and DG. Decide early whether EV charging sits on the building supply, a dedicated feeder, or its own connection — and whether solar/storage will shave its peak.
Verify — EV-readiness requirements differ by State building byelaws and amend frequently — confirm the current local requirement and the DISCOM's position on EV load and metering.
Planning this on a live project? Talk to our engineers — design, approvals and execution under one roof.
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