Minimum of how many VDC is required for battery start?

• A. 14 VDC
• B. 15 VDC
• C. 19 VDC
• D. 17 VDC

Answer: (D)

The key idea is how much voltage the battery must provide under start load to reliably energize the starter and start circuitry. If the battery voltage drops too low, the starter cannot draw enough current to spin up the engine, and the start attempt will fail.

For the MH-65E, 17 VDC is the minimum needed to energize the starter relay and allow the starter motor to crank the engine. At or above this voltage, the system has enough potential to overcome the starter load and initiate ignition. Values lower than that (like 14 or 15 V) are not sufficient to guarantee a crank, while a higher figure (such as 19 V) would still work but is not the minimum threshold. After start, system voltage climbs toward the normal level as the alternator comes online.