![]() ![]() ![]() Target charge level – It’s the level of the battery that you prefer.Current charge level – It’s the level of the battery at the current state. ![]() Battery capacity, Driving range, Acceptance rate of the on-board charger can be obtained from your EV’s manual or the manufacturer’s official website.RPH (miles/h) = Efficiency (miles/kWh) x Charging power (kW). So you can get the efficiency, and the formula is:Įfficiency (miles/kWh) = Driving range (miles) / Battery capacity (kWh). This sizes a 12-volt battery while factoring a 50 depth of discharge to prevent excessively discharging the battery. Typically, electric vehicle manufacturers list the battery capacity (kWh) and the driving range (miles) of each EV on the specifications. Other chemistries, such as Li-Ion, will be different. For NiMh, for example, this would typically be 10 of the Ah rating for 10 hours. It highly depends on the car, and it’s easy to understand for most people. The charge time depends on the battery chemistry and the charge current. When you are talking about specific cars, range per hour (RPH) can be used to express the charging rate of an electric car. Charging Rate – When you are talking about the charging speed of an EV charger, charging power (kW or amps) is used to get a sense of how fast or slow the charge will take.For a home EV charger, you can know the charging power if you know the amps that the charger delivers:Ĭharging power (kW) = Current (amps) x Voltage (volts) /1,000įor a public fast charger, the charging power is given in kW directly. Charging Power – Charging power determines the rate of charging and is measured in kW. Result HANNA YOUSSEF IF your load is dc load (like a 1300w 12v DC heating element) then it will dreaw 1300/12108.33amps every hour.Battery Capacity – Battery capacity or the size of the battery is how much stored energy a battery has and is measured in kWh.Electric Vehicle Charging Basics Charging Terms KWh – kWh is a measurement of energy, which is how much power is demanded over an amount of time.Įnergy equals power (kW) multiplied by time (h). You can figure how much power (kW) can be delivered to your electric car when you use an EV charger with a known amp rating. KW – kW is a rate of power, which tells us how much energy per second an item will demand in order to work. Kilo means 1,000, and so kW means 1,000 watts. There are two primary terms in the electric car industry – kW (kilowatts) and kWh (kilowatt hours). Electricity & Electric Vehicle Charging Basics Electricity Basics ![]()
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