Depot charging vs public charging for a commercial EV fleet: the cost and uptime trade-off

Key Takeaways

• DEWA's public EV Green Charger network bills AED 0.70 per kWh for AC charging and AED 1.20 per kWh for DC fast charging, both plus 5% VAT, against a blended UAE commercial electricity rate of roughly AED 0.405 per kWh.
• On that gap, charging a 40 kWh van nightly at the depot costs about AED 16 a night; the same charge on the public AC network costs about AED 29, and on a DC hub about AED 50.
• Neither DEWA nor TAQA Distribution runs a time-of-use commercial tariff, so depot charging is cheaper at any hour, not only overnight.
• Public ultra-fast hubs remain a shared, finite resource — one flagship Abu Dhabi hub runs 60 bays nationally — so uptime for a scheduled fleet depends on queueing, not just price.
• The decision is really about the depot's electrical capacity, not the charger brand: size that first.

A fleet manager pricing an electric van conversion usually starts by comparing charger brands. The number that actually decides the business case is the per-kWh rate the vehicle charges on, and that rate is not the same everywhere a plug exists. DEWA's public EV Green Charger network, now over 1,270 points across Dubai, bills AC charging at AED 0.70 per kWh and DC fast charging at AED 1.20 per kWh, both plus 5% VAT (Emirates247, retrieved 2026-09-07). A depot charging the same van overnight on a standard business electricity connection pays closer to AED 0.405 per kWh, the blended commercial rate across Dubai and Abu Dhabi's utilities as of December 2025 (GlobalPetrolPrices, retrieved 2026-09-07). Run your own fleet's nightly kWh draw through the EV bay capacity calculator before pricing either option against a supplier's quote.

That is not a rounding difference. It is the gap between owning a fleet's charging economics and renting them by the session, and it holds regardless of which network ends up covering the exceptions.

The per-kWh gap, worked in real dirhams

Depot charging is recharging a fleet vehicle at its home base on a standard commercial electricity tariff, rather than on a public network's separate, higher per-session pricing.

<!-- [ORIGINAL DATA: per-vehicle and per-fleet annual cost synthesis, calculated from DEWA's published public rates and the blended UAE commercial electricity rate] -— Take a mid-size electric delivery van drawing roughly 40 kWh to refill after a working day. Charged at the depot on the blended commercial rate, that costs about AED 16.20. Charged on DEWA's public AC network with VAT added, it costs about AED 29.40. Charged on the DC fast network, about AED 50.40. Over a 300-operating-night year, one van moves from roughly AED 4,860 on depot power to AED 8,820 on public AC, or AED 15,120 on public DC — a difference of AED 3,960 to AED 10,260 per van, per year. Scale that to a 20-van fleet and the annual gap between depot charging and routine reliance on public DC fast charging runs to roughly AED 205,000. That is the number worth putting in front of a finance director before a single charger is ordered, and it is the number that turns a marginal EV conversion into an obviously good one, or the reverse. ## No time-of-use discount, so the advantage is structural It is worth correcting an assumption some operators bring into this decision: neither DEWA nor TAQA Distribution — the entity now billing what were previously the separate ADDC and AADC service areas in Abu Dhabi — runs a time-of-use commercial tariff. There is no cheaper rate for charging at 3am than at 3pm on a standard business connection. The saving comes from the rate category itself, not from scheduling around a peak window: charge whenever the van is parked, because the cost per kWh does not move. It also means the Emirates Water and Electricity Company (EWEC), often assumed to set Abu Dhabi's retail power price, is not the entity a depot's bill actually comes from. EWEC procures and plans supply at wholesale level; TAQA Distribution bills the commercial tariff, in the same way DEWA does in Dubai. Worth having straight before negotiating a bulk supply agreement. ## Why uptime, not just cost, favours the depot A van that returns to a depot every evening has eight to ten hours of dwell time it would otherwise waste. Depot charging fills that time with slow, low-stress AC charging that never competes with a delivery schedule. Public fast charging works against the schedule instead: even ADNOC Distribution's largest superfast hub, one of the biggest in the world, runs 60 charging bays and gets most EVs from 0 to 80% in about 20 minutes ([China Daily](https://www.chinadaily.com.cn/a/202601/19/WS696d8ab0a310d6866eb34731.html), retrieved 2026-09-07). Twenty minutes sounds fast against a fuel stop, but it is twenty minutes not delivering, and it assumes a bay is free on arrival, which a shared network cannot guarantee the way a reserved depot charger can. That queueing risk compounds with fleet size. One or two vans routing to a public hub mid-shift is a manageable detour; twenty vans doing the same thing, on a network also serving private drivers and taxis, turns a pricing decision into a scheduling gamble. ## Sizing the depot connection before you commit The constraint that actually decides this trade-off is rarely the charger itself; it is whether the depot's existing electrical supply can carry the extra load. Twenty vans drawing 40 kWh overnight is 800 kWh of demand that has to move through the site's connection in a single window, which is a capacity question long before it is a tariff question. That is the sizing work the [EV bay capacity calculator](/calculators/ev-bay-capacity) is built for: how many bays, at what charger power, the existing supply can actually support before an upgrade is needed. Where the answer is "not yet," the practical path is to commission the upgrade as a structured [group EV charging solution](/calculators/en/solutions/group-ev-charging-solutions) rather than adding chargers one at a time as vans arrive. A capacity upgrade with the local utility has a lead time measured in months, not weeks, which is the argument for starting the depot conversation before the fleet has fully turned over, not after the last diesel van is due for replacement. ## Where public charging still earns its place None of this makes public charging redundant. It is the right tool for a van on a route too long to return to depot mid-shift, for a depot still waiting on a capacity upgrade, and for piloting a few vehicles before a full depot build-out. Genuinely free charging is also rarer than it looks: most of what still shows as free is a mall promotion, a hotel guest perk, or an introductory offer on a newly opened charger, not something a fleet can plan around ([Gulf News](https://gulfnews.com/uae/this-app-helps-uae-ev-drivers-track-free-charging-stations-before-they-hit-the-road-1.500615258), retrieved 2026-09-07). The mistake is treating public charging as the default rather than the overflow: priced correctly, it runs 80% to 210% above a depot connection — fine occasionally, expensive nightly. ## Frequently asked questions ### Is public EV charging in the UAE ever cheaper than charging at a depot? Not on a straight per-kWh basis under current published rates: DEWA's public network bills AED 0.70 to AED 1.20 per kWh plus VAT, against a blended commercial rate of roughly AED 0.405 per kWh. Public charging can still be the cheaper overall choice for a van that would otherwise need an expensive depot capacity upgrade it does not yet need for any other reason. ### Does DEWA offer a discounted rate for overnight EV charging? No. Neither DEWA nor TAQA Distribution runs a time-of-use tariff for the commercial category, so there is no published rate advantage to charging at a particular hour. The saving from depot charging comes from the tariff category itself, not from timing. ### How many charging bays does a 20-van depot actually need? It depends on charger power and the shift pattern, not just fleet size: a handful of higher-power bays can turn over multiple vans in one overnight window, where more, slower bays need one per van. Run the fleet's kWh-per-night figure and shift length through the EV bay capacity calculator rather than assuming one charger per vehicle. ### What happens if the depot's electrical supply cannot carry the extra load? The utility will need to assess and, usually, upgrade the site's connection before the full charger count can be installed, which is a lead-time item worth starting early. Interim reliance on public charging, or staged rollout of chargers as capacity becomes available, are the two practical bridges while that upgrade is in progress. ## The bottom line The decision is not charger brand or network membership; it is whether the depot has, or can get, enough electrical capacity to charge the fleet where it already parks overnight. Where it can, depot charging wins on cost by a wide and structural margin, because neither Dubai's nor Abu Dhabi's utility offers a cheaper hour to chase. Public charging keeps its place as the answer for routes that cannot return to base, and as the bridge while a depot's capacity catches up with its fleet. Size that capacity question before signing a public network contract as a long-term strategy, not a stopgap. *Figures were verified on 7 September 2026 against Emirates247, Gulf News, GlobalPetrolPrices and China Daily; WebSearch was unavailable for this session (budget exhausted), so verification relied on WebFetch against these named sources rather than a broader search. DEWA and TAQA Distribution's own tariff pages returned access errors on direct fetch and could not be checked first-hand; readers should confirm current rates directly with their utility before committing capital.*