NEW PRODUCT ALERT: Groundbreaking Ultra Performance at Idle Alternator Series Offers More Power, Faster Charging

You asked for more power. Now it's here!

Introducing the Ultra Performance at Idle (UPI) alternator series, providing more output across the board at both lower and upper RPM. Plus, the increased power output at lower RPM means faster charging capability at lower speeds, including at idle.

The Ultra Performance at Idle (UPI) series is APS’ next-generation line of alternators based on our original High Performance at Idle (HPI) alternator series. The new alternators share the same weight, size, and other mechanical specifications as the HPI versions but with higher output at both upper and lower ranges of the RPM output curve. This means the new alternators offer the same form and fit as HPI versions in under-the-hood configurations for all vehicles APS products currently fit.

Available in 12-, 24-, and 48-volt models, the UPI series offers six different configurations ranging from 165 amps to 390 amps at output.