Features and Benefits

Lowest Cost-Per-Kilowatt

Gemini® offers a high value, low cost alternative to large, single engine gensets. By using two smaller, less costly engines to match the output of a large, single engine genset, Gemini units provide the lowest cost per kilowatt in the industry.

Highest Kilowatts-per-ft²

Gemini packs 1000 kilowatts (1MW) of power into a space that's 30 to 40% smaller than many single engine 1MW generators.

Redundancy

As part of our Modular Power Systems (MPS) line, Gemini features built-in redundancy for superior system reliability. With its load shedding capability, Gemini can retain coverage of critical circuits with one genset off-line for maintenance.

Scalability

Gemini lets you purchase the system you need today and as your power requirements increase, additional units can be added quickly and easily. Up to seven Gemini systems (14 gensets) can be combined for a total output of up to 7000 kW.

Flexibility

If you need to add less than 1MW, you're not limited to adding another Gemini unit. Gemini can also be combined with single MPS gensets to meet your exact requirements.

Enclosure Options

For outdoor applications, Gemini comes in a weather-resistant and sound attenuated enclosure. An open genset option is available for indoor applications.

Outstanding Transient Response

Because adjustment of the fuel ratio is virtually instantaneous as load conditions change, transient response to sudden loads is superior to spark-ignited systems and very nearly the same as diesel.

Closed Recovery Cooling System

This closed, pressurized system virtually eliminates the introduction of air into the cooling system. Rust and fluid acidity are minimized, resulting in longer engine life.

Isochronous Governor

Constant speed control provides faster response to block loads and a more consistent output frequency. All generators utilizing PowerManager® control systems feature an isochronous governor.

Vibration Isolation

Standard vibration isolators virtually eliminate transmission of vibration from the unit to the mounting surface.

Automatic Alarms & Shutdowns

Generator functions are constantly monitored through a protective system that features solid state circuitry for reliability and long life. NFPA 110 required warnings and alarms provide alerts for a variety of safety and operational concerns. The system automatically shuts down in response to certain critical conditions such as high engine temperature, low coolant level, etc. All generators utilizing PowerManager® control systems meet NFPA 110 requirements for warnings, alarms and alerts.

Advanced Wire Harness Design with Waterproof Connectors

Our wire harness design assures reliable, repeatable interconnection between circuit components. Special sealed connectors protect against moisture, dust and environmental damage.

Generac Manufactured Alternators

Our revolving field alternators are fully-insulated and self-ventilating. They feature higher temperature Class H insulation, but are designed to operate at lower, Class F temperature levels for longer life. Oversized alternators are available on many models for additional motor starting capacity.

Solid-State Sensing and Starting Control

Provides the ultimate in engine protection. The magnetic pickup senses overspeed, automatically shuts down the engine, disconnects the starter motor and prevents re-engagement. The system also provides cyclic cranking for improved starting reliability and cranking termination for starter motor protection.

Solid-State, Frequency Compensated Voltage Regulation (V/F)

Provides fast, optimized response to changing load conditions. Maximum motor starting capability is assured by electronically torque-matching the surge loads to the engine.

Permanent Magnet Excitation (PME)

Provides sustained short circuit current for breaker coordination. Increases motor starting capabilities and enhances performance when load-induced harmonics are present. Standard on 150 kW and larger. Optional on smaller gensets.

Easy To Service

All service points are located at the perimeter of the frame for easy access.

Superior Paint

Our textured, powder coat paint process provides consistent coverage and better bonding to seams and exposed edges providing durability and a long-lasting, tough finish.

UL-Listed

All Generac standby generators are UL 2200 listed and our transfer switches are UL 1008 listed. UL listing verifies the kilowatt ratings of our generators and is your assurance that Generac standby systems meet the highest safety standards.

Made in USA

Generac generators are made in the United States by Generac Power Systems Inc. We design and manufacture all of the major components including the alternators, controls and enclosures. This unprecedented degree of control ensures that Generac products are built to the highest standards for quality, reliability and durability.