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Delivery Van Fleet Depot Load Calculator

Will the depot transformer carry your delivery van fleet chargers? Concurrent-charger limit and upgrade math.

Before signing charger purchase orders, check the transformer. Last-mile vans are the easiest fleet to electrify: predictable ~120 km routes, depot parking every night, and 11 kW AC charging covers the day's energy in under 4 hours. This tool computes how many chargers can run simultaneously inside a safe 80% loading limit, how many rotating groups serve the whole fleet, and what kVA an unmanaged all-on depot would actually need.

14
Chargers that can run at once
OVERLOADS transformer
All-on simultaneous load
Usable capacity200 kVA (80% of 250)
EV headroom165 kW after other loads
Load-managed groups needed2
Upgrade needed for all-on350 kVA

Load management beats transformer upgrades: sequencing chargers into 2 rotating groups serves the whole fleet overnight without touching the transformer — see the ToU scheduler to confirm the window still fits.

Sources: IEEE C57.91 — transformer loading guidance

Planning estimate only — interconnection, protection settings and compliance must be reviewed and signed off by a licensed electrical engineer and your utility before energisation.

Use the free Delivery Van Fleet Depot Load Calculator online — Will the depot transformer carry your delivery van fleet chargers? Concurrent-charger limit and upgrade math. Runs instantly in your browser: no signup, no upload, mobile-friendly.

About Delivery Van Fleet Depot Load Calculator

Before signing charger purchase orders, check the transformer. Last-mile vans are the easiest fleet to electrify: predictable ~120 km routes, depot parking every night, and 11 kW AC charging covers the day's energy in under 4 hours. This tool computes how many chargers can run simultaneously inside a safe 80% loading limit, how many rotating groups serve the whole fleet, and what kVA an unmanaged all-on depot would actually need.

How to use Delivery Van Fleet Depot Load Calculator

  1. 1Enter the transformer rating and your charger fleet.
  2. 2Add other depot loads and the loading limit you'll respect.
  3. 3Read max concurrent chargers, the group count for full-fleet service, and the upgrade size an unmanaged depot would need.

Why use Delivery Van Fleet Depot Load Calculator?

  • ✓Transformer-first thinking: the constraint nobody checks until the quote arrives
  • ✓Safe-loading limit honored (thermal life, not nameplate bravado)
  • ✓Rotating-group count to serve the whole fleet without an upgrade
  • ✓Upgrade size computed for the all-on case, if you really want it

Frequently asked questions

Can my existing transformer support EV chargers?+

Count the headroom: usable capacity (rating × ~80%) minus existing load, divided by charger kW. A 250 kVA transformer with 60 kW of site load supports ~12×11 kW chargers concurrently — and far more vehicles via rotation. The calculator does this with your numbers.

Is load management really a substitute for a transformer upgrade?+

Usually, yes — overnight fleets need energy delivered by morning, not all at once. Sequencing 30 chargers in three groups of 10 serves everyone in an 8-hour window on one-third the capacity. Upgrades become necessary only when the window math (see the ToU scheduler) stops closing.

Why limit transformer loading to 80%?+

Thermal life: continuous loading above ~80% accelerates insulation aging steeply (the transformer hot-spot tools on this site show the physics). EV charging is a long-duration load — exactly the profile that cooks transformers run at nameplate.

What does a transformer upgrade cost versus management?+

A distribution transformer upgrade with civil and approvals typically runs ₹8–25 lakh and months of process; charger load-management features often cost nothing but configuration. Run this tool's group count first — most depots discover the upgrade was optional.

Embed Delivery Van Fleet Depot Load Calculator on your website

Want Delivery Van Fleet Depot Load Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.

Embed code
<iframe src="https://tooljolt.com/tools/delivery-van-depot-load-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Delivery Van Fleet Depot Load Calculator — ToolJolt" loading="lazy"></iframe>

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