S15

About the S15

The APC S15 is a power conditioner with a 1.5kVA (1500VA) capacity and battery backup, providing 900W output power at a nominal 120V output voltage. It is designed to protect sensitive audio and video equipment from power fluctuations, low voltage, blackouts, and lightning surges. The device regulates voltage by supplementing the existing voltage from the wall outlet rather than using a mechanical variac or reconstituting the full waveform, which enhances efficiency and reduces overshoot during voltage recovery. The S15 features configurable settings accessible via a front display, including delayed outlet timing, sensitivity to power fluctuations, display dimmer, battery switch thresholds, and low battery warnings. It has an input connection type of NEMA 5-15P and multiple NEMA 5-15R output connections. The unit was discontinued on June 15, 2022, and has not been replaced. APC offers lifecycle services such as extended warranties for this model. The S15 is well-regarded for its effective voltage regulation and protection capabilities in home audio/video systems.