Dual-port chargers are EV charging stations with two ports that allow two vehicles to connect simultaneously. Depending on the hardware and configuration, a dual-port charger may deliver full power to one vehicle, split power between two vehicles, or dynamically allocate available power using load balancing. Dual-port chargers are widely used in the workplace, retail, multi-family residential, fleet, and public destination charging, where maximizing charging capacity per installed unit is important.
What Are Dual-Port Chargers?
Dual-port chargers (also called dual-outlet or two-socket EV chargers) combine two charging points into a single enclosure or pedestal.
– One charger serves two parking bays
– Each port can be a socket (drivers bring a cable) or a tethered cable configuration
– Many dual-port AC chargers use Type 2 sockets in Europe and can support multiple user access methods
– Smart versions connect to a Charge Point Management System (CPMS) via OCPP for monitoring, billing, and reporting
Why Dual-Port Chargers Matter in EV Infrastructure
Dual-port chargers help scale charging faster and more cost-effectively at many sites.
– Improve cost per bay by serving two spaces with one charger installation
– Reduce the number of wall/pedestal units needed for the same parking coverage
– Make better use of the limited site capacity by enabling power sharing rather than fixed full-power allocation to each bay
– Support higher utilisation in busy destinations by increasing the chance that at least one port is available
For property owners and fleet operators, dual-port chargers are also a practical way to expand charging access without immediately upgrading the grid connection.
How Dual-Port Charging Works
A dual-port charger manages two connectors while operating within a defined electrical limit.
– Two vehicles plug into the two ports
– The charger authenticates each user and starts separate charging sessions
– The charger allocates power based on configuration and real-time conditions using one of these approaches:
– Sequential mode: charges one vehicle at a time at higher power
– Fixed split: divides available power evenly between ports
– Dynamic sharing: adjusts each port’s power continuously based on demand and site limits
– Session data is recorded for each port for reporting and charging analytics
When integrated with site control, dual-port chargers can also follow energy throttling rules and building load limits.
Typical Power Configurations
Dual-port output depends on supply, charger design, and site limits.
– Shared 7.4 kW: split or allocated across two ports in single-phase sites
– Shared 11–22 kW: common in three-phase commercial installations
– Per-port limits may apply to ensure fair distribution and avoid overloading circuits
Actual charging speed also depends on the vehicle’s onboard charger capability and charging behavior.
Where Dual-Port Chargers Are Commonly Used
– Workplace parking where multiple employees need access
– Retail and leisure destinations with long dwell times
– Multi-family residential garages with shared charging infrastructure
– Fleet depots where vehicles park in predictable bays
– Public destination charging where space and hardware density matter
Key Benefits of Dual-Port Chargers
– Better utilization of installation footprint and cabling routes
– Lower total hardware count for the same number of charging bays
– Flexible scaling when paired with load balancing
– Strong reporting per port for usage, billing, and kWh delivered per charger metrics
– Cleaner site layout, especially with central pedestals serving two bays
Limitations to Consider
– When both ports are in use, each vehicle may receive reduced power depending on the sharing logic
– User experience depends on clear signage and fair allocation rules
– If the unit fails, two bays can be impacted at once
– Cable management is critical to avoid trip hazards and connector damage
– Some sites prefer single-port chargers where guaranteed full power per bay is required
Related Glossary Terms
Power Sharing
Load Balancing
Energy Throttling
Charging Session
kWh Delivered per Charger
Parking Bay Layout
Socket vs Tethered Cable
OCPP 1.6 / 2.0.1