![]() ![]() If electricity costs ¢10.7 per kWh and the vehicle consumes 27 kWh to travel 100 miles, the cost per mile is about $0.03. To calculate the cost per mile of an EV, the cost of electricity (in dollars per kWh) and the efficiency of the vehicle (how much electricity is used to travel 100 miles) must be known. The fuel efficiency of an EV may be measured in kilowatt-hours (kWh) per 100 miles. In many areas, a site installation plan must be submitted to the permitting authority for approval before installation. If possible, consult vehicle manufacturer guidance for information about the required charging equipment and learn the specifications before purchasing equipment or electrical services. NEC Article 625 contains most of the information applicable to charging equipment. Your electrical contractor should understand and use the appropriate NEC for a safe and code-compliant installation. EV charging infrastructure is considered a continuous load by the National Electrical Code (NEC). You can learn about related codes and standards on the Codes and Standards Resources page. Appropriate permits may be required from the local building and permitting authorities. Complying with RegulationsĬharging equipment installations must comply with local, state, and national codes and regulations. ![]() In recent years, other cities have followed suit, such as Seattle’s tip sheets for both residential and commercial EV charging installations. The City of San Jose, California, was one of the first to issue requirements for installing vehicle charging systems in single-family homes and duplexes, and explains the permitting process and location planning for a home charging unit. However, a qualified electrician can add circuits to accommodate the capacity needed for Level 2 charging. Some homes might have insufficient electric capacity for Level 2 equipment. Purchasing safety-certified equipment is recommended, such as the products certified under the ENERGY STAR label, which are tested by a nationally recognized testing laboratory, along with having a certified electrical contractor.Įlectricians can inform homeowners whether their home has adequate electrical capacity for vehicle charging. ![]() More advanced, "smart" Level 2 products have features such as data collection, user interface systems, enhanced displays, charging timers, communications capabilities, and keypads. Most Level 2 products have standard safety features and status lights. State and utility incentives may be available to help offset the cost of charging equipment. Level 2 charging equipment can be installed for drivers with less regular schedules, longer commutes, or EVs with large batteries that require more than overnight (or the typical dwell time) to fully charge. Many EV owners are able to meet their daily driving range requirements by charging overnight with Level 1 equipment, requiring no additional cost or installation, provided that a power outlet on a dedicated branch circuit is available near their parking location.
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