At what voltage can the battery not start?

[DelKeegan]

The battery cannot start when the voltage is below 12 volts. The load voltage should be greater than 11 volts, generally between 12V and 16V. After the car starts, the generator begins to generate electricity. For 12V vehicle systems, the battery voltage should be between 13.5 and 14.5 volts, while for 24V vehicle systems, it should be maintained between 27 and 29 volts. The quality of the battery depends on its capacity, which can be measured with a capacity meter. For example, if the battery voltage is sufficient but it runs out of power after a few ignition attempts, the battery is likely faulty. Common gasoline engine cars typically use a 12V battery, while multi-cylinder diesel engines and single-cylinder diesel engines with more than 25 horsepower usually adopt a 24V battery voltage supply.