100 to 500 kW is the commercial standby sweet spot — covering most multi-tenant office buildings, mid-size data centers, hospitals, and retail anchors. Both diesel and gaseous gensets are well-represented in this band. EPA Tier 4 Final compliance starts at 56 kW, so most diesel units in this band require DPF and SCR aftertreatment; gaseous units fall under EPA Stationary Spark Ignition rules and avoid liquid-aftertreatment maintenance.
10 models in this category.
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300 kW gaseous-fueled commercial standby generator. Kohler/Rehlko 300REZXC large industrial gaseous unit for major facilities, paralleling applications, and campus power. Note: the 300 kW Kohler gas genset is sold as the 300REZXC, not as 'KG300'.
400 kW gaseous-fueled commercial standby generator. Kohler/Rehlko 400REZXB — the flagship of Kohler's industrial gaseous lineup for large facilities and paralleling arrays. Note: the 400 kW Kohler gas genset is sold as the 400REZXB, not as 'KG400'.
100 kW gaseous-fueled commercial standby generator. Upper-mid-range industrial gaseous unit for larger commercial facilities on natural gas or propane.