Tesla robotaxi charging: how autonomous fleets will actually get power
Tesla, Waymo and Zoox robotaxis cannot plug themselves in. How autonomous fleet charging works today, what a 5,000-car depot needs, and what comes next.
By Antony OkuribidoPublished Updated 6 min read
Every headline about robotaxis is about the software. The part nobody covers is what happens at 3 a.m. when 5,000 cars come home at 15% state of charge. This post walks through how autonomous fleets are charged today, what a Tesla-scale robotaxi depot needs in power, and why the answer for the next few years is on wheels.
The scale just arrived
In August 2026, Nevada authorized roughly 7,100 robotaxis in Clark County across four operators: Tesla with 5,000, Waymo 1,000, Uber with Aviari 1,000, and Zoox 100, according to The Charge Port's robotaxi tracker and TechCrunch's reporting. One county, one summer. Every one of those vehicles is an electric car that must charge somewhere the utility was not planning to serve.
Robotaxis do not plug themselves in
The vehicles drive themselves. They do not charge themselves. Robotaxis rely on depot staff for charging and maintenance, as Joule Labs explained in 2026 and Electrek's robotaxi guide confirms. A Tesla robotaxi depot is, for now, a parking lot where people walk cables.
That single fact drives the design. Ports go on the attendant's side of pull-through bays. Cables sit on retractors. Vehicles are batched into clusters an attendant can plug in without walking the whole lot. And every port that fails costs an attendant's time and a car's revenue, which is why uptime and repair time are operating metrics for an AV fleet, not contract boilerplate.
What a Tesla-scale depot draws
Take the Nevada number as a planning case. Five thousand vehicles with 80 kWh packs, arriving at 20% and leaving at 90%, need 56 kWh per session. If each car charges 1.25 times a day, the fleet needs roughly 350,000 kWh a day. Spread over 20 operating hours at 92% charger efficiency, that is about 19 MW of continuous charging power, before any allowance for arrival waves after the evening peak.
No leased depot has 19 MW on its service. Even split across ten depots, each site needs about 2 MW, which is a medium-voltage project. Those projects take time: first-time site electrification runs 8 to 18 months per Oxmaint's 2026 planning guide, and utility upgrades 3 to 18+ months per Fleet Rabbit's 2026 guide. The cars arrive on the software schedule.
Why the fix is on wheels
Robotaxi depots are leased, urban and temporary. Service areas expand, depots consolidate, landlords forbid trenching. Permanent switchgear in a building the operator may leave in 18 months is capital left behind.
Mobile megawatt blocks with on-board storage solve the timing and the real-estate problem at once. A 700 kW block feeds about 40 ports at 150 kW with power sharing, recharges from whatever service exists or from on-site generation, and leaves on a trailer when the lease ends. Stack blocks for a bigger depot. Telemetry flows to the dispatch system over OCPP 2.0.1 so the fleet never routes a car to a dead port. See autonomous fleet charging for the configuration.
Hands-free is coming, so do not block it
Attendant plug-in is today. Two paths lead to hands-free charging, and a depot built now should accept either.
Wireless charging for AV and robotaxi fleets is being developed at 7.2 to 50 kW by WiTricity, per a 2026 MarketsandMarkets wireless EV charging insight and EV Infrastructure News on WiTricity's Florida R&D. Electreon acquired InductEV in March 2026, per the same MarketsandMarkets insight, consolidating inductive charging aimed at fleets. Robotic plug-in arms are the other route and suit higher-power DC sessions.
The practical rules: level pull-through pads that can take a wireless coil or a robot later, DC power at the bay, ISO 15118 Plug & Charge so authentication does not need a card tap, and a site controller that treats a wireless pad as one more dispenser.
What an AV fleet should ask a charging provider
- Ports per block, with power sharing, and the layout for attendant flow
- Response time in hours, because the depot is open at 3 a.m.
- MTTR by fault class, not just an uptime percentage
- OCPP 2.0.1 and a REST feed into dispatch
- What happens when the depot moves
MegaWatts publishes its SLA and pricing so those questions can be answered before a call. A Site Power Plan sizes a specific depot in 48 hours.