How Many Volts Is An Electric Car Battery. Modern electric cars use Lithium batteries to power their cars due to some obvious reasons which we will discuss later in this article. From the diagram above - a DC 400 V 125 amps fast charger can deliver max 50 kW.
When your car is running your battery should register between 137 and 147 volts. The very simplest DC controller would be a big onoff switch wired to the accelerator pedal. With the engine off you should get a reading of 126 volts.
The controllers job in a DC electric car is easy to understand.
In our car 18 x 44 792 x 12 95 ah batteries at 144 volts needed to go the 44 miles. To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off preferably overnight this provides you with the car battery open circuit voltage or also know as the resting voltage. A fully charged car battery voltage ranges from 137 to 147 volts it will drop to 124 volts. In fact EV manufacturers guarantee it.
