MQ Power Generators

MQ Power is the portable generator brand of Multiquip Inc., a Brea, California-based subsidiary of Nikken Corporation of Japan. The WhisperWatt line — manufactured by Denyo Corporation, which has been building portable generators since 1948 — is the standard specification for quiet temporary power in North American construction and rental markets. WhisperWatt units run at 65-72 dB depending on the model, which represents a reduction in perceived loudness of more than half compared to typical open-frame portable generators that exceed 80 dB. For construction sites adjacent to occupied buildings, outdoor events, and film production, WhisperWatt is the name rental desks reach for first.

The DCA series is the backbone of the MQ Power line. It spans from the compact DCA-25 (20 kW prime, Isuzu diesel) through the DCA-400 (320 kW prime, John Deere diesel), covering the portable power range that construction and event applications demand. Smaller units use Isuzu engines — among the most widely serviced small diesel platforms in North America, with parts available through Isuzu's automotive and industrial dealer network independent of Multiquip's own distribution. Larger units pair John Deere power with Denyo's sound-attenuated enclosures. The enclosures themselves are precision-engineered by Denyo, not aftermarket bolt-ons — a manufacturing detail that separates MQ Power from competitors who add sound attenuation as an accessory rather than designing it into the unit from the ground up.

MQ Power's dominance in the rental channel is not incidental. National fleets like United Rentals and Sunbelt Rentals stock WhisperWatt units as standard inventory because the combination of quiet operation, common engine platforms, and Denyo reliability keeps utilization rates high and maintenance costs predictable. Rental fleet operators — the core MQ Power customer — value the fact that any diesel mechanic can service these units without waiting for proprietary components. Multiquip also manufactures light towers, pumps, and compaction equipment through the same distribution network, making them a single-source supplier for portable jobsite power and equipment.

What MQ Power does not do is equally important to understand. These are not standby generators. They lack automatic transfer switches, permanent mounting provisions, and the utility-paralleling controls required for building backup power systems. Attempting to use a WhisperWatt as a permanent standby unit is a misapplication that no responsible equipment advisor would recommend. For standby power, the decision belongs among Cummins, Kohler, Caterpillar, and Generac. For portable power where noise matters, MQ Power WhisperWatt is the specification.