Posts: 76
Joined: Wed Feb 15, 2017 12:02 am

Workplace charging do's and don'ts

Wed May 17, 2017 5:29 am ... dDonts.pdf

Employees are buying more
and more plug-in electric
vehicles, (PEVs) which include
battery electric and plug-in
hybrid electric vehicles. As a
result, many employers have
added workplace charging to
support the use of clean
technology vehicles. Here are
some things to consider
when adding charging at
the workplace.
Levels 1 and 2 electric vehicle supply equipment (EVSE) are the interface between the electric grid and
PEVs. EVSE safely provides AC electricity to the car. The battery charger is located onboard the PEV. Level 1
EVSE can be hard-wired to an electrical circuit or it can be portable and plugged into a 110/120-volt outlet.
Level 2 EVSE is hard-wired to an electrical circuit and mounted on a wall or pedestal.
Level 1 and 2 EVSE both use a standard plug, called a SAE J1772 connector, to connect to the PEV charge
port. All PEVs have a J1772 charge port. Level 1 can be more suitable for charging smaller batteries, but it
can charge too slowly for larger battery packs.
Direct Current Fast Chargers (DCFC) contain an o-board charger and provide DC electricity directly to the
PEV battery. The battery charger is located inside the fast charger.
Three fast charger technologies (SAE Combo Connector, CHAdeMO, Tesla) are in use today and are not
compatible. So it’s important to match the type of fast charger technology to the fast charger technology
of employees’ vehicles. Not all PEVs can be fast-charged.
Workplace Charging
Do’s and Don'ts
Things to think about before adding charging
infrastructure for light-duty plug-in electric vehicles
Charging Level Charge Time to go 25 miles Hardware Costs Installation Costs*
Level 1 – 110 V 6 hours $0 to $5 $0 to 2,000
Level 2 – 220 V < 2 hours $500 to $4,000 $2,000 to $3,000
Fast Chargers 13 to 21 minutes $6,500 to $45,000 $8,000 to $85,000
*Installation costs vary widely by site.
Charging infrastructure levels, performance and costs
• Demand charges occur if power demand exceeds a certain level
on a single electric meter, which is often 20 kW. Fast charging is
often at 50 kW
• Demand charges can exceed $1,000 per month
• Four or more Level 2 EVSE can exceed 20 kW
• Cutting concrete or asphalt for trenching
• Boring
• Long distances from the electrical service
• Updating or adding electrical service
• Pedestal mounting
• Excessive permitting requirements
• Requirements for engineering drawings
• ADA compliance
• Sucient electric power already exists
• Hanging Level 1 and 2 EVSE on walls
• Running wall-mounted conduit
• Soft soil or grassy area trenching
• Siting infrastructure near electric service
• Work with the local electric utility
• Plan for future infrastructure additions by running additional conduit
• Size infrastructure for potentially larger batteries in future PEVs
Installation costs
for all charging levels
Pick the best sites to save
money on installation
Consider high cost of demand charges
• EVSE siting should consider employee, visitor and work-eet use
• Workplace EVSE need dened processes and procedures for shared use
• Visitor EVSE should operate in a manner similar to public charging
• Focus on siting distances from the electrical service (closer is cheaper)
• Use proper signage
• A charging policy should be developed that covers employees' shared use of
single EVSE, the use of cord sets that can reach multiple parking spaces, what
if any, fees for employees' workplace charging, and the management of peak
demand versus electricity supply issues
• Consider tax implications for providing employees free charging

Posts: 35
Joined: Wed Feb 15, 2017 12:02 am

Re: Workplace charging do's and don'ts

Sat May 20, 2017 1:09 am

Seems like a work charging station has to be planned right or could cost the employer a lot of money. I guess this is why I usually don't see more than two to four charging stations at the bank, library or business

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