Electric Vehicle University - 230b ESTABLISHING YOUR OWN EV INFRASTRUCTURE

Building a Home ChargerInfrastructure, part 2

EV-230

This course is presented as part of Evannex Universitya free, open learning environment that presents concise, video-based mini-courses for those who have interest in electric vehicles (EVs)

What is a Home Infrastructure?

>> To review what we learned in part 1, the EV charging infrastructure begins at your service panelthe place where electricity from the grid gets distributed to all of the circuits in your house

>>

What is a Home Infrastructure?

>> To review what we learned in part 1, the EV charging infrastructure begins at your service panelthe place where electricity from the grid gets distributed to all of the circuits in your house

A charging circuit is run from the service panel in your basement or garage to the location where youll be charging your EV.

Then, depending on the type of EV you have, youll either need a 240V receptacle, like a NEMA 14-50, or a charging unit, properly called Electric Vehicle Service Equipment, EVSE.

The charging circuitCould double or triple the peak load for your houseCan draw as much or more power as a central A/C system>> use a service load calculator

Source: San Diego Electric

Because the EVSE>> Could double or triple the peak load for your house, its important to analyze your overall energy requirements to ensure that your existing electrical service can accommodate EV charging.>> an EVSE can draw as much or more power as a central A/C system>> A wide variety of service load calculators can be found on line. Use one if youre unsure of your service requirements

Installation GuidelinesCheck your service capacityAdd a new circuitChoose a 30 amp EVSEBe sure you place it near the garage door, if possibleGet the longest cord length recommendedIf youd like more technical detail, see https://www.youtube.com/watch?v=R61LyUJEupM

>> A worst case cost scenario is if your house doesnt have adequate electrical service. If your service panel (the box shown on the right side of the screen) cant handle the extra load of an EVSE, youre going to have to install new service and a new panel. Thats expensive, so a quick check now can eliminate costly surprises later, particularly if your house is older.

>> In most cases, however, adding a charging circuit is fairly simple. It will require adding a new circuit and breaker to your service panel, running appropriate cable, and making all EVSE connections. This work should be done by a licensed electrician.

>> Choose a 30 amp EVSE. It provides the fastest charging and leaves room for any future needs.

>> Be sure you place the EVSE near the garage door, if possible. This will allow you to charge your EV while its parked in the driveway.

>> Get the longest cord length recommended. No need to worry about reaching the EV charge port, either in the garage of outside it.

>> There are a variety of installation videos available on YouTube, the link shown on your screen is representative.

No garage?Youll need to run a outdoor circuit to the place where you park your carYoull need an EVSE with a NEMA 4X or 3R rating (for outdoor use)long runs of electrical cable are expensive

But what if you dont have a garage?

EV chargers can be installed outdoors.>> Youll need to run a outdoor circuit to the place where you park your car>> and Youll need an EVSE with a NEMA 4X or 3R rating (for outdoor use)

But be aware that>> long runs of electrical cable are expensive. For example,#6/4 electrical cable, recommended for 240V, 40 amp circuits costs close to $4.00 a linear foot

J1772 AC power, usually 240V, 30 ampProximity detector to make sure the plug is seated in the charger receptacle GroundCommunications connector

Source: http://www.popularmechanics.com/cars/how-to/maintenance/how-to-install-a-home-electric-car-charger-16355060

Unless you own a Tesla Model S, which has its own charging connector design, your EV will likely use a J1772 charging connector if youre located in the United States.

The connector, shown on the right of your screen, has the following layout:>> two prongs that provide AC power, usually 240V, 30 amp>> a Proximity detector to make sure the plug is seated in the charger receptacle >> a Ground>> and a communications connector that enables the EV to communicate with the EVSE about the state of battery charge and other data.

Cost of Home InfrastructureInstalling a 240 V 40 A circuit $400 to $1000 depending on difficulty and distance from service panelPurchasing an EVSE: $600 to $800With installation of the charging circuit, all-in costs can range from $400 to $1800

Now for a little bad news. Installation costs are non-trivial and include the cost of materials, an electrician, and charging equipmentthe EVSE.

>> Installation cost is a function of the distance between your service panel, and typically runs between $400 and $1000 for labor and materials.

However, costs vary widely throughout the country, so its a good idea to get a quote early.

>> A high quality EVSE typically costs between $500 and $1000.

Good news for Tesla Model S owners, your only cost is the circuit and a NEMA 14-50 receptacle.But for other EVs the additional cost of an EVSE is required.

>> So, depending on your EV and the equipment youll need, typical costs will range form $400 to $1800. Luckily, it only happens once.

SummaryA home charging infrastructure begins at your service panel and ends at your EV240 V, 30 or 40 amp service is strongly recommendedAn EVSE may be necessaryProfessional installation is requiredOne-time, all-in costs can range from $400 to $1800

To summarize:

>> A home charging infrastructure begins at your service panel and ends at your EV>> In order to get the best charging efficiency, a 240 V, 30 or 40 amp circuit is strongly recommended>> For many smaller EVs, an EVSE may be necessary>> Professional installation is required>> One-time, all-in costs can range from $400 to $1800

a free study guide for all EVU mini-courses is available for download from our website For a complete list of mini-courses and the study guide, visit: www.evannex.com

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