Electrifying a delivery fleet: charger count, depot load and the rollout sequence

Key Takeaways

• Charger count is not one-per-van by default. On a single overnight shift it usually is; on a staggered multi-shift roster, fewer chargers can serve more vehicles because not every van is parked at once.
• AC chargers run roughly 1.4 kW to 19.2 kW; DC fast chargers reach up to 400 kW (Wikipedia, retrieved 2026-09-08) — that spread is what actually sets the depot's peak electrical demand.
• A 20-van depot on individual AC bays can draw 150 kW to 440 kW simultaneously depending on charger power — the number a utility load-upgrade application is built around, not the vehicle count.
• The rollout sequence that avoids stranded chargers is pilot, apply for the load upgrade early, then scale in tranches tied to the existing fleet's replacement cycle.
• Get the load number right before the hardware order goes in; re-sizing a depot connection after chargers are installed costs more than doing it first.

A fleet manager converting delivery vans to electric usually starts by asking how many chargers to buy. That is the wrong first question. What actually constrains a depot conversion is the electrical load those chargers place on the site at once, and that is set by charger power and shift pattern, not vehicle count. Two 20-van depots can need very different connections depending on whether the chargers run at 7 kW or 22 kW, and whether all 20 vans plug in together or in staggered waves. AC chargers typically deliver between 1.4 kW and 19.2 kW, DC fast chargers up to 400 kW (Wikipedia, retrieved 2026-09-08) — a spread wide enough that "how many chargers" means nothing until the power rating is fixed. Run the fleet's own vehicle count and shift pattern through the mobile EV fleet calculator before pricing any hardware quote.

The charger count question and the depot load question are the same question asked twice. Get the load number wrong and the charger count that follows from it is wrong too.

Charger count follows the shift pattern, not the fleet size

A single-shift delivery fleet — every van out by day, parked by early evening — needs close to one charge point per vehicle. There is no second use for a bay overnight, so 20 returning vans need 20 places to plug in; no depot reshuffles the yard at midnight to share bays.

A multi-shift or staggered-return fleet is different: the depot never needs more charge points than the largest group parked at once. A 30-van fleet on three staggered eight-hour shifts might need only 12 to 15 bays with reservation or queuing logic, because vehicles rotate through rather than arriving together. Transit operators use the same principle for electric buses, pairing slower 50 kW to 175 kW overnight charging with a smaller number of higher-power chargers for vehicles needing a mid-shift top-up (Wikipedia, retrieved 2026-09-08). Know the shift roster before ordering hardware — it changes the charger count more than the fleet size does.

The depot load is charger count multiplied by charger power

Once the bay count is fixed, the electrical question is simple multiplication, worth doing on paper before a supplier quote arrives. Twenty vans on individual 7.4 kW AC bays, all plugged in overnight, is a simultaneous demand of roughly 148 kW. The same 20 bays at 22 kW three-phase AC — chosen to charge faster or serve a multi-shift roster — comes to 440 kW. That is the difference between a load most light-industrial premises can absorb with a modest upgrade and one that almost certainly needs a substantial new supply. For scale, DEWA's own public DC fast chargers bill at up to AED 1.20 per kWh precisely because they draw far more instantaneous power per bay than a depot AC connection ever needs to (Emirates247, retrieved 2026-09-08) — a useful sense check before specifying DC bays a depot does not actually need.

<!-- [CHART: depot simultaneous kW demand at 7.4kW, 11kW and 22kW per-charger power across a 10, 20 and 40-van depot] -— Faster charging is not automatically right. A ten-hour overnight window rarely needs 22 kW bays at all — 7.4 kW comfortably refills a 40 kWh van in about five and a half hours, with headroom to spare, at a third of the peak demand. Reserve higher-power bays for vans that genuinely need a mid-shift top-up, and size the rest of the fleet to the slower, lower-demand charger. Sizing every bay for the fastest possible charge is the most common way a conversion ends up needing a bigger utility connection than the operation requires. ## The utility connection sets the rollout's pace, not the charger brand Whichever emirate the depot sits in, the distributor — DEWA in Dubai, TAQA Distribution in Abu Dhabi — has to confirm the existing supply can carry the added load, and increase it if not. That is a capacity question the charger supplier cannot answer; it sits with the utility and the site's electrical contractor. Neither authority publishes a standard processing time for a commercial load increase, and both authorities' relevant pages returned access errors on direct fetch during research for this article — treat any turnaround quoted by a contractor as unverified until the utility confirms it in writing for the site itself. What is safe to plan around is sequencing: a load upgrade is not switched on at the meter-reading visit, and it depends on the scale of the increase and the local network capacity in that area. Submitting the application before the vehicle order — not after the first vans arrive — is the difference between chargers waiting for vans and vans waiting for chargers. ## A rollout sequence that does not strand chargers or capital Four stages keep the conversion from over-building in either direction. 1. **Pilot on existing spare capacity.** Convert two or three vans first, on whatever headroom the current connection already has, no utility application needed. This is where real overnight kWh draw gets measured against the manufacturer's nameplate figure, which almost always overstates it. 2. **Apply for the load increase against the pilot's real numbers**, not the full fleet's nameplate figures. A measured application is more defensible and avoids over-ordering capacity that then sits unused. 3. **Scale in tranches tied to the fleet's replacement cycle.** Retire diesel vans as leases end or depreciation completes, rather than converting everything in one capital event, correcting the charger mix as each tranche reveals more. 4. **Revisit the charger power mix once dwell-time data exists.** A depot that assumed every bay needed 22 kW often finds most vans were comfortably done on 7.4 kW, with only a handful of late returners needing the faster option. Commissioning the upgrade as a structured [group EV charging solution](/calculators/en/solutions/group-ev-charging-solutions), rather than adding chargers piecemeal as vans arrive, keeps the electrical design, the utility application and the rollout schedule in one plan instead of three reconciled after the fact. ## Frequently asked questions ### Do we need one charger per van? Only on a single-shift fleet where every vehicle returns and parks at roughly the same time. On a staggered or multi-shift roster, fewer charge points than vehicles can work, because not every van needs to be plugged in simultaneously. ### How do we know if the depot's electrical supply is enough? Multiply simultaneous charge points by each charger's power rating for peak demand in kW, then check that against the site's existing supply with the utility or an electrical contractor before ordering chargers. ### Should we install AC or DC chargers at the depot? AC, for most overnight single-shift fleets — a ten-hour dwell window rarely needs anything faster, and it keeps peak demand and installation cost down. DC fast charging earns its place for vans needing a genuine mid-shift top-up, not as the default for every bay. ### How long does a utility load-upgrade application take? Neither DEWA nor TAQA Distribution publishes a fixed timeline; it depends on the scale of the increase and the local network. Submit the application as soon as the pilot's real consumption numbers exist, well before the wider vehicle order. ### What is the right pilot size before committing to a full depot build? Two or three vans is usually enough to capture a realistic overnight kWh figure per vehicle without needing a utility application first. That measured figure, not the nameplate consumption, should drive the full load-upgrade application and the wider order. ## The bottom line The question a delivery fleet conversion turns on is not how many chargers to buy; it is the peak load those chargers place on the depot at the busiest hour, and whether the site's supply can carry it. Shift pattern decides charger count, charger power decides the load, and the load decides whether the utility needs to get involved before a single van arrives. Sequence the work in that order — pilot, measure, apply, then scale — and the rollout tracks the fleet's actual replacement schedule instead of racing ahead of the depot's electrical capacity or falling behind it. *Figures on charger power classes and depot charging practice were verified on 8 September 2026 against Wikipedia's Charging station and Electric bus articles; DEWA's public EV Green Charger rates were cross-checked against Emirates247. WebSearch was unavailable for this session (budget exhausted), so verification relied on WebFetch against these named sources. DEWA's and TAQA Distribution's own pages on commercial load-increase applications returned access errors on direct fetch and could not be checked first-hand; confirm current load-upgrade procedures and timelines directly with the relevant utility before submitting an application.*