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The J1772 5-pin standard supports a wide range of single-phase (1φ) alternating current (AC) charging rates. They range from portable devices that can connect to a household NEMA 5-15 outlet that can deliver 1.44 kW (12 A @ 120 V) to hardwired equipment that can deliver up to 19.2 kW (80 A @ 240 V). [2]
A popular choice for the latter is the NEMA 14-50 receptacle. This type of outlet provides 240 volts and, when wired to a 50-ampere circuit, can support charging at 40 amperes according to North American electrical code. This translates to a power supply of up to 9.6 kilowatts, [91] offering a faster and more efficient charging experience.
Three-phase transformer with four-wire output for 208Y/120 volt service: one wire for neutral, others for A, B and C phases. Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2]
The charging posts can support up to 1000 volts and up to 1000 amps (A). [14] [15] As of January 2025, they can deliver up to 325 kW. [16] The company plans to increase power delivery to 500 kW in the future. [17] On November 14, 2024, Tesla announced the introduction of the V4 Supercharger cabinet, which will start in 2025.
The Volt employs the J1772 charging plug, a standard connector for electric cars in North America. [100] Depending on in-car settings, a full charge takes from approximately 10 hours (with the 12 A setting) to as much as 14 hours (8 A setting) from a standard North American 120-volt receptacle. From a 240-volt source, a full charge takes around ...
Residential tariffs were somewhat higher at 11.36 ¢/kWh, while commercial tariffs stood at 10.28 ¢/kWh and industrial tariffs at 7.01 ¢/kWh. [44] The cost of supplying high-voltage power to high-volume industrial customers is lower than the cost of providing low-voltage (120 V) power to residential and commercial customers.
Power is the rate at which energy is generated or consumed and hence is measured in units (e.g. watts) that represent energy per unit time. For example, when a light bulb with a power rating of 100 W is turned on for one hour, the energy used is 100 watt hours (W·h), 0.1 kilowatt hour, or 360 kJ .
For example, in North America, a unique split-phase system is used to supply to most premises that works by center tapping a 240 volt transformer. This system is able to concurrently provide 240 volts and 120 volts. Consequently, this allows homeowners to wire up both 240 V and 120 V circuits as they wish (as regulated by local building codes).