11
Ventilation
Ensure that any installation, especially an indoor installation, has adequate airflow to dissipate the
charging station’s heat at maximum operation. Each Express 250 charging station emits
approximately 3.3 kW of waste heat at maximum operation.
The charging station location must allow fresh ambient airflow. Restriction of airflow might result in
reduced maximum performance. Do not install a station where it is exposed to air that is heated
above ambient temperatures.
In addition to the service clearances listed in the “Clearances” section, consider these figures for site
layout:
• If a charging station will have a wall directly behind it, minimum rear clearance is 305 mm
(12 in).
• If two Express 250 charging stations will be positioned back to back, increase the rear clearance
to a shared 610 mm (24 in) for both stations to reduce exhaust recirculation.
Wheel Stops
Bollards and wheel stops are not explicitly required by ChargePoint. However, ChargePoint
recommends these best practices and considerations when designing the site:
• Permanent bollards or wheel stops must not encroach upon the Power Module clearance listed
in the clearance diagram above. Removable bollards are allowed if service personnel have the
ability to move them as needed.
• Where permitted by code, wheel stops are preferred over bollards for head-in or back-in
spaces.
• When using wheel stops, consider the average vehicle overhang distance from tire to bumper
(passenger, bus, etc.), as well as leaving space for the driver to walk up and access the
touchscreen. General recommended distances are shown in the wheel stop image below.
• Position wheel stops to actively block at least one wheel, without presenting a trip hazard to
pedestrians walking between vehicles.
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