What is the minimum battery voltage required to start?

• A. 12 V
• B. 18 V
• C. 24 V
• D. 28 V

Answer: (C)

The PC-12 NGX starts on a 24‑volt DC electrical system, so the starter needs to see about 24 V from the battery to energize and spin the engine. If the battery voltage drops below this level, the starter can’t draw enough current to turn the starter motor reliably, and the engine won’t start. Once the engine is turning, the alternator brings the system into regulation (often around higher nominal values), but starting requires that initial 24 V. Therefore, the minimum battery voltage to start is 24 V.