<p>An engine starter system for driving an engine starter (1) with electrical power from a battery (4) mounted on a motor vehicle has a boost controller (5) for boosting electrical power from the battery and a large-capacitance capacitor (7) which is charged by the electrical power which is boosted by the boost controller. The engine starter is driven by the electrical energy which is stored in the capacitor at a voltage higher than the voltage of the battery.</p>
