Overview#
The Generac MD400 is a 400 kW modular diesel standby generator system powered by a Perkins 12.5-liter turbocharged and aftercooled inline-six engine. Part of Generac's Modular Power System (MPS) platform, the MD400 is factory-configured with integrated paralleling controls for plug-and-play scalability. Multiple MD400 units can be deployed together for N+1 or N+2 redundancy, and the system supports mixed configurations with other MD Series units to match evolving facility load requirements.
The modular approach simplifies logistics for facilities that cannot accommodate a single large genset. Individual units can be taken offline for maintenance without interrupting backup power, and capacity can be added incrementally as facility loads grow. At 400 kW per module, the MD400 is well-suited for campus environments and multi-building facilities that need distributed, redundant standby power.
Our Service Experience#
The MD400 shares the proven Perkins 12.5L platform with the SD400. In modular installations, paralleling controller calibration is critical during commissioning and at each annual service visit. We recommend staggered exercise schedules for each module to confirm independent load-carrying capability, along with regular parallel operation verification to ensure proper load sharing and synchronization across units.
