Disruptive Gemini™ Units
For many applications, space is at a premium. To help meet these needs, Generac introduced the first and only compact paralleled total power generator solution that houses two 500 kW generators within a single enclosure. The Gemini™ MPS Twin Pack provides 1000 kW of power in a footprint that is 20% smaller compared to single large genset. In addition, up to seven Gemini gensets can be paralleled without additional switchgear, for a total output of up to 7000 kW on a single bus.
Rest Easy … Our Integrated Controller Approach Assures No Systemic Failures
Our generators are designed to work with no functioning communications or load share lines. This means that when active communications go down, MPS generators are still fully capable of automatic starting, paralleling, and load balancing without manual starting. No other system supplies this level of automatic backup, making Generac’s standard MPS configuration the most reliable system available today.
The Generac Integrated Control concept also reduces installation hassles and eliminates complicated and custom PLC programming - saving you time and simplifying system set up.
The Integrated Generator Control concept is the basis of the modular power system category. It includes everything you need to control paralleling – synchronizer, speed governor biasing, automatic voltage regulator biasing, communications, load sharing, metering, protective relaying, operator interface and even custom logic capabilities. Everything that until now required several controllers to provide. This integrated controller platform is extremely flexible and allows you to take advantage of:
- Expandable I/O modules – analog and discrete
- Advanced communication capabilities – onsite and via web
- Support of low and medium voltage paralleling
- Custom event and alarm capabilities to site specific needs - motorized louvers, remote fuel tanks, day tanks, remote breakers, etc.
- Custom logic capabilities providing maximum application flexibility
The parallel switching can be located internally to the generator or integrated at the switchboard.
Strategies for MPS Paralleling
Since our MPS solution utilizes an integrated paralleling design concept, this allows for location flexibility in the switching and load sequencing.
Two Paralleling Switching Options
The parallel switching can be located internally to the generator or integrated at the switchboard.
Two Load Sequencing and Interface Options
Load sequencing and interface can be integrated within the Generac PM-SCi, or externally provided within a custom PLC or BMS solution.
Generac’s MPS Removes the Complexity and Fear from Medium Voltage Applications
Medium voltage applications are often specified with a medium voltage alternator and ANSI

C37.20.2 gear. However, many medium voltage systems can benefit from our integrated paralleling concept.
By paralleling on the low voltage side and feeding one or multiple transformers, many system advantages are gained:
- Facility staff are typically more comfortable interacting with low voltage generators.
- Low voltage equipment is much easier and quicker to source.
- This approach supports the integration of low voltage rental equipment when needed.
- No medium voltage paralleling switchgear sections are required, resulting in a smaller footprint and significant cost savings.
Medium-voltage—the trouble-free way—that’s Generac.